xref: /dokuwiki/_test/core/phpQuery-onefile.php (revision f8369d7d6e37248d6523fdac6e1d760fca4f1b52)

<?php
/**
 * phpQuery is a server-side, chainable, CSS3 selector driven
 * Document Object Model (DOM) API based on jQuery JavaScript Library.
 *
 * @version 0.9.5
 * @link http://code.google.com/p/phpquery/
 * @link http://phpquery-library.blogspot.com/
 * @link http://jquery.com/
 * @author Tobiasz Cudnik <tobiasz.cudnik/gmail.com>
 * @license http://www.opensource.org/licenses/mit-license.php MIT License
 * @package phpQuery
 */

// class names for instanceof
// TODO move them as class constants into phpQuery
define('DOMDOCUMENT', 'DOMDocument');
define('DOMELEMENT', 'DOMElement');
define('DOMNODELIST', 'DOMNodeList');
define('DOMNODE', 'DOMNode');

/**
 * DOMEvent class.
 *
 * Based on
 * @link http://developer.mozilla.org/En/DOM:event
 * @author Tobiasz Cudnik <tobiasz.cudnik/gmail.com>
 * @package phpQuery
 * @todo implement ArrayAccess ?
 */
class DOMEvent {
    /**
     * Returns a boolean indicating whether the event bubbles up through the DOM or not.
     *
     * @var unknown_type
     */
    public $bubbles = true;
    /**
     * Returns a boolean indicating whether the event is cancelable.
     *
     * @var unknown_type
     */
    public $cancelable = true;
    /**
     * Returns a reference to the currently registered target for the event.
     *
     * @var unknown_type
     */
    public $currentTarget;
    /**
     * Returns detail about the event, depending on the type of event.
     *
     * @var unknown_type
     * @link http://developer.mozilla.org/en/DOM/event.detail
     */
    public $detail; // ???
    /**
     * Used to indicate which phase of the event flow is currently being evaluated.
     *
     * NOT IMPLEMENTED
     *
     * @var unknown_type
     * @link http://developer.mozilla.org/en/DOM/event.eventPhase
     */
    public $eventPhase; // ???
    /**
     * The explicit original target of the event (Mozilla-specific).
     *
     * NOT IMPLEMENTED
     *
     * @var unknown_type
     */
    public $explicitOriginalTarget; // moz only
    /**
     * The original target of the event, before any retargetings (Mozilla-specific).
     *
     * NOT IMPLEMENTED
     *
     * @var unknown_type
     */
    public $originalTarget; // moz only
    /**
     * Identifies a secondary target for the event.
     *
     * @var unknown_type
     */
    public $relatedTarget;
    /**
     * Returns a reference to the target to which the event was originally dispatched.
     *
     * @var unknown_type
     */
    public $target;
    /**
     * Returns the time that the event was created.
     *
     * @var unknown_type
     */
    public $timeStamp;
    /**
     * Returns the name of the event (case-insensitive).
     */
    public $type;
    public $runDefault = true;
    public $data = null;
    public function __construct($data) {
        foreach($data as $k => $v) {
            $this->$k = $v;
        }
        if (! $this->timeStamp)
            $this->timeStamp = time();
    }
    /**
     * Cancels the event (if it is cancelable).
     *
     */
    public function preventDefault() {
        $this->runDefault = false;
    }
    /**
     * Stops the propagation of events further along in the DOM.
     *
     */
    public function stopPropagation() {
        $this->bubbles = false;
    }
}


/**
 * DOMDocumentWrapper class simplifies work with DOMDocument.
 *
 * Know bug:
 * - in XHTML fragments, <br /> changes to <br clear="none" />
 *
 * @todo check XML catalogs compatibility
 * @author Tobiasz Cudnik <tobiasz.cudnik/gmail.com>
 * @package phpQuery
 */
class DOMDocumentWrapper {
    /**
     * @var DOMDocument
     */
    public $document;
    public $id;
    /**
     * @todo Rewrite as method and quess if null.
     * @var unknown_type
     */
    public $contentType = '';
    public $xpath;
    public $uuid = 0;
    public $data = array();
    public $dataNodes = array();
    public $events = array();
    public $eventsNodes = array();
    public $eventsGlobal = array();
    /**
     * @TODO iframes support http://code.google.com/p/phpquery/issues/detail?id=28
     * @var unknown_type
     */
    public $frames = array();
    /**
     * Document root, by default equals to document itself.
     * Used by documentFragments.
     *
     * @var DOMNode
     */
    public $root;
    public $isDocumentFragment;
    public $isXML = false;
    public $isXHTML = false;
    public $isHTML = false;
    public $charset;
    public function __construct($markup = null, $contentType = null, $newDocumentID = null) {
        if (isset($markup))
            $this->load($markup, $contentType, $newDocumentID);
        $this->id = $newDocumentID
            ? $newDocumentID
            : md5(microtime());
    }
    public function load($markup, $contentType = null, $newDocumentID = null) {
//      phpQuery::$documents[$id] = $this;
        $this->contentType = strtolower($contentType);
        if ($markup instanceof DOMDOCUMENT) {
            $this->document = $markup;
            $this->root = $this->document;
            $this->charset = $this->document->encoding;
            // TODO isDocumentFragment
        } else {
            $loaded = $this->loadMarkup($markup);
        }
        if ($loaded) {
//          $this->document->formatOutput = true;
            $this->document->preserveWhiteSpace = true;
            $this->xpath = new DOMXPath($this->document);
            $this->afterMarkupLoad();
            return true;
            // remember last loaded document
//          return phpQuery::selectDocument($id);
        }
        return false;
    }
    protected function afterMarkupLoad() {
        if ($this->isXHTML) {
            $this->xpath->registerNamespace("html", "http://www.w3.org/1999/xhtml");
        }
    }
    protected function loadMarkup($markup) {
        $loaded = false;
        if ($this->contentType) {
            self::debug("Load markup for content type {$this->contentType}");
            // content determined by contentType
            list($contentType, $charset) = $this->contentTypeToArray($this->contentType);
            switch($contentType) {
                case 'text/html':
                    phpQuery::debug("Loading HTML, content type '{$this->contentType}'");
                    $loaded = $this->loadMarkupHTML($markup, $charset);
                break;
                case 'text/xml':
                case 'application/xhtml+xml':
                    phpQuery::debug("Loading XML, content type '{$this->contentType}'");
                    $loaded = $this->loadMarkupXML($markup, $charset);
                break;
                default:
                    // for feeds or anything that sometimes doesn't use text/xml
                    if (strpos('xml', $this->contentType) !== false) {
                        phpQuery::debug("Loading XML, content type '{$this->contentType}'");
                        $loaded = $this->loadMarkupXML($markup, $charset);
                    } else
                        phpQuery::debug("Could not determine document type from content type '{$this->contentType}'");
            }
        } else {
            // content type autodetection
            if ($this->isXML($markup)) {
                phpQuery::debug("Loading XML, isXML() == true");
                $loaded = $this->loadMarkupXML($markup);
                if (! $loaded && $this->isXHTML) {
                    phpQuery::debug('Loading as XML failed, trying to load as HTML, isXHTML == true');
                    $loaded = $this->loadMarkupHTML($markup);
                }
            } else {
                phpQuery::debug("Loading HTML, isXML() == false");
                $loaded = $this->loadMarkupHTML($markup);
            }
        }
        return $loaded;
    }
    protected function loadMarkupReset() {
        $this->isXML = $this->isXHTML = $this->isHTML = false;
    }
    protected function documentCreate($charset, $version = '1.0') {
        if (! $version)
            $version = '1.0';
        $this->document = new DOMDocument($version, $charset);
        $this->charset = $this->document->encoding;
//      $this->document->encoding = $charset;
        $this->document->formatOutput = true;
        $this->document->preserveWhiteSpace = true;
    }
    protected function loadMarkupHTML($markup, $requestedCharset = null) {
        if (phpQuery::$debug)
            phpQuery::debug('Full markup load (HTML): '.substr($markup, 0, 250));
        $this->loadMarkupReset();
        $this->isHTML = true;
        if (!isset($this->isDocumentFragment))
            $this->isDocumentFragment = self::isDocumentFragmentHTML($markup);
        $charset = null;
        $documentCharset = $this->charsetFromHTML($markup);
        $addDocumentCharset = false;
        if ($documentCharset) {
            $charset = $documentCharset;
            $markup = $this->charsetFixHTML($markup);
        } else if ($requestedCharset) {
            $charset = $requestedCharset;
        }
        if (! $charset)
            $charset = phpQuery::$defaultCharset;
        // HTTP 1.1 says that the default charset is ISO-8859-1
        // @see http://www.w3.org/International/O-HTTP-charset
        if (! $documentCharset) {
            $documentCharset = 'ISO-8859-1';
            $addDocumentCharset = true;
        }
        // Should be careful here, still need 'magic encoding detection' since lots of pages have other 'default encoding'
        // Worse, some pages can have mixed encodings... we'll try not to worry about that
        $requestedCharset = strtoupper($requestedCharset);
        $documentCharset = strtoupper($documentCharset);
        phpQuery::debug("DOC: $documentCharset REQ: $requestedCharset");
        if ($requestedCharset && $documentCharset && $requestedCharset !== $documentCharset) {
            phpQuery::debug("CHARSET CONVERT");
            // Document Encoding Conversion
            // http://code.google.com/p/phpquery/issues/detail?id=86
            if (function_exists('mb_detect_encoding')) {
                $possibleCharsets = array($documentCharset, $requestedCharset, 'AUTO');
                $docEncoding = mb_detect_encoding($markup, implode(', ', $possibleCharsets));
                if (! $docEncoding)
                    $docEncoding = $documentCharset; // ok trust the document
                phpQuery::debug("DETECTED '$docEncoding'");
                // Detected does not match what document says...
                if ($docEncoding !== $documentCharset) {
                    // Tricky..
                }
                if ($docEncoding !== $requestedCharset) {
                    phpQuery::debug("CONVERT $docEncoding => $requestedCharset");
                    $markup = mb_convert_encoding($markup, $requestedCharset, $docEncoding);
                    $markup = $this->charsetAppendToHTML($markup, $requestedCharset);
                    $charset = $requestedCharset;
                }
            } else {
                phpQuery::debug("TODO: charset conversion without mbstring...");
            }
        }
        $return = false;
        if ($this->isDocumentFragment) {
            phpQuery::debug("Full markup load (HTML), DocumentFragment detected, using charset '$charset'");
            $return = $this->documentFragmentLoadMarkup($this, $charset, $markup);
        } else {
            if ($addDocumentCharset) {
                phpQuery::debug("Full markup load (HTML), appending charset: '$charset'");
                $markup = $this->charsetAppendToHTML($markup, $charset);
            }
            phpQuery::debug("Full markup load (HTML), documentCreate('$charset')");
            $this->documentCreate($charset);
            $return = phpQuery::$debug === 2
                ? $this->document->loadHTML($markup)
                : @$this->document->loadHTML($markup);
            if ($return)
                $this->root = $this->document;
        }
        if ($return && ! $this->contentType)
            $this->contentType = 'text/html';
        return $return;
    }
    protected function loadMarkupXML($markup, $requestedCharset = null) {
        if (phpQuery::$debug)
            phpQuery::debug('Full markup load (XML): '.substr($markup, 0, 250));
        $this->loadMarkupReset();
        $this->isXML = true;
        // check agains XHTML in contentType or markup
        $isContentTypeXHTML = $this->isXHTML();
        $isMarkupXHTML = $this->isXHTML($markup);
        if ($isContentTypeXHTML || $isMarkupXHTML) {
            self::debug('Full markup load (XML), XHTML detected');
            $this->isXHTML = true;
        }
        // determine document fragment
        if (! isset($this->isDocumentFragment))
            $this->isDocumentFragment = $this->isXHTML
                ? self::isDocumentFragmentXHTML($markup)
                : self::isDocumentFragmentXML($markup);
        // this charset will be used
        $charset = null;
        // charset from XML declaration @var string
        $documentCharset = $this->charsetFromXML($markup);
        if (! $documentCharset) {
            if ($this->isXHTML) {
                // this is XHTML, try to get charset from content-type meta header
                $documentCharset = $this->charsetFromHTML($markup);
                if ($documentCharset) {
                    phpQuery::debug("Full markup load (XML), appending XHTML charset '$documentCharset'");
                    $this->charsetAppendToXML($markup, $documentCharset);
                    $charset = $documentCharset;
                }
            }
            if (! $documentCharset) {
                // if still no document charset...
                $charset = $requestedCharset;
            }
        } else if ($requestedCharset) {
            $charset = $requestedCharset;
        }
        if (! $charset) {
            $charset = phpQuery::$defaultCharset;
        }
        if ($requestedCharset && $documentCharset && $requestedCharset != $documentCharset) {
            // TODO place for charset conversion
//          $charset = $requestedCharset;
        }
        $return = false;
        if ($this->isDocumentFragment) {
            phpQuery::debug("Full markup load (XML), DocumentFragment detected, using charset '$charset'");
            $return = $this->documentFragmentLoadMarkup($this, $charset, $markup);
        } else {
            // FIXME ???
            if ($isContentTypeXHTML && ! $isMarkupXHTML)
            if (! $documentCharset) {
                phpQuery::debug("Full markup load (XML), appending charset '$charset'");
                $markup = $this->charsetAppendToXML($markup, $charset);
            }
            // see http://pl2.php.net/manual/en/book.dom.php#78929
            // LIBXML_DTDLOAD (>= PHP 5.1)
            // does XML ctalogues works with LIBXML_NONET
    //      $this->document->resolveExternals = true;
            // TODO test LIBXML_COMPACT for performance improvement
            // create document
            $this->documentCreate($charset);
            if (phpversion() < 5.1) {
                $this->document->resolveExternals = true;
                $return = phpQuery::$debug === 2
                    ? $this->document->loadXML($markup)
                    : @$this->document->loadXML($markup);
            } else {
                /** @link http://pl2.php.net/manual/en/libxml.constants.php */
                $libxmlStatic = phpQuery::$debug === 2
                    ? LIBXML_DTDLOAD|LIBXML_DTDATTR|LIBXML_NONET
                    : LIBXML_DTDLOAD|LIBXML_DTDATTR|LIBXML_NONET|LIBXML_NOWARNING|LIBXML_NOERROR;
                $return = $this->document->loadXML($markup, $libxmlStatic);
//              if (! $return)
//                  $return = $this->document->loadHTML($markup);
            }
            if ($return)
                $this->root = $this->document;
        }
        if ($return) {
            if (! $this->contentType) {
                if ($this->isXHTML)
                    $this->contentType = 'application/xhtml+xml';
                else
                    $this->contentType = 'text/xml';
            }
            return $return;
        } else {
            throw new Exception("Error loading XML markup");
        }
    }
    protected function isXHTML($markup = null) {
        if (! isset($markup)) {
            return strpos($this->contentType, 'xhtml') !== false;
        }
        // XXX ok ?
        return strpos($markup, "<!DOCTYPE html") !== false;
//      return stripos($doctype, 'xhtml') !== false;
//      $doctype = isset($dom->doctype) && is_object($dom->doctype)
//          ? $dom->doctype->publicId
//          : self::$defaultDoctype;
    }
    protected function isXML($markup) {
//      return strpos($markup, '<?xml') !== false && stripos($markup, 'xhtml') === false;
        return strpos(substr($markup, 0, 100), '<'.'?xml') !== false;
    }
    protected function contentTypeToArray($contentType) {
        $matches = explode(';', trim(strtolower($contentType)));
        if (isset($matches[1])) {
            $matches[1] = explode('=', $matches[1]);
            // strip 'charset='
            $matches[1] = isset($matches[1][1]) && trim($matches[1][1])
                ? $matches[1][1]
                : $matches[1][0];
        } else
            $matches[1] = null;
        return $matches;
    }
    /**
     *
     * @param $markup
     * @return array contentType, charset
     */
    protected function contentTypeFromHTML($markup) {
        $matches = array();
        // find meta tag
        preg_match('@<meta[^>]+http-equiv\\s*=\\s*(["|\'])Content-Type\\1([^>]+?)>@i',
            $markup, $matches
        );
        if (! isset($matches[0]))
            return array(null, null);
        // get attr 'content'
        preg_match('@content\\s*=\\s*(["|\'])(.+?)\\1@', $matches[0], $matches);
        if (! isset($matches[0]))
            return array(null, null);
        return $this->contentTypeToArray($matches[2]);
    }
    protected function charsetFromHTML($markup) {
        $contentType = $this->contentTypeFromHTML($markup);
        return $contentType[1];
    }
    protected function charsetFromXML($markup) {
        $matches;
        // find declaration
        preg_match('@<'.'?xml[^>]+encoding\\s*=\\s*(["|\'])(.*?)\\1@i',
            $markup, $matches
        );
        return isset($matches[2])
            ? strtolower($matches[2])
            : null;
    }
    /**
     * Repositions meta[type=charset] at the start of head. Bypasses DOMDocument bug.
     *
     * @link http://code.google.com/p/phpquery/issues/detail?id=80
     * @param $html
     */
    protected function charsetFixHTML($markup) {
        $matches = array();
        // find meta tag
        preg_match('@\s*<meta[^>]+http-equiv\\s*=\\s*(["|\'])Content-Type\\1([^>]+?)>@i',
            $markup, $matches, PREG_OFFSET_CAPTURE
        );
        if (! isset($matches[0]))
            return;
        $metaContentType = $matches[0][0];
        $markup = substr($markup, 0, $matches[0][1])
            .substr($markup, $matches[0][1]+strlen($metaContentType));
        $headStart = stripos($markup, '<head>');
        $markup = substr($markup, 0, $headStart+6).$metaContentType
            .substr($markup, $headStart+6);
        return $markup;
    }
    protected function charsetAppendToHTML($html, $charset, $xhtml = false) {
        // remove existing meta[type=content-type]
        $html = preg_replace('@\s*<meta[^>]+http-equiv\\s*=\\s*(["|\'])Content-Type\\1([^>]+?)>@i', '', $html);
        $meta = '<meta http-equiv="Content-Type" content="text/html;charset='
            .$charset.'" '
            .($xhtml ? '/' : '')
            .'>';
        if (strpos($html, '<head') === false) {
            if (strpos($hltml, '<html') === false) {
                return $meta.$html;
            } else {
                return preg_replace(
                    '@<html(.*?)(?(?<!\?)>)@s',
                    "<html\\1><head>{$meta}</head>",
                    $html
                );
            }
        } else {
            return preg_replace(
                '@<head(.*?)(?(?<!\?)>)@s',
                '<head\\1>'.$meta,
                $html
            );
        }
    }
    protected function charsetAppendToXML($markup, $charset) {
        $declaration = '<'.'?xml version="1.0" encoding="'.$charset.'"?'.'>';
        return $declaration.$markup;
    }
    public static function isDocumentFragmentHTML($markup) {
        return stripos($markup, '<html') === false && stripos($markup, '<!doctype') === false;
    }
    public static function isDocumentFragmentXML($markup) {
        return stripos($markup, '<'.'?xml') === false;
    }
    public static function isDocumentFragmentXHTML($markup) {
        return self::isDocumentFragmentHTML($markup);
    }
    public function importAttr($value) {
        // TODO
    }
    /**
     *
     * @param $source
     * @param $target
     * @param $sourceCharset
     * @return array Array of imported nodes.
     */
    public function import($source, $sourceCharset = null) {
        // TODO charset conversions
        $return = array();
        if ($source instanceof DOMNODE && !($source instanceof DOMNODELIST))
            $source = array($source);
//      if (is_array($source)) {
//          foreach($source as $node) {
//              if (is_string($node)) {
//                  // string markup
//                  $fake = $this->documentFragmentCreate($node, $sourceCharset);
//                  if ($fake === false)
//                      throw new Exception("Error loading documentFragment markup");
//                  else
//                      $return = array_merge($return,
//                          $this->import($fake->root->childNodes)
//                      );
//              } else {
//                  $return[] = $this->document->importNode($node, true);
//              }
//          }
//          return $return;
//      } else {
//          // string markup
//          $fake = $this->documentFragmentCreate($source, $sourceCharset);
//          if ($fake === false)
//              throw new Exception("Error loading documentFragment markup");
//          else
//              return $this->import($fake->root->childNodes);
//      }
        if (is_array($source) || $source instanceof DOMNODELIST) {
            // dom nodes
            self::debug('Importing nodes to document');
            foreach($source as $node)
                $return[] = $this->document->importNode($node, true);
        } else {
            // string markup
            $fake = $this->documentFragmentCreate($source, $sourceCharset);
            if ($fake === false)
                throw new Exception("Error loading documentFragment markup");
            else
                return $this->import($fake->root->childNodes);
        }
        return $return;
    }
    /**
     * Creates new document fragment.
     *
     * @param $source
     * @return DOMDocumentWrapper
     */
    protected function documentFragmentCreate($source, $charset = null) {
        $fake = new DOMDocumentWrapper();
        $fake->contentType = $this->contentType;
        $fake->isXML = $this->isXML;
        $fake->isHTML = $this->isHTML;
        $fake->isXHTML = $this->isXHTML;
        $fake->root = $fake->document;
        if (! $charset)
            $charset = $this->charset;
//  $fake->documentCreate($this->charset);
        if ($source instanceof DOMNODE && !($source instanceof DOMNODELIST))
            $source = array($source);
        if (is_array($source) || $source instanceof DOMNODELIST) {
            // dom nodes
            // load fake document
            if (! $this->documentFragmentLoadMarkup($fake, $charset))
                return false;
            $nodes = $fake->import($source);
            foreach($nodes as $node)
                $fake->root->appendChild($node);
        } else {
            // string markup
            $this->documentFragmentLoadMarkup($fake, $charset, $source);
        }
        return $fake;
    }
    /**
     *
     * @param $document DOMDocumentWrapper
     * @param $markup
     * @return $document
     */
    private function documentFragmentLoadMarkup($fragment, $charset, $markup = null) {
        // TODO error handling
        // TODO copy doctype
        // tempolary turn off
        $fragment->isDocumentFragment = false;
        if ($fragment->isXML) {
            if ($fragment->isXHTML) {
                // add FAKE element to set default namespace
                $fragment->loadMarkupXML('<?xml version="1.0" encoding="'.$charset.'"?>'
                    .'<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" '
                    .'"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">'
                    .'<fake xmlns="http://www.w3.org/1999/xhtml">'.$markup.'</fake>');
                $fragment->root = $fragment->document->firstChild->nextSibling;
            } else {
                $fragment->loadMarkupXML('<?xml version="1.0" encoding="'.$charset.'"?><fake>'.$markup.'</fake>');
                $fragment->root = $fragment->document->firstChild;
            }
        } else {
            $markup2 = phpQuery::$defaultDoctype.'<html><head><meta http-equiv="Content-Type" content="text/html;charset='
                .$charset.'"></head>';
            $noBody = strpos($markup, '<body') === false;
            if ($noBody)
                $markup2 .= '<body>';
            $markup2 .= $markup;
            if ($noBody)
                $markup2 .= '</body>';
            $markup2 .= '</html>';
            $fragment->loadMarkupHTML($markup2);
            // TODO resolv body tag merging issue
            $fragment->root = $noBody
                ? $fragment->document->firstChild->nextSibling->firstChild->nextSibling
                : $fragment->document->firstChild->nextSibling->firstChild->nextSibling;
        }
        if (! $fragment->root)
            return false;
        $fragment->isDocumentFragment = true;
        return true;
    }
    protected function documentFragmentToMarkup($fragment) {
        phpQuery::debug('documentFragmentToMarkup');
        $tmp = $fragment->isDocumentFragment;
        $fragment->isDocumentFragment = false;
        $markup = $fragment->markup();
        if ($fragment->isXML) {
            $markup = substr($markup, 0, strrpos($markup, '</fake>'));
            if ($fragment->isXHTML) {
                $markup = substr($markup, strpos($markup, '<fake')+43);
            } else {
                $markup = substr($markup, strpos($markup, '<fake>')+6);
            }
        } else {
                $markup = substr($markup, strpos($markup, '<body>')+6);
                $markup = substr($markup, 0, strrpos($markup, '</body>'));
        }
        $fragment->isDocumentFragment = $tmp;
        if (phpQuery::$debug)
            phpQuery::debug('documentFragmentToMarkup: '.substr($markup, 0, 150));
        return $markup;
    }
    /**
     * Return document markup, starting with optional $nodes as root.
     *
     * @param $nodes    DOMNode|DOMNodeList
     * @return string
     */
    public function markup($nodes = null, $innerMarkup = false) {
        if (isset($nodes) && count($nodes) == 1 && $nodes[0] instanceof DOMDOCUMENT)
            $nodes = null;
        if (isset($nodes)) {
            $markup = '';
            if (!is_array($nodes) && !($nodes instanceof DOMNODELIST) )
                $nodes = array($nodes);
            if ($this->isDocumentFragment && ! $innerMarkup)
                foreach($nodes as $i => $node)
                    if ($node->isSameNode($this->root)) {
                    //  var_dump($node);
                        $nodes = array_slice($nodes, 0, $i)
                            + phpQuery::DOMNodeListToArray($node->childNodes)
                            + array_slice($nodes, $i+1);
                        }
            if ($this->isXML && ! $innerMarkup) {
                self::debug("Getting outerXML with charset '{$this->charset}'");
                // we need outerXML, so we can benefit from
                // $node param support in saveXML()
                foreach($nodes as $node)
                    $markup .= $this->document->saveXML($node);
            } else {
                $loop = array();
                if ($innerMarkup)
                    foreach($nodes as $node) {
                        if ($node->childNodes)
                            foreach($node->childNodes as $child)
                                $loop[] = $child;
                        else
                            $loop[] = $node;
                    }
                else
                    $loop = $nodes;
                self::debug("Getting markup, moving selected nodes (".count($loop).") to new DocumentFragment");
                $fake = $this->documentFragmentCreate($loop);
                $markup = $this->documentFragmentToMarkup($fake);
            }
            if ($this->isXHTML) {
                self::debug("Fixing XHTML");
                $markup = self::markupFixXHTML($markup);
            }
            self::debug("Markup: ".substr($markup, 0, 250));
            return $markup;
        } else {
            if ($this->isDocumentFragment) {
                // documentFragment, html only...
                self::debug("Getting markup, DocumentFragment detected");
//              return $this->markup(
////                    $this->document->getElementsByTagName('body')->item(0)
//                  $this->document->root, true
//              );
                $markup = $this->documentFragmentToMarkup($this);
                // no need for markupFixXHTML, as it's done thought markup($nodes) method
                return $markup;
            } else {
                self::debug("Getting markup (".($this->isXML?'XML':'HTML')."), final with charset '{$this->charset}'");
                $markup = $this->isXML
                    ? $this->document->saveXML()
                    : $this->document->saveHTML();
                if ($this->isXHTML) {
                    self::debug("Fixing XHTML");
                    $markup = self::markupFixXHTML($markup);
                }
                self::debug("Markup: ".substr($markup, 0, 250));
                return $markup;
            }
        }
    }
    protected static function markupFixXHTML($markup) {
        $markup = self::expandEmptyTag('script', $markup);
        $markup = self::expandEmptyTag('select', $markup);
        $markup = self::expandEmptyTag('textarea', $markup);
        return $markup;
    }
    public static function debug($text) {
        phpQuery::debug($text);
    }
    /**
     * expandEmptyTag
     *
     * @param $tag
     * @param $xml
     * @return unknown_type
     * @author mjaque at ilkebenson dot com
     * @link http://php.net/manual/en/domdocument.savehtml.php#81256
     */
    public static function expandEmptyTag($tag, $xml){
        $indice = 0;
        while ($indice< strlen($xml)){
            $pos = strpos($xml, "<$tag ", $indice);
            if ($pos){
                $posCierre = strpos($xml, ">", $pos);
                if ($xml[$posCierre-1] == "/"){
                    $xml = substr_replace($xml, "></$tag>", $posCierre-1, 2);
                }
                $indice = $posCierre;
            }
            else break;
        }
        return $xml;
    }
}

/**
 * Event handling class.
 *
 * @author Tobiasz Cudnik
 * @package phpQuery
 * @static
 */
abstract class phpQueryEvents {
    /**
     * Trigger a type of event on every matched element.
     *
     * @param DOMNode|phpQueryObject|string $document
     * @param unknown_type $type
     * @param unknown_type $data
     *
     * @TODO exclusive events (with !)
     * @TODO global events (test)
     * @TODO support more than event in $type (space-separated)
     */
    public static function trigger($document, $type, $data = array(), $node = null) {
        // trigger: function(type, data, elem, donative, extra) {
        $documentID = phpQuery::getDocumentID($document);
        $namespace = null;
        if (strpos($type, '.') !== false)
            list($name, $namespace) = explode('.', $type);
        else
            $name = $type;
        if (! $node) {
            if (self::issetGlobal($documentID, $type)) {
                $pq = phpQuery::getDocument($documentID);
                // TODO check add($pq->document)
                $pq->find('*')->add($pq->document)
                    ->trigger($type, $data);
            }
        } else {
            if (isset($data[0]) && $data[0] instanceof DOMEvent) {
                $event = $data[0];
                $event->relatedTarget = $event->target;
                $event->target = $node;
                $data = array_slice($data, 1);
            } else {
                $event = new DOMEvent(array(
                    'type' => $type,
                    'target' => $node,
                    'timeStamp' => time(),
                ));
            }
            $i = 0;
            while($node) {
                // TODO whois
                phpQuery::debug("Triggering ".($i?"bubbled ":'')."event '{$type}' on "
                    ."node \n");//.phpQueryObject::whois($node)."\n");
                $event->currentTarget = $node;
                $eventNode = self::getNode($documentID, $node);
                if (isset($eventNode->eventHandlers)) {
                    foreach($eventNode->eventHandlers as $eventType => $handlers) {
                        $eventNamespace = null;
                        if (strpos($type, '.') !== false)
                            list($eventName, $eventNamespace) = explode('.', $eventType);
                        else
                            $eventName = $eventType;
                        if ($name != $eventName)
                            continue;
                        if ($namespace && $eventNamespace && $namespace != $eventNamespace)
                            continue;
                        foreach($handlers as $handler) {
                            phpQuery::debug("Calling event handler\n");
                            $event->data = $handler['data']
                                ? $handler['data']
                                : null;
                            $params = array_merge(array($event), $data);
                            $return = phpQuery::callbackRun($handler['callback'], $params);
                            if ($return === false) {
                                $event->bubbles = false;
                            }
                        }
                    }
                }
                // to bubble or not to bubble...
                if (! $event->bubbles)
                    break;
                $node = $node->parentNode;
                $i++;
            }
        }
    }
    /**
     * Binds a handler to one or more events (like click) for each matched element.
     * Can also bind custom events.
     *
     * @param DOMNode|phpQueryObject|string $document
     * @param unknown_type $type
     * @param unknown_type $data Optional
     * @param unknown_type $callback
     *
     * @TODO support '!' (exclusive) events
     * @TODO support more than event in $type (space-separated)
     * @TODO support binding to global events
     */
    public static function add($document, $node, $type, $data, $callback = null) {
        phpQuery::debug("Binding '$type' event");
        $documentID = phpQuery::getDocumentID($document);
//      if (is_null($callback) && is_callable($data)) {
//          $callback = $data;
//          $data = null;
//      }
        $eventNode = self::getNode($documentID, $node);
        if (! $eventNode)
            $eventNode = self::setNode($documentID, $node);
        if (!isset($eventNode->eventHandlers[$type]))
            $eventNode->eventHandlers[$type] = array();
        $eventNode->eventHandlers[$type][] = array(
            'callback' => $callback,
            'data' => $data,
        );
    }
    /**
     * Enter description here...
     *
     * @param DOMNode|phpQueryObject|string $document
     * @param unknown_type $type
     * @param unknown_type $callback
     *
     * @TODO namespace events
     * @TODO support more than event in $type (space-separated)
     */
    public static function remove($document, $node, $type = null, $callback = null) {
        $documentID = phpQuery::getDocumentID($document);
        $eventNode = self::getNode($documentID, $node);
        if (is_object($eventNode) && isset($eventNode->eventHandlers[$type])) {
            if ($callback) {
                foreach($eventNode->eventHandlers[$type] as $k => $handler)
                    if ($handler['callback'] == $callback)
                        unset($eventNode->eventHandlers[$type][$k]);
            } else {
                unset($eventNode->eventHandlers[$type]);
            }
        }
    }
    protected static function getNode($documentID, $node) {
        foreach(phpQuery::$documents[$documentID]->eventsNodes as $eventNode) {
            if ($node->isSameNode($eventNode))
                return $eventNode;
        }
    }
    protected static function setNode($documentID, $node) {
        phpQuery::$documents[$documentID]->eventsNodes[] = $node;
        return phpQuery::$documents[$documentID]->eventsNodes[
            count(phpQuery::$documents[$documentID]->eventsNodes)-1
        ];
    }
    protected static function issetGlobal($documentID, $type) {
        return isset(phpQuery::$documents[$documentID])
            ? in_array($type, phpQuery::$documents[$documentID]->eventsGlobal)
            : false;
    }
}


interface ICallbackNamed {
    function hasName();
    function getName();
}
/**
 * Callback class introduces currying-like pattern.
 *
 * Example:
 * function foo($param1, $param2, $param3) {
 *   var_dump($param1, $param2, $param3);
 * }
 * $fooCurried = new Callback('foo',
 *   'param1 is now statically set',
 *   new CallbackParam, new CallbackParam
 * );
 * phpQuery::callbackRun($fooCurried,
 *  array('param2 value', 'param3 value'
 * );
 *
 * Callback class is supported in all phpQuery methods which accepts callbacks.
 *
 * @link http://code.google.com/p/phpquery/wiki/Callbacks#Param_Structures
 * @author Tobiasz Cudnik <tobiasz.cudnik/gmail.com>
 *
 * @TODO??? return fake forwarding function created via create_function
 * @TODO honor paramStructure
 */
class Callback
    implements ICallbackNamed {
    public $callback = null;
    public $params = null;
    protected $name;
    public function __construct($callback, $param1 = null, $param2 = null,
            $param3 = null) {
        $params = func_get_args();
        $params = array_slice($params, 1);
        if ($callback instanceof Callback) {
            // TODO implement recurention
        } else {
            $this->callback = $callback;
            $this->params = $params;
        }
    }
    public function getName() {
        return 'Callback: '.$this->name;
    }
    public function hasName() {
        return isset($this->name) && $this->name;
    }
    public function setName($name) {
        $this->name = $name;
        return $this;
    }
    // TODO test me
//  public function addParams() {
//      $params = func_get_args();
//      return new Callback($this->callback, $this->params+$params);
//  }
}
/**
 * Shorthand for new Callback(create_function(...), ...);
 *
 * @author Tobiasz Cudnik <tobiasz.cudnik/gmail.com>
 */
class CallbackBody extends Callback {
    public function __construct($paramList, $code, $param1 = null, $param2 = null,
            $param3 = null) {
        $params = func_get_args();
        $params = array_slice($params, 2);
        $this->callback = create_function($paramList, $code);
        $this->params = $params;
    }
}
/**
 * Callback type which on execution returns reference passed during creation.
 *
 * @author Tobiasz Cudnik <tobiasz.cudnik/gmail.com>
 */
class CallbackReturnReference extends Callback
    implements ICallbackNamed {
    protected $reference;
    public function __construct(&$reference, $name = null){
        $this->reference =& $reference;
        $this->callback = array($this, 'callback');
    }
    public function callback() {
        return $this->reference;
    }
    public function getName() {
        return 'Callback: '.$this->name;
    }
    public function hasName() {
        return isset($this->name) && $this->name;
    }
}
/**
 * Callback type which on execution returns value passed during creation.
 *
 * @author Tobiasz Cudnik <tobiasz.cudnik/gmail.com>
 */
class CallbackReturnValue extends Callback
    implements ICallbackNamed {
    protected $value;
    protected $name;
    public function __construct($value, $name = null){
        $this->value =& $value;
        $this->name = $name;
        $this->callback = array($this, 'callback');
    }
    public function callback() {
        return $this->value;
    }
    public function __toString() {
        return $this->getName();
    }
    public function getName() {
        return 'Callback: '.$this->name;
    }
    public function hasName() {
        return isset($this->name) && $this->name;
    }
}
/**
 * CallbackParameterToReference can be used when we don't really want a callback,
 * only parameter passed to it. CallbackParameterToReference takes first
 * parameter's value and passes it to reference.
 *
 * @author Tobiasz Cudnik <tobiasz.cudnik/gmail.com>
 */
class CallbackParameterToReference extends Callback {
    /**
     * @param $reference
     * @TODO implement $paramIndex;
     * param index choose which callback param will be passed to reference
     */
    public function __construct(&$reference){
        $this->callback =& $reference;
    }
}
//class CallbackReference extends Callback {
//  /**
//   *
//   * @param $reference
//   * @param $paramIndex
//   * @todo implement $paramIndex; param index choose which callback param will be passed to reference
//   */
//  public function __construct(&$reference, $name = null){
//      $this->callback =& $reference;
//  }
//}
class CallbackParam {}

/**
 * Class representing phpQuery objects.
 *
 * @author Tobiasz Cudnik <tobiasz.cudnik/gmail.com>
 * @package phpQuery
 * @method phpQueryObject clone() clone()
 * @method phpQueryObject empty() empty()
 * @method phpQueryObject next() next($selector = null)
 * @method phpQueryObject prev() prev($selector = null)
 * @property Int $length
 */
class phpQueryObject
    implements Iterator, Countable, ArrayAccess {
    public $documentID = null;
    /**
     * DOMDocument class.
     *
     * @var DOMDocument
     */
    public $document = null;
    public $charset = null;
    /**
     *
     * @var DOMDocumentWrapper
     */
    public $documentWrapper = null;
    /**
     * XPath interface.
     *
     * @var DOMXPath
     */
    public $xpath = null;
    /**
     * Stack of selected elements.
     * @TODO refactor to ->nodes
     * @var array
     */
    public $elements = array();
    /**
     * @access private
     */
    protected $elementsBackup = array();
    /**
     * @access private
     */
    protected $previous = null;
    /**
     * @access private
     * @TODO deprecate
     */
    protected $root = array();
    /**
     * Indicated if doument is just a fragment (no <html> tag).
     *
     * Every document is realy a full document, so even documentFragments can
     * be queried against <html>, but getDocument(id)->htmlOuter() will return
     * only contents of <body>.
     *
     * @var bool
     */
    public $documentFragment = true;
    /**
     * Iterator interface helper
     * @access private
     */
    protected $elementsInterator = array();
    /**
     * Iterator interface helper
     * @access private
     */
    protected $valid = false;
    /**
     * Iterator interface helper
     * @access private
     */
    protected $current = null;
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function __construct($documentID) {
//      if ($documentID instanceof self)
//          var_dump($documentID->getDocumentID());
        $id = $documentID instanceof self
            ? $documentID->getDocumentID()
            : $documentID;
//      var_dump($id);
        if (! isset(phpQuery::$documents[$id] )) {
//          var_dump(phpQuery::$documents);
            throw new Exception("Document with ID '{$id}' isn't loaded. Use phpQuery::newDocument(\$html) or phpQuery::newDocumentFile(\$file) first.");
        }
        $this->documentID = $id;
        $this->documentWrapper =& phpQuery::$documents[$id];
        $this->document =& $this->documentWrapper->document;
        $this->xpath =& $this->documentWrapper->xpath;
        $this->charset =& $this->documentWrapper->charset;
        $this->documentFragment =& $this->documentWrapper->isDocumentFragment;
        // TODO check $this->DOM->documentElement;
//      $this->root = $this->document->documentElement;
        $this->root =& $this->documentWrapper->root;
//      $this->toRoot();
        $this->elements = array($this->root);
    }
    /**
     *
     * @access private
     * @param $attr
     * @return unknown_type
     */
    public function __get($attr) {
        switch($attr) {
            // FIXME doesnt work at all ?
            case 'length':
                return $this->size();
            break;
            default:
                return $this->$attr;
        }
    }
    /**
     * Saves actual object to $var by reference.
     * Useful when need to break chain.
     * @param phpQueryObject $var
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function toReference(&$var) {
        return $var = $this;
    }
    public function documentFragment($state = null) {
        if ($state) {
            phpQuery::$documents[$this->getDocumentID()]['documentFragment'] = $state;
            return $this;
        }
        return $this->documentFragment;
    }
    /**
   * @access private
   * @TODO documentWrapper
     */
    protected function isRoot( $node) {
//      return $node instanceof DOMDOCUMENT || $node->tagName == 'html';
        return $node instanceof DOMDOCUMENT
            || ($node instanceof DOMELEMENT && $node->tagName == 'html')
            || $this->root->isSameNode($node);
    }
    /**
   * @access private
     */
    protected function stackIsRoot() {
        return $this->size() == 1 && $this->isRoot($this->elements[0]);
    }
    /**
     * Enter description here...
     * NON JQUERY METHOD
     *
     * Watch out, it doesn't creates new instance, can be reverted with end().
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function toRoot() {
        $this->elements = array($this->root);
        return $this;
//      return $this->newInstance(array($this->root));
    }
    /**
     * Saves object's DocumentID to $var by reference.
     * <code>
     * $myDocumentId;
     * phpQuery::newDocument('<div/>')
     *     ->getDocumentIDRef($myDocumentId)
     *     ->find('div')->...
     * </code>
     *
     * @param unknown_type $domId
     * @see phpQuery::newDocument
     * @see phpQuery::newDocumentFile
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function getDocumentIDRef(&$documentID) {
        $documentID = $this->getDocumentID();
        return $this;
    }
    /**
     * Returns object with stack set to document root.
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function getDocument() {
        return phpQuery::getDocument($this->getDocumentID());
    }
    /**
     *
     * @return DOMDocument
     */
    public function getDOMDocument() {
        return $this->document;
    }
    /**
     * Get object's Document ID.
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function getDocumentID() {
        return $this->documentID;
    }
    /**
     * Unloads whole document from memory.
     * CAUTION! None further operations will be possible on this document.
     * All objects refering to it will be useless.
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function unloadDocument() {
        phpQuery::unloadDocuments($this->getDocumentID());
    }
    public function isHTML() {
        return $this->documentWrapper->isHTML;
    }
    public function isXHTML() {
        return $this->documentWrapper->isXHTML;
    }
    public function isXML() {
        return $this->documentWrapper->isXML;
    }
    /**
     * Enter description here...
     *
     * @link http://docs.jquery.com/Ajax/serialize
     * @return string
     */
    public function serialize() {
        return phpQuery::param($this->serializeArray());
    }
    /**
     * Enter description here...
     *
     * @link http://docs.jquery.com/Ajax/serializeArray
     * @return array
     */
    public function serializeArray($submit = null) {
        $source = $this->filter('form, input, select, textarea')
            ->find('input, select, textarea')
            ->andSelf()
            ->not('form');
        $return = array();
//      $source->dumpDie();
        foreach($source as $input) {
            $input = phpQuery::pq($input);
            if ($input->is('[disabled]'))
                continue;
            if (!$input->is('[name]'))
                continue;
            if ($input->is('[type=checkbox]') && !$input->is('[checked]'))
                continue;
            // jquery diff
            if ($submit && $input->is('[type=submit]')) {
                if ($submit instanceof DOMELEMENT && ! $input->elements[0]->isSameNode($submit))
                    continue;
                else if (is_string($submit) && $input->attr('name') != $submit)
                    continue;
            }
            $return[] = array(
                'name' => $input->attr('name'),
                'value' => $input->val(),
            );
        }
        return $return;
    }
    /**
     * @access private
     */
    protected function debug($in) {
        if (! phpQuery::$debug )
            return;
        print('<pre>');
        print_r($in);
        // file debug
//      file_put_contents(dirname(__FILE__).'/phpQuery.log', print_r($in, true)."\n", FILE_APPEND);
        // quite handy debug trace
//      if ( is_array($in))
//          print_r(array_slice(debug_backtrace(), 3));
        print("</pre>\n");
    }
    /**
     * @access private
     */
    protected function isRegexp($pattern) {
        return in_array(
            $pattern[ mb_strlen($pattern)-1 ],
            array('^','*','$')
        );
    }
    /**
     * Determines if $char is really a char.
     *
     * @param string $char
     * @return bool
     * @todo rewrite me to charcode range ! ;)
     * @access private
     */
    protected function isChar($char) {
        return extension_loaded('mbstring') && phpQuery::$mbstringSupport
            ? mb_eregi('\w', $char)
            : preg_match('@\w@', $char);
    }
    /**
     * @access private
     */
    protected function parseSelector($query) {
        // clean spaces
        // TODO include this inside parsing ?
        $query = trim(
            preg_replace('@\s+@', ' ',
                preg_replace('@\s*(>|\\+|~)\s*@', '\\1', $query)
            )
        );
        $queries = array(array());
        if (! $query)
            return $queries;
        $return =& $queries[0];
        $specialChars = array('>',' ');
//      $specialCharsMapping = array('/' => '>');
        $specialCharsMapping = array();
        $strlen = mb_strlen($query);
        $classChars = array('.', '-');
        $pseudoChars = array('-');
        $tagChars = array('*', '|', '-');
        // split multibyte string
        // http://code.google.com/p/phpquery/issues/detail?id=76
        $_query = array();
        for ($i=0; $i<$strlen; $i++)
            $_query[] = mb_substr($query, $i, 1);
        $query = $_query;
        // it works, but i dont like it...
        $i = 0;
        while( $i < $strlen) {
            $c = $query[$i];
            $tmp = '';
            // TAG
            if ($this->isChar($c) || in_array($c, $tagChars)) {
                while(isset($query[$i])
                    && ($this->isChar($query[$i]) || in_array($query[$i], $tagChars))) {
                    $tmp .= $query[$i];
                    $i++;
                }
                $return[] = $tmp;
            // IDs
            } else if ( $c == '#') {
                $i++;
                while( isset($query[$i]) && ($this->isChar($query[$i]) || $query[$i] == '-')) {
                    $tmp .= $query[$i];
                    $i++;
                }
                $return[] = '#'.$tmp;
            // SPECIAL CHARS
            } else if (in_array($c, $specialChars)) {
                $return[] = $c;
                $i++;
            // MAPPED SPECIAL MULTICHARS
//          } else if ( $c.$query[$i+1] == '//') {
//              $return[] = ' ';
//              $i = $i+2;
            // MAPPED SPECIAL CHARS
            } else if ( isset($specialCharsMapping[$c])) {
                $return[] = $specialCharsMapping[$c];
                $i++;
            // COMMA
            } else if ( $c == ',') {
                $queries[] = array();
                $return =& $queries[ count($queries)-1 ];
                $i++;
                while( isset($query[$i]) && $query[$i] == ' ')
                    $i++;
            // CLASSES
            } else if ($c == '.') {
                while( isset($query[$i]) && ($this->isChar($query[$i]) || in_array($query[$i], $classChars))) {
                    $tmp .= $query[$i];
                    $i++;
                }
                $return[] = $tmp;
            // ~ General Sibling Selector
            } else if ($c == '~') {
                $spaceAllowed = true;
                $tmp .= $query[$i++];
                while( isset($query[$i])
                    && ($this->isChar($query[$i])
                        || in_array($query[$i], $classChars)
                        || $query[$i] == '*'
                        || ($query[$i] == ' ' && $spaceAllowed)
                    )) {
                    if ($query[$i] != ' ')
                        $spaceAllowed = false;
                    $tmp .= $query[$i];
                    $i++;
                }
                $return[] = $tmp;
            // + Adjacent sibling selectors
            } else if ($c == '+') {
                $spaceAllowed = true;
                $tmp .= $query[$i++];
                while( isset($query[$i])
                    && ($this->isChar($query[$i])
                        || in_array($query[$i], $classChars)
                        || $query[$i] == '*'
                        || ($spaceAllowed && $query[$i] == ' ')
                    )) {
                    if ($query[$i] != ' ')
                        $spaceAllowed = false;
                    $tmp .= $query[$i];
                    $i++;
                }
                $return[] = $tmp;
            // ATTRS
            } else if ($c == '[') {
                $stack = 1;
                $tmp .= $c;
                while( isset($query[++$i])) {
                    $tmp .= $query[$i];
                    if ( $query[$i] == '[') {
                        $stack++;
                    } else if ( $query[$i] == ']') {
                        $stack--;
                        if (! $stack )
                            break;
                    }
                }
                $return[] = $tmp;
                $i++;
            // PSEUDO CLASSES
            } else if ($c == ':') {
                $stack = 1;
                $tmp .= $query[$i++];
                while( isset($query[$i]) && ($this->isChar($query[$i]) || in_array($query[$i], $pseudoChars))) {
                    $tmp .= $query[$i];
                    $i++;
                }
                // with arguments ?
                if ( isset($query[$i]) && $query[$i] == '(') {
                    $tmp .= $query[$i];
                    $stack = 1;
                    while( isset($query[++$i])) {
                        $tmp .= $query[$i];
                        if ( $query[$i] == '(') {
                            $stack++;
                        } else if ( $query[$i] == ')') {
                            $stack--;
                            if (! $stack )
                                break;
                        }
                    }
                    $return[] = $tmp;
                    $i++;
                } else {
                    $return[] = $tmp;
                }
            } else {
                $i++;
            }
        }
        foreach($queries as $k => $q) {
            if (isset($q[0])) {
                if (isset($q[0][0]) && $q[0][0] == ':')
                    array_unshift($queries[$k], '*');
                if ($q[0] != '>')
                    array_unshift($queries[$k], ' ');
            }
        }
        return $queries;
    }
    /**
     * Return matched DOM nodes.
     *
     * @param int $index
     * @return array|DOMElement Single DOMElement or array of DOMElement.
     */
    public function get($index = null, $callback1 = null, $callback2 = null, $callback3 = null) {
        $return = isset($index)
            ? (isset($this->elements[$index]) ? $this->elements[$index] : null)
            : $this->elements;
        // pass thou callbacks
        $args = func_get_args();
        $args = array_slice($args, 1);
        foreach($args as $callback) {
            if (is_array($return))
                foreach($return as $k => $v)
                    $return[$k] = phpQuery::callbackRun($callback, array($v));
            else
                $return = phpQuery::callbackRun($callback, array($return));
        }
        return $return;
    }
    /**
     * Return matched DOM nodes.
     * jQuery difference.
     *
     * @param int $index
     * @return array|string Returns string if $index != null
     * @todo implement callbacks
     * @todo return only arrays ?
     * @todo maybe other name...
     */
    public function getString($index = null, $callback1 = null, $callback2 = null, $callback3 = null) {
        if ($index)
            $return = $this->eq($index)->text();
        else {
            $return = array();
            for($i = 0; $i < $this->size(); $i++) {
                $return[] = $this->eq($i)->text();
            }
        }
        // pass thou callbacks
        $args = func_get_args();
        $args = array_slice($args, 1);
        foreach($args as $callback) {
            $return = phpQuery::callbackRun($callback, array($return));
        }
        return $return;
    }
    /**
     * Return matched DOM nodes.
     * jQuery difference.
     *
     * @param int $index
     * @return array|string Returns string if $index != null
     * @todo implement callbacks
     * @todo return only arrays ?
     * @todo maybe other name...
     */
    public function getStrings($index = null, $callback1 = null, $callback2 = null, $callback3 = null) {
        if ($index)
            $return = $this->eq($index)->text();
        else {
            $return = array();
            for($i = 0; $i < $this->size(); $i++) {
                $return[] = $this->eq($i)->text();
            }
            // pass thou callbacks
            $args = func_get_args();
            $args = array_slice($args, 1);
        }
        foreach($args as $callback) {
            if (is_array($return))
                foreach($return as $k => $v)
                    $return[$k] = phpQuery::callbackRun($callback, array($v));
            else
                $return = phpQuery::callbackRun($callback, array($return));
        }
        return $return;
    }
    /**
     * Returns new instance of actual class.
     *
     * @param array $newStack Optional. Will replace old stack with new and move old one to history.c
     */
    public function newInstance($newStack = null) {
        $class = get_class($this);
        // support inheritance by passing old object to overloaded constructor
        $new = $class != 'phpQuery'
            ? new $class($this, $this->getDocumentID())
            : new phpQueryObject($this->getDocumentID());
        $new->previous = $this;
        if (is_null($newStack)) {
            $new->elements = $this->elements;
            if ($this->elementsBackup)
                $this->elements = $this->elementsBackup;
        } else if (is_string($newStack)) {
            $new->elements = phpQuery::pq($newStack, $this->getDocumentID())->stack();
        } else {
            $new->elements = $newStack;
        }
        return $new;
    }
    /**
     * Enter description here...
     *
     * In the future, when PHP will support XLS 2.0, then we would do that this way:
     * contains(tokenize(@class, '\s'), "something")
     * @param unknown_type $class
     * @param unknown_type $node
     * @return boolean
     * @access private
     */
    protected function matchClasses($class, $node) {
        // multi-class
        if ( mb_strpos($class, '.', 1)) {
            $classes = explode('.', substr($class, 1));
            $classesCount = count( $classes );
            $nodeClasses = explode(' ', $node->getAttribute('class') );
            $nodeClassesCount = count( $nodeClasses );
            if ( $classesCount > $nodeClassesCount )
                return false;
            $diff = count(
                array_diff(
                    $classes,
                    $nodeClasses
                )
            );
            if (! $diff )
                return true;
        // single-class
        } else {
            return in_array(
                // strip leading dot from class name
                substr($class, 1),
                // get classes for element as array
                explode(' ', $node->getAttribute('class') )
            );
        }
    }
    /**
     * @access private
     */
    protected function runQuery($XQuery, $selector = null, $compare = null) {
        if ($compare && ! method_exists($this, $compare))
            return false;
        $stack = array();
        if (! $this->elements)
            $this->debug('Stack empty, skipping...');
//      var_dump($this->elements[0]->nodeType);
        // element, document
        foreach($this->stack(array(1, 9, 13)) as $k => $stackNode) {
            $detachAfter = false;
            // to work on detached nodes we need temporary place them somewhere
            // thats because context xpath queries sucks ;]
            $testNode = $stackNode;
            while ($testNode) {
                if (! $testNode->parentNode && ! $this->isRoot($testNode)) {
                    $this->root->appendChild($testNode);
                    $detachAfter = $testNode;
                    break;
                }
                $testNode = isset($testNode->parentNode)
                    ? $testNode->parentNode
                    : null;
            }
            // XXX tmp ?
            $xpath = $this->documentWrapper->isXHTML
                ? $this->getNodeXpath($stackNode, 'html')
                : $this->getNodeXpath($stackNode);
            // FIXME pseudoclasses-only query, support XML
            $query = $XQuery == '//' && $xpath == '/html[1]'
                ? '//*'
                : $xpath.$XQuery;
            $this->debug("XPATH: {$query}");
            // run query, get elements
            $nodes = $this->xpath->query($query);
            $this->debug("QUERY FETCHED");
            if (! $nodes->length )
                $this->debug('Nothing found');
            $debug = array();
            foreach($nodes as $node) {
                $matched = false;
                if ( $compare) {
                    phpQuery::$debug ?
                        $this->debug("Found: ".$this->whois( $node ).", comparing with {$compare}()")
                        : null;
                    $phpQueryDebug = phpQuery::$debug;
                    phpQuery::$debug = false;
                    // TODO ??? use phpQuery::callbackRun()
                    if (call_user_func_array(array($this, $compare), array($selector, $node)))
                        $matched = true;
                    phpQuery::$debug = $phpQueryDebug;
                } else {
                    $matched = true;
                }
                if ( $matched) {
                    if (phpQuery::$debug)
                        $debug[] = $this->whois( $node );
                    $stack[] = $node;
                }
            }
            if (phpQuery::$debug) {
                $this->debug("Matched ".count($debug).": ".implode(', ', $debug));
            }
            if ($detachAfter)
                $this->root->removeChild($detachAfter);
        }
        $this->elements = $stack;
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function find($selectors, $context = null, $noHistory = false) {
        if (!$noHistory)
            // backup last stack /for end()/
            $this->elementsBackup = $this->elements;
        // allow to define context
        // TODO combine code below with phpQuery::pq() context guessing code
        //   as generic function
        if ($context) {
            if (! is_array($context) && $context instanceof DOMELEMENT)
                $this->elements = array($context);
            else if (is_array($context)) {
                $this->elements = array();
                foreach ($context as $c)
                    if ($c instanceof DOMELEMENT)
                        $this->elements[] = $c;
            } else if ( $context instanceof self )
                $this->elements = $context->elements;
        }
        $queries = $this->parseSelector($selectors);
        $this->debug(array('FIND', $selectors, $queries));
        $XQuery = '';
        // remember stack state because of multi-queries
        $oldStack = $this->elements;
        // here we will be keeping found elements
        $stack = array();
        foreach($queries as $selector) {
            $this->elements = $oldStack;
            $delimiterBefore = false;
            foreach($selector as $s) {
                // TAG
                $isTag = extension_loaded('mbstring') && phpQuery::$mbstringSupport
                    ? mb_ereg_match('^[\w|\||-]+$', $s) || $s == '*'
                    : preg_match('@^[\w|\||-]+$@', $s) || $s == '*';
                if ($isTag) {
                    if ($this->isXML()) {
                        // namespace support
                        if (mb_strpos($s, '|') !== false) {
                            $ns = $tag = null;
                            list($ns, $tag) = explode('|', $s);
                            $XQuery .= "$ns:$tag";
                        } else if ($s == '*') {
                            $XQuery .= "*";
                        } else {
                            $XQuery .= "*[local-name()='$s']";
                        }
                    } else {
                        $XQuery .= $s;
                    }
                // ID
                } else if ($s[0] == '#') {
                    if ($delimiterBefore)
                        $XQuery .= '*';
                    $XQuery .= "[@id='".substr($s, 1)."']";
                // ATTRIBUTES
                } else if ($s[0] == '[') {
                    if ($delimiterBefore)
                        $XQuery .= '*';
                    // strip side brackets
                    $attr = trim($s, '][');
                    $execute = false;
                    // attr with specifed value
                    if (mb_strpos($s, '=')) {
                        $value = null;
                        list($attr, $value) = explode('=', $attr);
                        $value = trim($value, "'\"");
                        if ($this->isRegexp($attr)) {
                            // cut regexp character
                            $attr = substr($attr, 0, -1);
                            $execute = true;
                            $XQuery .= "[@{$attr}]";
                        } else {
                            $XQuery .= "[@{$attr}='{$value}']";
                        }
                    // attr without specified value
                    } else {
                        $XQuery .= "[@{$attr}]";
                    }
                    if ($execute) {
                        $this->runQuery($XQuery, $s, 'is');
                        $XQuery = '';
                        if (! $this->length())
                            break;
                    }
                // CLASSES
                } else if ($s[0] == '.') {
                    // TODO use return $this->find("./self::*[contains(concat(\" \",@class,\" \"), \" $class \")]");
                    // thx wizDom ;)
                    if ($delimiterBefore)
                        $XQuery .= '*';
                    $XQuery .= '[@class]';
                    $this->runQuery($XQuery, $s, 'matchClasses');
                    $XQuery = '';
                    if (! $this->length() )
                        break;
                // ~ General Sibling Selector
                } else if ($s[0] == '~') {
                    $this->runQuery($XQuery);
                    $XQuery = '';
                    $this->elements = $this
                        ->siblings(
                            substr($s, 1)
                        )->elements;
                    if (! $this->length() )
                        break;
                // + Adjacent sibling selectors
                } else if ($s[0] == '+') {
                    // TODO /following-sibling::
                    $this->runQuery($XQuery);
                    $XQuery = '';
                    $subSelector = substr($s, 1);
                    $subElements = $this->elements;
                    $this->elements = array();
                    foreach($subElements as $node) {
                        // search first DOMElement sibling
                        $test = $node->nextSibling;
                        while($test && ! ($test instanceof DOMELEMENT))
                            $test = $test->nextSibling;
                        if ($test && $this->is($subSelector, $test))
                            $this->elements[] = $test;
                    }
                    if (! $this->length() )
                        break;
                // PSEUDO CLASSES
                } else if ($s[0] == ':') {
                    // TODO optimization for :first :last
                    if ($XQuery) {
                        $this->runQuery($XQuery);
                        $XQuery = '';
                    }
                    if (! $this->length())
                        break;
                    $this->pseudoClasses($s);
                    if (! $this->length())
                        break;
                // DIRECT DESCENDANDS
                } else if ($s == '>') {
                    $XQuery .= '/';
                    $delimiterBefore = 2;
                // ALL DESCENDANDS
                } else if ($s == ' ') {
                    $XQuery .= '//';
                    $delimiterBefore = 2;
                // ERRORS
                } else {
                    phpQuery::debug("Unrecognized token '$s'");
                }
                $delimiterBefore = $delimiterBefore === 2;
            }
            // run query if any
            if ($XQuery && $XQuery != '//') {
                $this->runQuery($XQuery);
                $XQuery = '';
            }
            foreach($this->elements as $node)
                if (! $this->elementsContainsNode($node, $stack))
                    $stack[] = $node;
        }
        $this->elements = $stack;
        return $this->newInstance();
    }
    /**
     * @todo create API for classes with pseudoselectors
     * @access private
     */
    protected function pseudoClasses($class) {
        // TODO clean args parsing ?
        $class = ltrim($class, ':');
        $haveArgs = mb_strpos($class, '(');
        if ($haveArgs !== false) {
            $args = substr($class, $haveArgs+1, -1);
            $class = substr($class, 0, $haveArgs);
        }
        switch($class) {
            case 'even':
            case 'odd':
                $stack = array();
                foreach($this->elements as $i => $node) {
                    if ($class == 'even' && ($i%2) == 0)
                        $stack[] = $node;
                    else if ( $class == 'odd' && $i % 2 )
                        $stack[] = $node;
                }
                $this->elements = $stack;
                break;
            case 'eq':
                $k = intval($args);
                $this->elements = isset( $this->elements[$k] )
                    ? array( $this->elements[$k] )
                    : array();
                break;
            case 'gt':
                $this->elements = array_slice($this->elements, $args+1);
                break;
            case 'lt':
                $this->elements = array_slice($this->elements, 0, $args+1);
                break;
            case 'first':
                if (isset($this->elements[0]))
                    $this->elements = array($this->elements[0]);
                break;
            case 'last':
                if ($this->elements)
                    $this->elements = array($this->elements[count($this->elements)-1]);
                break;
            /*case 'parent':
                $stack = array();
                foreach($this->elements as $node) {
                    if ( $node->childNodes->length )
                        $stack[] = $node;
                }
                $this->elements = $stack;
                break;*/
            case 'contains':
                $text = trim($args, "\"'");
                $stack = array();
                foreach($this->elements as $node) {
                    if (mb_stripos($node->textContent, $text) === false)
                        continue;
                    $stack[] = $node;
                }
                $this->elements = $stack;
                break;
            case 'not':
                $selector = self::unQuote($args);
                $this->elements = $this->not($selector)->stack();
                break;
            case 'slice':
                // TODO jQuery difference ?
                $args = explode(',',
                    str_replace(', ', ',', trim($args, "\"'"))
                );
                $start = $args[0];
                $end = isset($args[1])
                    ? $args[1]
                    : null;
                if ($end > 0)
                    $end = $end-$start;
                $this->elements = array_slice($this->elements, $start, $end);
                break;
            case 'has':
                $selector = trim($args, "\"'");
                $stack = array();
                foreach($this->stack(1) as $el) {
                    if ($this->find($selector, $el, true)->length)
                        $stack[] = $el;
                }
                $this->elements = $stack;
                break;
            case 'submit':
            case 'reset':
                $this->elements = phpQuery::merge(
                    $this->map(array($this, 'is'),
                        "input[type=$class]", new CallbackParam()
                    ),
                    $this->map(array($this, 'is'),
                        "button[type=$class]", new CallbackParam()
                    )
                );
            break;
//              $stack = array();
//              foreach($this->elements as $node)
//                  if ($node->is('input[type=submit]') || $node->is('button[type=submit]'))
//                      $stack[] = $el;
//              $this->elements = $stack;
            case 'input':
                $this->elements = $this->map(
                    array($this, 'is'),
                    'input', new CallbackParam()
                )->elements;
            break;
            case 'password':
            case 'checkbox':
            case 'radio':
            case 'hidden':
            case 'image':
            case 'file':
                $this->elements = $this->map(
                    array($this, 'is'),
                    "input[type=$class]", new CallbackParam()
                )->elements;
            break;
            case 'parent':
                $this->elements = $this->map(
                    create_function('$node', '
                        return $node instanceof DOMELEMENT && $node->childNodes->length
                            ? $node : null;')
                )->elements;
            break;
            case 'empty':
                $this->elements = $this->map(
                    create_function('$node', '
                        return $node instanceof DOMELEMENT && $node->childNodes->length
                            ? null : $node;')
                )->elements;
            break;
            case 'disabled':
            case 'selected':
            case 'checked':
                $this->elements = $this->map(
                    array($this, 'is'),
                    "[$class]", new CallbackParam()
                )->elements;
            break;
            case 'enabled':
                $this->elements = $this->map(
                    create_function('$node', '
                        return pq($node)->not(":disabled") ? $node : null;')
                )->elements;
            break;
            case 'header':
                $this->elements = $this->map(
                    create_function('$node',
                        '$isHeader = isset($node->tagName) && in_array($node->tagName, array(
                            "h1", "h2", "h3", "h4", "h5", "h6", "h7"
                        ));
                        return $isHeader
                            ? $node
                            : null;')
                )->elements;
//              $this->elements = $this->map(
//                  create_function('$node', '$node = pq($node);
//                      return $node->is("h1")
//                          || $node->is("h2")
//                          || $node->is("h3")
//                          || $node->is("h4")
//                          || $node->is("h5")
//                          || $node->is("h6")
//                          || $node->is("h7")
//                          ? $node
//                          : null;')
//              )->elements;
            break;
            case 'only-child':
                $this->elements = $this->map(
                    create_function('$node',
                        'return pq($node)->siblings()->size() == 0 ? $node : null;')
                )->elements;
            break;
            case 'first-child':
                $this->elements = $this->map(
                    create_function('$node', 'return pq($node)->prevAll()->size() == 0 ? $node : null;')
                )->elements;
            break;
            case 'last-child':
                $this->elements = $this->map(
                    create_function('$node', 'return pq($node)->nextAll()->size() == 0 ? $node : null;')
                )->elements;
            break;
            case 'nth-child':
                $param = trim($args, "\"'");
                if (! $param)
                    break;
                    // nth-child(n+b) to nth-child(1n+b)
                if ($param{0} == 'n')
                    $param = '1'.$param;
                // :nth-child(index/even/odd/equation)
                if ($param == 'even' || $param == 'odd')
                    $mapped = $this->map(
                        create_function('$node, $param',
                            '$index = pq($node)->prevAll()->size()+1;
                            if ($param == "even" && ($index%2) == 0)
                                return $node;
                            else if ($param == "odd" && $index%2 == 1)
                                return $node;
                            else
                                return null;'),
                        new CallbackParam(), $param
                    );
                else if (mb_strlen($param) > 1 && $param{1} == 'n')
                    // an+b
                    $mapped = $this->map(
                        create_function('$node, $param',
                            '$prevs = pq($node)->prevAll()->size();
                            $index = 1+$prevs;
                            $b = mb_strlen($param) > 3
                                ? $param{3}
                                : 0;
                            $a = $param{0};
                            if ($b && $param{2} == "-")
                                $b = -$b;
                            if ($a > 0) {
                                return ($index-$b)%$a == 0
                                    ? $node
                                    : null;
                                phpQuery::debug($a."*".floor($index/$a)."+$b-1 == ".($a*floor($index/$a)+$b-1)." ?= $prevs");
                                return $a*floor($index/$a)+$b-1 == $prevs
                                        ? $node
                                        : null;
                            } else if ($a == 0)
                                return $index == $b
                                        ? $node
                                        : null;
                            else
                                // negative value
                                return $index <= $b
                                        ? $node
                                        : null;
//                          if (! $b)
//                              return $index%$a == 0
//                                  ? $node
//                                  : null;
//                          else
//                              return ($index-$b)%$a == 0
//                                  ? $node
//                                  : null;
                            '),
                        new CallbackParam(), $param
                    );
                else
                    // index
                    $mapped = $this->map(
                        create_function('$node, $index',
                            '$prevs = pq($node)->prevAll()->size();
                            if ($prevs && $prevs == $index-1)
                                return $node;
                            else if (! $prevs && $index == 1)
                                return $node;
                            else
                                return null;'),
                        new CallbackParam(), $param
                    );
                $this->elements = $mapped->elements;
            break;
            default:
                $this->debug("Unknown pseudoclass '{$class}', skipping...");
        }
    }
    /**
     * @access private
     */
    protected function __pseudoClassParam($paramsString) {
        // TODO;
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function is($selector, $nodes = null) {
        phpQuery::debug(array("Is:", $selector));
        if (! $selector)
            return false;
        $oldStack = $this->elements;
        $returnArray = false;
        if ($nodes && is_array($nodes)) {
            $this->elements = $nodes;
        } else if ($nodes)
            $this->elements = array($nodes);
        $this->filter($selector, true);
        $stack = $this->elements;
        $this->elements = $oldStack;
        if ($nodes)
            return $stack ? $stack : null;
        return (bool)count($stack);
    }
    /**
     * Enter description here...
     * jQuery difference.
     *
     * Callback:
     * - $index int
     * - $node DOMNode
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @link http://docs.jquery.com/Traversing/filter
     */
    public function filterCallback($callback, $_skipHistory = false) {
        if (! $_skipHistory) {
            $this->elementsBackup = $this->elements;
            $this->debug("Filtering by callback");
        }
        $newStack = array();
        foreach($this->elements as $index => $node) {
            $result = phpQuery::callbackRun($callback, array($index, $node));
            if (is_null($result) || (! is_null($result) && $result))
                $newStack[] = $node;
        }
        $this->elements = $newStack;
        return $_skipHistory
            ? $this
            : $this->newInstance();
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @link http://docs.jquery.com/Traversing/filter
     */
    public function filter($selectors, $_skipHistory = false) {
        if ($selectors instanceof Callback OR $selectors instanceof Closure)
            return $this->filterCallback($selectors, $_skipHistory);
        if (! $_skipHistory)
            $this->elementsBackup = $this->elements;
        $notSimpleSelector = array(' ', '>', '~', '+', '/');
        if (! is_array($selectors))
            $selectors = $this->parseSelector($selectors);
        if (! $_skipHistory)
            $this->debug(array("Filtering:", $selectors));
        $finalStack = array();
        foreach($selectors as $selector) {
            $stack = array();
            if (! $selector)
                break;
            // avoid first space or /
            if (in_array($selector[0], $notSimpleSelector))
                $selector = array_slice($selector, 1);
            // PER NODE selector chunks
            foreach($this->stack() as $node) {
                $break = false;
                foreach($selector as $s) {
                    if (!($node instanceof DOMELEMENT)) {
                        // all besides DOMElement
                        if ( $s[0] == '[') {
                            $attr = trim($s, '[]');
                            if ( mb_strpos($attr, '=')) {
                                list( $attr, $val ) = explode('=', $attr);
                                if ($attr == 'nodeType' && $node->nodeType != $val)
                                    $break = true;
                            }
                        } else
                            $break = true;
                    } else {
                        // DOMElement only
                        // ID
                        if ( $s[0] == '#') {
                            if ( $node->getAttribute('id') != substr($s, 1) )
                                $break = true;
                        // CLASSES
                        } else if ( $s[0] == '.') {
                            if (! $this->matchClasses( $s, $node ) )
                                $break = true;
                        // ATTRS
                        } else if ( $s[0] == '[') {
                            // strip side brackets
                            $attr = trim($s, '[]');
                            if (mb_strpos($attr, '=')) {
                                list($attr, $val) = explode('=', $attr);
                                $val = self::unQuote($val);
                                if ($attr == 'nodeType') {
                                    if ($val != $node->nodeType)
                                        $break = true;
                                } else if ($this->isRegexp($attr)) {
                                    $val = extension_loaded('mbstring') && phpQuery::$mbstringSupport
                                        ? quotemeta(trim($val, '"\''))
                                        : preg_quote(trim($val, '"\''), '@');
                                    // switch last character
                                    switch( substr($attr, -1)) {
                                        // quotemeta used insted of preg_quote
                                        // http://code.google.com/p/phpquery/issues/detail?id=76
                                        case '^':
                                            $pattern = '^'.$val;
                                            break;
                                        case '*':
                                            $pattern = '.*'.$val.'.*';
                                            break;
                                        case '$':
                                            $pattern = '.*'.$val.'$';
                                            break;
                                    }
                                    // cut last character
                                    $attr = substr($attr, 0, -1);
                                    $isMatch = extension_loaded('mbstring') && phpQuery::$mbstringSupport
                                        ? mb_ereg_match($pattern, $node->getAttribute($attr))
                                        : preg_match("@{$pattern}@", $node->getAttribute($attr));
                                    if (! $isMatch)
                                        $break = true;
                                } else if ($node->getAttribute($attr) != $val)
                                    $break = true;
                            } else if (! $node->hasAttribute($attr))
                                $break = true;
                        // PSEUDO CLASSES
                        } else if ( $s[0] == ':') {
                            // skip
                        // TAG
                        } else if (trim($s)) {
                            if ($s != '*') {
                                // TODO namespaces
                                if (isset($node->tagName)) {
                                    if ($node->tagName != $s)
                                        $break = true;
                                } else if ($s == 'html' && ! $this->isRoot($node))
                                    $break = true;
                            }
                        // AVOID NON-SIMPLE SELECTORS
                        } else if (in_array($s, $notSimpleSelector)) {
                            $break = true;
                            $this->debug(array('Skipping non simple selector', $selector));
                        }
                    }
                    if ($break)
                        break;
                }
                // if element passed all chunks of selector - add it to new stack
                if (! $break )
                    $stack[] = $node;
            }
            $tmpStack = $this->elements;
            $this->elements = $stack;
            // PER ALL NODES selector chunks
            foreach($selector as $s)
                // PSEUDO CLASSES
                if ($s[0] == ':')
                    $this->pseudoClasses($s);
            foreach($this->elements as $node)
                // XXX it should be merged without duplicates
                // but jQuery doesnt do that
                $finalStack[] = $node;
            $this->elements = $tmpStack;
        }
        $this->elements = $finalStack;
        if ($_skipHistory) {
            return $this;
        } else {
            $this->debug("Stack length after filter(): ".count($finalStack));
            return $this->newInstance();
        }
    }
    /**
     *
     * @param $value
     * @return unknown_type
     * @TODO implement in all methods using passed parameters
     */
    protected static function unQuote($value) {
        return $value[0] == '\'' || $value[0] == '"'
            ? substr($value, 1, -1)
            : $value;
    }
    /**
     * Enter description here...
     *
     * @link http://docs.jquery.com/Ajax/load
     * @return phpQuery|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @todo Support $selector
     */
    public function load($url, $data = null, $callback = null) {
        if ($data && ! is_array($data)) {
            $callback = $data;
            $data = null;
        }
        if (mb_strpos($url, ' ') !== false) {
            $matches = null;
            if (extension_loaded('mbstring') && phpQuery::$mbstringSupport)
                mb_ereg('^([^ ]+) (.*)$', $url, $matches);
            else
                preg_match('^([^ ]+) (.*)$', $url, $matches);
            $url = $matches[1];
            $selector = $matches[2];
            // FIXME this sucks, pass as callback param
            $this->_loadSelector = $selector;
        }
        $ajax = array(
            'url' => $url,
            'type' => $data ? 'POST' : 'GET',
            'data' => $data,
            'complete' => $callback,
            'success' => array($this, '__loadSuccess')
        );
        phpQuery::ajax($ajax);
        return $this;
    }
    /**
     * @access private
     * @param $html
     * @return unknown_type
     */
    public function __loadSuccess($html) {
        if ($this->_loadSelector) {
            $html = phpQuery::newDocument($html)->find($this->_loadSelector);
            unset($this->_loadSelector);
        }
        foreach($this->stack(1) as $node) {
            phpQuery::pq($node, $this->getDocumentID())
                ->markup($html);
        }
    }
    /**
     * Enter description here...
     *
     * @return phpQuery|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @todo
     */
    public function css() {
        // TODO
        return $this;
    }
    /**
     * @todo
     *
     */
    public function show(){
        // TODO
        return $this;
    }
    /**
     * @todo
     *
     */
    public function hide(){
        // TODO
        return $this;
    }
    /**
     * Trigger a type of event on every matched element.
     *
     * @param unknown_type $type
     * @param unknown_type $data
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @TODO support more than event in $type (space-separated)
     */
    public function trigger($type, $data = array()) {
        foreach($this->elements as $node)
            phpQueryEvents::trigger($this->getDocumentID(), $type, $data, $node);
        return $this;
    }
    /**
     * This particular method triggers all bound event handlers on an element (for a specific event type) WITHOUT executing the browsers default actions.
     *
     * @param unknown_type $type
     * @param unknown_type $data
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @TODO
     */
    public function triggerHandler($type, $data = array()) {
        // TODO;
    }
    /**
     * Binds a handler to one or more events (like click) for each matched element.
     * Can also bind custom events.
     *
     * @param unknown_type $type
     * @param unknown_type $data Optional
     * @param unknown_type $callback
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @TODO support '!' (exclusive) events
     * @TODO support more than event in $type (space-separated)
     */
    public function bind($type, $data, $callback = null) {
        // TODO check if $data is callable, not using is_callable
        if (! isset($callback)) {
            $callback = $data;
            $data = null;
        }
        foreach($this->elements as $node)
            phpQueryEvents::add($this->getDocumentID(), $node, $type, $data, $callback);
        return $this;
    }
    /**
     * Enter description here...
     *
     * @param unknown_type $type
     * @param unknown_type $callback
     * @return unknown
     * @TODO namespace events
     * @TODO support more than event in $type (space-separated)
     */
    public function unbind($type = null, $callback = null) {
        foreach($this->elements as $node)
            phpQueryEvents::remove($this->getDocumentID(), $node, $type, $callback);
        return $this;
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function change($callback = null) {
        if ($callback)
            return $this->bind('change', $callback);
        return $this->trigger('change');
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function submit($callback = null) {
        if ($callback)
            return $this->bind('submit', $callback);
        return $this->trigger('submit');
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function click($callback = null) {
        if ($callback)
            return $this->bind('click', $callback);
        return $this->trigger('click');
    }
    /**
     * Enter description here...
     *
     * @param String|phpQuery
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function wrapAllOld($wrapper) {
        $wrapper = pq($wrapper)->_clone();
        if (! $wrapper->length() || ! $this->length() )
            return $this;
        $wrapper->insertBefore($this->elements[0]);
        $deepest = $wrapper->elements[0];
        while($deepest->firstChild && $deepest->firstChild instanceof DOMELEMENT)
            $deepest = $deepest->firstChild;
        pq($deepest)->append($this);
        return $this;
    }
    /**
     * Enter description here...
     *
     * TODO testme...
     * @param String|phpQuery
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function wrapAll($wrapper) {
        if (! $this->length())
            return $this;
        return phpQuery::pq($wrapper, $this->getDocumentID())
            ->clone()
            ->insertBefore($this->get(0))
            ->map(array($this, '___wrapAllCallback'))
            ->append($this);
    }
  /**
   *
     * @param $node
     * @return unknown_type
     * @access private
   */
    public function ___wrapAllCallback($node) {
        $deepest = $node;
        while($deepest->firstChild && $deepest->firstChild instanceof DOMELEMENT)
            $deepest = $deepest->firstChild;
        return $deepest;
    }
    /**
     * Enter description here...
     * NON JQUERY METHOD
     *
     * @param String|phpQuery
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function wrapAllPHP($codeBefore, $codeAfter) {
        return $this
            ->slice(0, 1)
                ->beforePHP($codeBefore)
            ->end()
            ->slice(-1)
                ->afterPHP($codeAfter)
            ->end();
    }
    /**
     * Enter description here...
     *
     * @param String|phpQuery
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function wrap($wrapper) {
        foreach($this->stack() as $node)
            phpQuery::pq($node, $this->getDocumentID())->wrapAll($wrapper);
        return $this;
    }
    /**
     * Enter description here...
     *
     * @param String|phpQuery
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function wrapPHP($codeBefore, $codeAfter) {
        foreach($this->stack() as $node)
            phpQuery::pq($node, $this->getDocumentID())->wrapAllPHP($codeBefore, $codeAfter);
        return $this;
    }
    /**
     * Enter description here...
     *
     * @param String|phpQuery
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function wrapInner($wrapper) {
        foreach($this->stack() as $node)
            phpQuery::pq($node, $this->getDocumentID())->contents()->wrapAll($wrapper);
        return $this;
    }
    /**
     * Enter description here...
     *
     * @param String|phpQuery
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function wrapInnerPHP($codeBefore, $codeAfter) {
        foreach($this->stack(1) as $node)
            phpQuery::pq($node, $this->getDocumentID())->contents()
                ->wrapAllPHP($codeBefore, $codeAfter);
        return $this;
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @testme Support for text nodes
     */
    public function contents() {
        $stack = array();
        foreach($this->stack(1) as $el) {
            // FIXME (fixed) http://code.google.com/p/phpquery/issues/detail?id=56
//          if (! isset($el->childNodes))
//              continue;
            foreach($el->childNodes as $node) {
                $stack[] = $node;
            }
        }
        return $this->newInstance($stack);
    }
    /**
     * Enter description here...
     *
     * jQuery difference.
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function contentsUnwrap() {
        foreach($this->stack(1) as $node) {
            if (! $node->parentNode )
                continue;
            $childNodes = array();
            // any modification in DOM tree breaks childNodes iteration, so cache them first
            foreach($node->childNodes as $chNode )
                $childNodes[] = $chNode;
            foreach($childNodes as $chNode )
//              $node->parentNode->appendChild($chNode);
                $node->parentNode->insertBefore($chNode, $node);
            $node->parentNode->removeChild($node);
        }
        return $this;
    }
    /**
     * Enter description here...
     *
     * jQuery difference.
     */
    public function switchWith($markup) {
        $markup = pq($markup, $this->getDocumentID());
        $content = null;
        foreach($this->stack(1) as $node) {
            pq($node)
                ->contents()->toReference($content)->end()
                ->replaceWith($markup->clone()->append($content));
        }
        return $this;
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function eq($num) {
        $oldStack = $this->elements;
        $this->elementsBackup = $this->elements;
        $this->elements = array();
        if ( isset($oldStack[$num]) )
            $this->elements[] = $oldStack[$num];
        return $this->newInstance();
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function size() {
        return count($this->elements);
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @deprecated Use length as attribute
     */
    public function length() {
        return $this->size();
    }
    public function count() {
        return $this->size();
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @todo $level
     */
    public function end($level = 1) {
//      $this->elements = array_pop( $this->history );
//      return $this;
//      $this->previous->DOM = $this->DOM;
//      $this->previous->XPath = $this->XPath;
        return $this->previous
            ? $this->previous
            : $this;
    }
    /**
     * Enter description here...
     * Normal use ->clone() .
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @access private
     */
    public function _clone() {
        $newStack = array();
        //pr(array('copy... ', $this->whois()));
        //$this->dumpHistory('copy');
        $this->elementsBackup = $this->elements;
        foreach($this->elements as $node) {
            $newStack[] = $node->cloneNode(true);
        }
        $this->elements = $newStack;
        return $this->newInstance();
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function replaceWithPHP($code) {
        return $this->replaceWith(phpQuery::php($code));
    }
    /**
     * Enter description here...
     *
     * @param String|phpQuery $content
     * @link http://docs.jquery.com/Manipulation/replaceWith#content
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function replaceWith($content) {
        return $this->after($content)->remove();
    }
    /**
     * Enter description here...
     *
     * @param String $selector
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @todo this works ?
     */
    public function replaceAll($selector) {
        foreach(phpQuery::pq($selector, $this->getDocumentID()) as $node)
            phpQuery::pq($node, $this->getDocumentID())
                ->after($this->_clone())
                ->remove();
        return $this;
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function remove($selector = null) {
        $loop = $selector
            ? $this->filter($selector)->elements
            : $this->elements;
        foreach($loop as $node) {
            if (! $node->parentNode )
                continue;
            if (isset($node->tagName))
                $this->debug("Removing '{$node->tagName}'");
            $node->parentNode->removeChild($node);
            // Mutation event
            $event = new DOMEvent(array(
                'target' => $node,
                'type' => 'DOMNodeRemoved'
            ));
            phpQueryEvents::trigger($this->getDocumentID(),
                $event->type, array($event), $node
            );
        }
        return $this;
    }
    protected function markupEvents($newMarkup, $oldMarkup, $node) {
        if ($node->tagName == 'textarea' && $newMarkup != $oldMarkup) {
            $event = new DOMEvent(array(
                'target' => $node,
                'type' => 'change'
            ));
            phpQueryEvents::trigger($this->getDocumentID(),
                $event->type, array($event), $node
            );
        }
    }
    /**
     * jQuey difference
     *
     * @param $markup
     * @return unknown_type
     * @TODO trigger change event for textarea
     */
    public function markup($markup = null, $callback1 = null, $callback2 = null, $callback3 = null) {
        $args = func_get_args();
        if ($this->documentWrapper->isXML)
            return call_user_func_array(array($this, 'xml'), $args);
        else
            return call_user_func_array(array($this, 'html'), $args);
    }
    /**
     * jQuey difference
     *
     * @param $markup
     * @return unknown_type
     */
    public function markupOuter($callback1 = null, $callback2 = null, $callback3 = null) {
        $args = func_get_args();
        if ($this->documentWrapper->isXML)
            return call_user_func_array(array($this, 'xmlOuter'), $args);
        else
            return call_user_func_array(array($this, 'htmlOuter'), $args);
    }
    /**
     * Enter description here...
     *
     * @param unknown_type $html
     * @return string|phpQuery|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @TODO force html result
     */
    public function html($html = null, $callback1 = null, $callback2 = null, $callback3 = null) {
        if (isset($html)) {
            // INSERT
            $nodes = $this->documentWrapper->import($html);
            $this->empty();
            foreach($this->stack(1) as $alreadyAdded => $node) {
                // for now, limit events for textarea
                if (($this->isXHTML() || $this->isHTML()) && $node->tagName == 'textarea')
                    $oldHtml = pq($node, $this->getDocumentID())->markup();
                foreach($nodes as $newNode) {
                    $node->appendChild($alreadyAdded
                        ? $newNode->cloneNode(true)
                        : $newNode
                    );
                }
                // for now, limit events for textarea
                if (($this->isXHTML() || $this->isHTML()) && $node->tagName == 'textarea')
                    $this->markupEvents($html, $oldHtml, $node);
            }
            return $this;
        } else {
            // FETCH
            $return = $this->documentWrapper->markup($this->elements, true);
            $args = func_get_args();
            foreach(array_slice($args, 1) as $callback) {
                $return = phpQuery::callbackRun($callback, array($return));
            }
            return $return;
        }
    }
    /**
     * @TODO force xml result
     */
    public function xml($xml = null, $callback1 = null, $callback2 = null, $callback3 = null) {
        $args = func_get_args();
        return call_user_func_array(array($this, 'html'), $args);
    }
    /**
     * Enter description here...
     * @TODO force html result
     *
     * @return String
     */
    public function htmlOuter($callback1 = null, $callback2 = null, $callback3 = null) {
        $markup = $this->documentWrapper->markup($this->elements);
        // pass thou callbacks
        $args = func_get_args();
        foreach($args as $callback) {
            $markup = phpQuery::callbackRun($callback, array($markup));
        }
        return $markup;
    }
    /**
     * @TODO force xml result
     */
    public function xmlOuter($callback1 = null, $callback2 = null, $callback3 = null) {
        $args = func_get_args();
        return call_user_func_array(array($this, 'htmlOuter'), $args);
    }
    public function __toString() {
        return $this->markupOuter();
    }
    /**
     * Just like html(), but returns markup with VALID (dangerous) PHP tags.
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @todo support returning markup with PHP tags when called without param
     */
    public function php($code = null) {
        return $this->markupPHP($code);
    }
    /**
     * Enter description here...
     *
     * @param $code
     * @return unknown_type
     */
    public function markupPHP($code = null) {
        return isset($code)
            ? $this->markup(phpQuery::php($code))
            : phpQuery::markupToPHP($this->markup());
    }
    /**
     * Enter description here...
     *
     * @param $code
     * @return unknown_type
     */
    public function markupOuterPHP() {
        return phpQuery::markupToPHP($this->markupOuter());
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function children($selector = null) {
        $stack = array();
        foreach($this->stack(1) as $node) {
//          foreach($node->getElementsByTagName('*') as $newNode) {
            foreach($node->childNodes as $newNode) {
                if ($newNode->nodeType != 1)
                    continue;
                if ($selector && ! $this->is($selector, $newNode))
                    continue;
                if ($this->elementsContainsNode($newNode, $stack))
                    continue;
                $stack[] = $newNode;
            }
        }
        $this->elementsBackup = $this->elements;
        $this->elements = $stack;
        return $this->newInstance();
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function ancestors($selector = null) {
        return $this->children( $selector );
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function append( $content) {
        return $this->insert($content, __FUNCTION__);
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function appendPHP( $content) {
        return $this->insert("<php><!-- {$content} --></php>", 'append');
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function appendTo( $seletor) {
        return $this->insert($seletor, __FUNCTION__);
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function prepend( $content) {
        return $this->insert($content, __FUNCTION__);
    }
    /**
     * Enter description here...
     *
     * @todo accept many arguments, which are joined, arrays maybe also
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function prependPHP( $content) {
        return $this->insert("<php><!-- {$content} --></php>", 'prepend');
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function prependTo( $seletor) {
        return $this->insert($seletor, __FUNCTION__);
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function before($content) {
        return $this->insert($content, __FUNCTION__);
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function beforePHP( $content) {
        return $this->insert("<php><!-- {$content} --></php>", 'before');
    }
    /**
     * Enter description here...
     *
     * @param String|phpQuery
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function insertBefore( $seletor) {
        return $this->insert($seletor, __FUNCTION__);
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function after( $content) {
        return $this->insert($content, __FUNCTION__);
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function afterPHP( $content) {
        return $this->insert("<php><!-- {$content} --></php>", 'after');
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function insertAfter( $seletor) {
        return $this->insert($seletor, __FUNCTION__);
    }
    /**
     * Internal insert method. Don't use it.
     *
     * @param unknown_type $target
     * @param unknown_type $type
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @access private
     */
    public function insert($target, $type) {
        $this->debug("Inserting data with '{$type}'");
        $to = false;
        switch( $type) {
            case 'appendTo':
            case 'prependTo':
            case 'insertBefore':
            case 'insertAfter':
                $to = true;
        }
        switch(gettype($target)) {
            case 'string':
                $insertFrom = $insertTo = array();
                if ($to) {
                    // INSERT TO
                    $insertFrom = $this->elements;
                    if (phpQuery::isMarkup($target)) {
                        // $target is new markup, import it
                        $insertTo = $this->documentWrapper->import($target);
                    // insert into selected element
                    } else {
                        // $tagret is a selector
                        $thisStack = $this->elements;
                        $this->toRoot();
                        $insertTo = $this->find($target)->elements;
                        $this->elements = $thisStack;
                    }
                } else {
                    // INSERT FROM
                    $insertTo = $this->elements;
                    $insertFrom = $this->documentWrapper->import($target);
                }
                break;
            case 'object':
                $insertFrom = $insertTo = array();
                // phpQuery
                if ($target instanceof self) {
                    if ($to) {
                        $insertTo = $target->elements;
                        if ($this->documentFragment && $this->stackIsRoot())
                            // get all body children
//                          $loop = $this->find('body > *')->elements;
                            // TODO test it, test it hard...
//                          $loop = $this->newInstance($this->root)->find('> *')->elements;
                            $loop = $this->root->childNodes;
                        else
                            $loop = $this->elements;
                        // import nodes if needed
                        $insertFrom = $this->getDocumentID() == $target->getDocumentID()
                            ? $loop
                            : $target->documentWrapper->import($loop);
                    } else {
                        $insertTo = $this->elements;
                        if ( $target->documentFragment && $target->stackIsRoot() )
                            // get all body children
//                          $loop = $target->find('body > *')->elements;
                            $loop = $target->root->childNodes;
                        else
                            $loop = $target->elements;
                        // import nodes if needed
                        $insertFrom = $this->getDocumentID() == $target->getDocumentID()
                            ? $loop
                            : $this->documentWrapper->import($loop);
                    }
                // DOMNODE
                } elseif ($target instanceof DOMNODE) {
                    // import node if needed
//                  if ( $target->ownerDocument != $this->DOM )
//                      $target = $this->DOM->importNode($target, true);
                    if ( $to) {
                        $insertTo = array($target);
                        if ($this->documentFragment && $this->stackIsRoot())
                            // get all body children
                            $loop = $this->root->childNodes;
//                          $loop = $this->find('body > *')->elements;
                        else
                            $loop = $this->elements;
                        foreach($loop as $fromNode)
                            // import nodes if needed
                            $insertFrom[] = ! $fromNode->ownerDocument->isSameNode($target->ownerDocument)
                                ? $target->ownerDocument->importNode($fromNode, true)
                                : $fromNode;
                    } else {
                        // import node if needed
                        if (! $target->ownerDocument->isSameNode($this->document))
                            $target = $this->document->importNode($target, true);
                        $insertTo = $this->elements;
                        $insertFrom[] = $target;
                    }
                }
                break;
        }
        phpQuery::debug("From ".count($insertFrom)."; To ".count($insertTo)." nodes");
        foreach($insertTo as $insertNumber => $toNode) {
            // we need static relative elements in some cases
            switch( $type) {
                case 'prependTo':
                case 'prepend':
                    $firstChild = $toNode->firstChild;
                    break;
                case 'insertAfter':
                case 'after':
                    $nextSibling = $toNode->nextSibling;
                    break;
            }
            foreach($insertFrom as $fromNode) {
                // clone if inserted already before
                $insert = $insertNumber
                    ? $fromNode->cloneNode(true)
                    : $fromNode;
                switch($type) {
                    case 'appendTo':
                    case 'append':
//                      $toNode->insertBefore(
//                          $fromNode,
//                          $toNode->lastChild->nextSibling
//                      );
                        $toNode->appendChild($insert);
                        $eventTarget = $insert;
                        break;
                    case 'prependTo':
                    case 'prepend':
                        $toNode->insertBefore(
                            $insert,
                            $firstChild
                        );
                        break;
                    case 'insertBefore':
                    case 'before':
                        if (! $toNode->parentNode)
                            throw new Exception("No parentNode, can't do {$type}()");
                        else
                            $toNode->parentNode->insertBefore(
                                $insert,
                                $toNode
                            );
                        break;
                    case 'insertAfter':
                    case 'after':
                        if (! $toNode->parentNode)
                            throw new Exception("No parentNode, can't do {$type}()");
                        else
                            $toNode->parentNode->insertBefore(
                                $insert,
                                $nextSibling
                            );
                        break;
                }
                // Mutation event
                $event = new DOMEvent(array(
                    'target' => $insert,
                    'type' => 'DOMNodeInserted'
                ));
                phpQueryEvents::trigger($this->getDocumentID(),
                    $event->type, array($event), $insert
                );
            }
        }
        return $this;
    }
    /**
     * Enter description here...
     *
     * @return Int
     */
    public function index($subject) {
        $index = -1;
        $subject = $subject instanceof phpQueryObject
            ? $subject->elements[0]
            : $subject;
        foreach($this->newInstance() as $k => $node) {
            if ($node->isSameNode($subject))
                $index = $k;
        }
        return $index;
    }
    /**
     * Enter description here...
     *
     * @param unknown_type $start
     * @param unknown_type $end
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @testme
     */
    public function slice($start, $end = null) {
//      $last = count($this->elements)-1;
//      $end = $end
//          ? min($end, $last)
//          : $last;
//      if ($start < 0)
//          $start = $last+$start;
//      if ($start > $last)
//          return array();
        if ($end > 0)
            $end = $end-$start;
        return $this->newInstance(
            array_slice($this->elements, $start, $end)
        );
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function reverse() {
        $this->elementsBackup = $this->elements;
        $this->elements = array_reverse($this->elements);
        return $this->newInstance();
    }
    /**
     * Return joined text content.
     * @return String
     */
    public function text($text = null, $callback1 = null, $callback2 = null, $callback3 = null) {
        if (isset($text))
            return $this->html(htmlspecialchars($text));
        $args = func_get_args();
        $args = array_slice($args, 1);
        $return = '';
        foreach($this->elements as $node) {
            $text = $node->textContent;
            if (count($this->elements) > 1 && $text)
                $text .= "\n";
            foreach($args as $callback) {
                $text = phpQuery::callbackRun($callback, array($text));
            }
            $return .= $text;
        }
        return $return;
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function plugin($class, $file = null) {
        phpQuery::plugin($class, $file);
        return $this;
    }
    /**
     * Deprecated, use $pq->plugin() instead.
     *
     * @deprecated
     * @param $class
     * @param $file
     * @return unknown_type
     */
    public static function extend($class, $file = null) {
        return $this->plugin($class, $file);
    }
    /**
     *
     * @access private
     * @param $method
     * @param $args
     * @return unknown_type
     */
    public function __call($method, $args) {
        $aliasMethods = array('clone', 'empty');
        if (isset(phpQuery::$extendMethods[$method])) {
            array_unshift($args, $this);
            return phpQuery::callbackRun(
                phpQuery::$extendMethods[$method], $args
            );
        } else if (isset(phpQuery::$pluginsMethods[$method])) {
            array_unshift($args, $this);
            $class = phpQuery::$pluginsMethods[$method];
            $realClass = "phpQueryObjectPlugin_$class";
            $return = call_user_func_array(
                array($realClass, $method),
                $args
            );
            // XXX deprecate ?
            return is_null($return)
                ? $this
                : $return;
        } else if (in_array($method, $aliasMethods)) {
            return call_user_func_array(array($this, '_'.$method), $args);
        } else
            throw new Exception("Method '{$method}' doesnt exist");
    }
    /**
     * Safe rename of next().
     *
     * Use it ONLY when need to call next() on an iterated object (in same time).
     * Normaly there is no need to do such thing ;)
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @access private
     */
    public function _next($selector = null) {
        return $this->newInstance(
            $this->getElementSiblings('nextSibling', $selector, true)
        );
    }
    /**
     * Use prev() and next().
     *
     * @deprecated
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @access private
     */
    public function _prev($selector = null) {
        return $this->prev($selector);
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function prev($selector = null) {
        return $this->newInstance(
            $this->getElementSiblings('previousSibling', $selector, true)
        );
    }
    /**
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @todo
     */
    public function prevAll($selector = null) {
        return $this->newInstance(
            $this->getElementSiblings('previousSibling', $selector)
        );
    }
    /**
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @todo FIXME: returns source elements insted of next siblings
     */
    public function nextAll($selector = null) {
        return $this->newInstance(
            $this->getElementSiblings('nextSibling', $selector)
        );
    }
    /**
     * @access private
     */
    protected function getElementSiblings($direction, $selector = null, $limitToOne = false) {
        $stack = array();
        $count = 0;
        foreach($this->stack() as $node) {
            $test = $node;
            while( isset($test->{$direction}) && $test->{$direction}) {
                $test = $test->{$direction};
                if (! $test instanceof DOMELEMENT)
                    continue;
                $stack[] = $test;
                if ($limitToOne)
                    break;
            }
        }
        if ($selector) {
            $stackOld = $this->elements;
            $this->elements = $stack;
            $stack = $this->filter($selector, true)->stack();
            $this->elements = $stackOld;
        }
        return $stack;
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function siblings($selector = null) {
        $stack = array();
        $siblings = array_merge(
            $this->getElementSiblings('previousSibling', $selector),
            $this->getElementSiblings('nextSibling', $selector)
        );
        foreach($siblings as $node) {
            if (! $this->elementsContainsNode($node, $stack))
                $stack[] = $node;
        }
        return $this->newInstance($stack);
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function not($selector = null) {
        if (is_string($selector))
            phpQuery::debug(array('not', $selector));
        else
            phpQuery::debug('not');
        $stack = array();
        if ($selector instanceof self || $selector instanceof DOMNODE) {
            foreach($this->stack() as $node) {
                if ($selector instanceof self) {
                    $matchFound = false;
                    foreach($selector->stack() as $notNode) {
                        if ($notNode->isSameNode($node))
                            $matchFound = true;
                    }
                    if (! $matchFound)
                        $stack[] = $node;
                } else if ($selector instanceof DOMNODE) {
                    if (! $selector->isSameNode($node))
                        $stack[] = $node;
                } else {
                    if (! $this->is($selector))
                        $stack[] = $node;
                }
            }
        } else {
            $orgStack = $this->stack();
            $matched = $this->filter($selector, true)->stack();
//          $matched = array();
//          // simulate OR in filter() instead of AND 5y
//          foreach($this->parseSelector($selector) as $s) {
//              $matched = array_merge($matched,
//                  $this->filter(array($s))->stack()
//              );
//          }
            foreach($orgStack as $node)
                if (! $this->elementsContainsNode($node, $matched))
                    $stack[] = $node;
        }
        return $this->newInstance($stack);
    }
    /**
     * Enter description here...
     *
     * @param string|phpQueryObject
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function add($selector = null) {
        if (! $selector)
            return $this;
        $stack = array();
        $this->elementsBackup = $this->elements;
        $found = phpQuery::pq($selector, $this->getDocumentID());
        $this->merge($found->elements);
        return $this->newInstance();
    }
    /**
     * @access private
     */
    protected function merge() {
        foreach(func_get_args() as $nodes)
            foreach($nodes as $newNode )
                if (! $this->elementsContainsNode($newNode) )
                    $this->elements[] = $newNode;
    }
    /**
     * @access private
     * TODO refactor to stackContainsNode
     */
    protected function elementsContainsNode($nodeToCheck, $elementsStack = null) {
        $loop = ! is_null($elementsStack)
            ? $elementsStack
            : $this->elements;
        foreach($loop as $node) {
            if ( $node->isSameNode( $nodeToCheck ) )
                return true;
        }
        return false;
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function parent($selector = null) {
        $stack = array();
        foreach($this->elements as $node )
            if ( $node->parentNode && ! $this->elementsContainsNode($node->parentNode, $stack) )
                $stack[] = $node->parentNode;
        $this->elementsBackup = $this->elements;
        $this->elements = $stack;
        if ( $selector )
            $this->filter($selector, true);
        return $this->newInstance();
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function parents($selector = null) {
        $stack = array();
        if (! $this->elements )
            $this->debug('parents() - stack empty');
        foreach($this->elements as $node) {
            $test = $node;
            while( $test->parentNode) {
                $test = $test->parentNode;
                if ($this->isRoot($test))
                    break;
                if (! $this->elementsContainsNode($test, $stack)) {
                    $stack[] = $test;
                    continue;
                }
            }
        }
        $this->elementsBackup = $this->elements;
        $this->elements = $stack;
        if ( $selector )
            $this->filter($selector, true);
        return $this->newInstance();
    }
    /**
     * Internal stack iterator.
     *
     * @access private
     */
    public function stack($nodeTypes = null) {
        if (!isset($nodeTypes))
            return $this->elements;
        if (!is_array($nodeTypes))
            $nodeTypes = array($nodeTypes);
        $return = array();
        foreach($this->elements as $node) {
            if (in_array($node->nodeType, $nodeTypes))
                $return[] = $node;
        }
        return $return;
    }
    // TODO phpdoc; $oldAttr is result of hasAttribute, before any changes
    protected function attrEvents($attr, $oldAttr, $oldValue, $node) {
        // skip events for XML documents
        if (! $this->isXHTML() && ! $this->isHTML())
            return;
        $event = null;
        // identify
        $isInputValue = $node->tagName == 'input'
            && (
                in_array($node->getAttribute('type'),
                    array('text', 'password', 'hidden'))
                || !$node->getAttribute('type')
                 );
        $isRadio = $node->tagName == 'input'
            && $node->getAttribute('type') == 'radio';
        $isCheckbox = $node->tagName == 'input'
            && $node->getAttribute('type') == 'checkbox';
        $isOption = $node->tagName == 'option';
        if ($isInputValue && $attr == 'value' && $oldValue != $node->getAttribute($attr)) {
            $event = new DOMEvent(array(
                'target' => $node,
                'type' => 'change'
            ));
        } else if (($isRadio || $isCheckbox) && $attr == 'checked' && (
                // check
                (! $oldAttr && $node->hasAttribute($attr))
                // un-check
                || (! $node->hasAttribute($attr) && $oldAttr)
            )) {
            $event = new DOMEvent(array(
                'target' => $node,
                'type' => 'change'
            ));
        } else if ($isOption && $node->parentNode && $attr == 'selected' && (
                // select
                (! $oldAttr && $node->hasAttribute($attr))
                // un-select
                || (! $node->hasAttribute($attr) && $oldAttr)
            )) {
            $event = new DOMEvent(array(
                'target' => $node->parentNode,
                'type' => 'change'
            ));
        }
        if ($event) {
            phpQueryEvents::trigger($this->getDocumentID(),
                $event->type, array($event), $node
            );
        }
    }
    public function attr($attr = null, $value = null) {
        foreach($this->stack(1) as $node) {
            if (! is_null($value)) {
                $loop = $attr == '*'
                    ? $this->getNodeAttrs($node)
                    : array($attr);
                foreach($loop as $a) {
                    $oldValue = $node->getAttribute($a);
                    $oldAttr = $node->hasAttribute($a);
                    // TODO raises an error when charset other than UTF-8
                    // while document's charset is also not UTF-8
                    @$node->setAttribute($a, $value);
                    $this->attrEvents($a, $oldAttr, $oldValue, $node);
                }
            } else if ($attr == '*') {
                // jQuery difference
                $return = array();
                foreach($node->attributes as $n => $v)
                    $return[$n] = $v->value;
                return $return;
            } else
                return $node->hasAttribute($attr)
                    ? $node->getAttribute($attr)
                    : null;
        }
        return is_null($value)
            ? '' : $this;
    }
    /**
     * @access private
     */
    protected function getNodeAttrs($node) {
        $return = array();
        foreach($node->attributes as $n => $o)
            $return[] = $n;
        return $return;
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @todo check CDATA ???
     */
    public function attrPHP($attr, $code) {
        if (! is_null($code)) {
            $value = '<'.'?php '.$code.' ?'.'>';
            // TODO tempolary solution
            // http://code.google.com/p/phpquery/issues/detail?id=17
//          if (function_exists('mb_detect_encoding') && mb_detect_encoding($value) == 'ASCII')
//              $value  = mb_convert_encoding($value, 'UTF-8', 'HTML-ENTITIES');
        }
        foreach($this->stack(1) as $node) {
            if (! is_null($code)) {
//              $attrNode = $this->DOM->createAttribute($attr);
                $node->setAttribute($attr, $value);
//              $attrNode->value = $value;
//              $node->appendChild($attrNode);
            } else if ( $attr == '*') {
                // jQuery diff
                $return = array();
                foreach($node->attributes as $n => $v)
                    $return[$n] = $v->value;
                return $return;
            } else
                return $node->getAttribute($attr);
        }
        return $this;
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function removeAttr($attr) {
        foreach($this->stack(1) as $node) {
            $loop = $attr == '*'
                ? $this->getNodeAttrs($node)
                : array($attr);
            foreach($loop as $a) {
                $oldValue = $node->getAttribute($a);
                $node->removeAttribute($a);
                $this->attrEvents($a, $oldValue, null, $node);
            }
        }
        return $this;
    }
    /**
     * Return form element value.
     *
     * @return String Fields value.
     */
    public function val($val = null) {
        if (! isset($val)) {
            if ($this->eq(0)->is('select')) {
                    $selected = $this->eq(0)->find('option[selected=selected]');
                    if ($selected->is('[value]'))
                        return $selected->attr('value');
                    else
                        return $selected->text();
            } else if ($this->eq(0)->is('textarea'))
                    return $this->eq(0)->markup();
                else
                    return $this->eq(0)->attr('value');
        } else {
            $_val = null;
            foreach($this->stack(1) as $node) {
                $node = pq($node, $this->getDocumentID());
                if (is_array($val) && in_array($node->attr('type'), array('checkbox', 'radio'))) {
                    $isChecked = in_array($node->attr('value'), $val)
                            || in_array($node->attr('name'), $val);
                    if ($isChecked)
                        $node->attr('checked', 'checked');
                    else
                        $node->removeAttr('checked');
                } else if ($node->get(0)->tagName == 'select') {
                    if (! isset($_val)) {
                        $_val = array();
                        if (! is_array($val))
                            $_val = array((string)$val);
                        else
                            foreach($val as $v)
                                $_val[] = $v;
                    }
                    foreach($node['option']->stack(1) as $option) {
                        $option = pq($option, $this->getDocumentID());
                        $selected = false;
                        // XXX: workaround for string comparsion, see issue #96
                        // http://code.google.com/p/phpquery/issues/detail?id=96
                        $selected = is_null($option->attr('value'))
                            ? in_array($option->markup(), $_val)
                            : in_array($option->attr('value'), $_val);
//                      $optionValue = $option->attr('value');
//                      $optionText = $option->text();
//                      $optionTextLenght = mb_strlen($optionText);
//                      foreach($_val as $v)
//                          if ($optionValue == $v)
//                              $selected = true;
//                          else if ($optionText == $v && $optionTextLenght == mb_strlen($v))
//                              $selected = true;
                        if ($selected)
                            $option->attr('selected', 'selected');
                        else
                            $option->removeAttr('selected');
                    }
                } else if ($node->get(0)->tagName == 'textarea')
                    $node->markup($val);
                else
                    $node->attr('value', $val);
            }
        }
        return $this;
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function andSelf() {
        if ( $this->previous )
            $this->elements = array_merge($this->elements, $this->previous->elements);
        return $this;
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function addClass( $className) {
        if (! $className)
            return $this;
        foreach($this->stack(1) as $node) {
            if (! $this->is(".$className", $node))
                $node->setAttribute(
                    'class',
                    trim($node->getAttribute('class').' '.$className)
                );
        }
        return $this;
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function addClassPHP( $className) {
        foreach($this->stack(1) as $node) {
                $classes = $node->getAttribute('class');
                $newValue = $classes
                    ? $classes.' <'.'?php '.$className.' ?'.'>'
                    : '<'.'?php '.$className.' ?'.'>';
                $node->setAttribute('class', $newValue);
        }
        return $this;
    }
    /**
     * Enter description here...
     *
     * @param   string  $className
     * @return  bool
     */
    public function hasClass($className) {
        foreach($this->stack(1) as $node) {
            if ( $this->is(".$className", $node))
                return true;
        }
        return false;
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function removeClass($className) {
        foreach($this->stack(1) as $node) {
            $classes = explode( ' ', $node->getAttribute('class'));
            if ( in_array($className, $classes)) {
                $classes = array_diff($classes, array($className));
                if ( $classes )
                    $node->setAttribute('class', implode(' ', $classes));
                else
                    $node->removeAttribute('class');
            }
        }
        return $this;
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function toggleClass($className) {
        foreach($this->stack(1) as $node) {
            if ( $this->is( $node, '.'.$className ))
                $this->removeClass($className);
            else
                $this->addClass($className);
        }
        return $this;
    }
    /**
     * Proper name without underscore (just ->empty()) also works.
     *
     * Removes all child nodes from the set of matched elements.
     *
     * Example:
     * pq("p")._empty()
     *
     * HTML:
     * <p>Hello, <span>Person</span> <a href="#">and person</a></p>
     *
     * Result:
     * [ <p></p> ]
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @access private
     */
    public function _empty() {
        foreach($this->stack(1) as $node) {
            // thx to 'dave at dgx dot cz'
            $node->nodeValue = '';
        }
        return $this;
    }
    /**
     * Enter description here...
     *
     * @param array|string $callback Expects $node as first param, $index as second
     * @param array $scope External variables passed to callback. Use compact('varName1', 'varName2'...) and extract($scope)
     * @param array $arg1 Will ba passed as third and futher args to callback.
     * @param array $arg2 Will ba passed as fourth and futher args to callback, and so on...
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function each($callback, $param1 = null, $param2 = null, $param3 = null) {
        $paramStructure = null;
        if (func_num_args() > 1) {
            $paramStructure = func_get_args();
            $paramStructure = array_slice($paramStructure, 1);
        }
        foreach($this->elements as $v)
            phpQuery::callbackRun($callback, array($v), $paramStructure);
        return $this;
    }
    /**
     * Run callback on actual object.
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function callback($callback, $param1 = null, $param2 = null, $param3 = null) {
        $params = func_get_args();
        $params[0] = $this;
        phpQuery::callbackRun($callback, $params);
        return $this;
    }
    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @todo add $scope and $args as in each() ???
     */
    public function map($callback, $param1 = null, $param2 = null, $param3 = null) {
//      $stack = array();
////        foreach($this->newInstance() as $node) {
//      foreach($this->newInstance() as $node) {
//          $result = call_user_func($callback, $node);
//          if ($result)
//              $stack[] = $result;
//      }
        $params = func_get_args();
        array_unshift($params, $this->elements);
        return $this->newInstance(
            call_user_func_array(array('phpQuery', 'map'), $params)
//          phpQuery::map($this->elements, $callback)
        );
    }
    /**
     * Enter description here...
     *
     * @param <type> $key
     * @param <type> $value
     */
    public function data($key, $value = null) {
        if (! isset($value)) {
            // TODO? implement specific jQuery behavior od returning parent values
            // is child which we look up doesn't exist
            return phpQuery::data($this->get(0), $key, $value, $this->getDocumentID());
        } else {
            foreach($this as $node)
                phpQuery::data($node, $key, $value, $this->getDocumentID());
            return $this;
        }
    }
    /**
     * Enter description here...
     *
     * @param <type> $key
     */
    public function removeData($key) {
        foreach($this as $node)
            phpQuery::removeData($node, $key, $this->getDocumentID());
        return $this;
    }
    // INTERFACE IMPLEMENTATIONS

    // ITERATOR INTERFACE
    /**
   * @access private
     */
    public function rewind(){
        $this->debug('iterating foreach');
//      phpQuery::selectDocument($this->getDocumentID());
        $this->elementsBackup = $this->elements;
        $this->elementsInterator = $this->elements;
        $this->valid = isset( $this->elements[0] )
            ? 1 : 0;
//      $this->elements = $this->valid
//          ? array($this->elements[0])
//          : array();
        $this->current = 0;
    }
    /**
   * @access private
     */
    public function current(){
        return $this->elementsInterator[ $this->current ];
    }
    /**
   * @access private
     */
    public function key(){
        return $this->current;
    }
    /**
     * Double-function method.
     *
     * First: main iterator interface method.
     * Second: Returning next sibling, alias for _next().
     *
     * Proper functionality is choosed automagicaly.
     *
     * @see phpQueryObject::_next()
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function next($cssSelector = null){
//      if ($cssSelector || $this->valid)
//          return $this->_next($cssSelector);
        $this->valid = isset( $this->elementsInterator[ $this->current+1 ] )
            ? true
            : false;
        if (! $this->valid && $this->elementsInterator) {
            $this->elementsInterator = null;
        } else if ($this->valid) {
            $this->current++;
        } else {
            return $this->_next($cssSelector);
        }
    }
    /**
   * @access private
     */
    public function valid(){
        return $this->valid;
    }
    // ITERATOR INTERFACE END
    // ARRAYACCESS INTERFACE
    /**
   * @access private
     */
    public function offsetExists($offset) {
        return $this->find($offset)->size() > 0;
    }
    /**
   * @access private
     */
    public function offsetGet($offset) {
        return $this->find($offset);
    }
    /**
   * @access private
     */
    public function offsetSet($offset, $value) {
//      $this->find($offset)->replaceWith($value);
        $this->find($offset)->html($value);
    }
    /**
   * @access private
     */
    public function offsetUnset($offset) {
        // empty
        throw new Exception("Can't do unset, use array interface only for calling queries and replacing HTML.");
    }
    // ARRAYACCESS INTERFACE END
    /**
     * Returns node's XPath.
     *
     * @param unknown_type $oneNode
     * @return string
     * @TODO use native getNodePath is avaible
     * @access private
     */
    protected function getNodeXpath($oneNode = null, $namespace = null) {
        $return = array();
        $loop = $oneNode
            ? array($oneNode)
            : $this->elements;
//      if ($namespace)
//          $namespace .= ':';
        foreach($loop as $node) {
            if ($node instanceof DOMDOCUMENT) {
                $return[] = '';
                continue;
            }
            $xpath = array();
            while(! ($node instanceof DOMDOCUMENT)) {
                $i = 1;
                $sibling = $node;
                while($sibling->previousSibling) {
                    $sibling = $sibling->previousSibling;
                    $isElement = $sibling instanceof DOMELEMENT;
                    if ($isElement && $sibling->tagName == $node->tagName)
                        $i++;
                }
                $xpath[] = $this->isXML()
                    ? "*[local-name()='{$node->tagName}'][{$i}]"
                    : "{$node->tagName}[{$i}]";
                $node = $node->parentNode;
            }
            $xpath = join('/', array_reverse($xpath));
            $return[] = '/'.$xpath;
        }
        return $oneNode
            ? $return[0]
            : $return;
    }
    // HELPERS
    public function whois($oneNode = null) {
        $return = array();
        $loop = $oneNode
            ? array( $oneNode )
            : $this->elements;
        foreach($loop as $node) {
            if (isset($node->tagName)) {
                $tag = in_array($node->tagName, array('php', 'js'))
                    ? strtoupper($node->tagName)
                    : $node->tagName;
                $return[] = $tag
                    .($node->getAttribute('id')
                        ? '#'.$node->getAttribute('id'):'')
                    .($node->getAttribute('class')
                        ? '.'.join('.', split(' ', $node->getAttribute('class'))):'')
                    .($node->getAttribute('name')
                        ? '[name="'.$node->getAttribute('name').'"]':'')
                    .($node->getAttribute('value') && strpos($node->getAttribute('value'), '<'.'?php') === false
                        ? '[value="'.substr(str_replace("\n", '', $node->getAttribute('value')), 0, 15).'"]':'')
                    .($node->getAttribute('value') && strpos($node->getAttribute('value'), '<'.'?php') !== false
                        ? '[value=PHP]':'')
                    .($node->getAttribute('selected')
                        ? '[selected]':'')
                    .($node->getAttribute('checked')
                        ? '[checked]':'')
                ;
            } else if ($node instanceof DOMTEXT) {
                if (trim($node->textContent))
                    $return[] = 'Text:'.substr(str_replace("\n", ' ', $node->textContent), 0, 15);
            } else {

            }
        }
        return $oneNode && isset($return[0])
            ? $return[0]
            : $return;
    }
    /**
     * Dump htmlOuter and preserve chain. Usefull for debugging.
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     *
     */
    public function dump() {
        print 'DUMP #'.(phpQuery::$dumpCount++).' ';
        $debug = phpQuery::$debug;
        phpQuery::$debug = false;
//      print __FILE__.':'.__LINE__."\n";
        var_dump($this->htmlOuter());
        return $this;
    }
    public function dumpWhois() {
        print 'DUMP #'.(phpQuery::$dumpCount++).' ';
        $debug = phpQuery::$debug;
        phpQuery::$debug = false;
//      print __FILE__.':'.__LINE__."\n";
        var_dump('whois', $this->whois());
        phpQuery::$debug = $debug;
        return $this;
    }
    public function dumpLength() {
        print 'DUMP #'.(phpQuery::$dumpCount++).' ';
        $debug = phpQuery::$debug;
        phpQuery::$debug = false;
//      print __FILE__.':'.__LINE__."\n";
        var_dump('length', $this->length());
        phpQuery::$debug = $debug;
        return $this;
    }
    public function dumpTree($html = true, $title = true) {
        $output = $title
            ? 'DUMP #'.(phpQuery::$dumpCount++)." \n" : '';
        $debug = phpQuery::$debug;
        phpQuery::$debug = false;
        foreach($this->stack() as $node)
            $output .= $this->__dumpTree($node);
        phpQuery::$debug = $debug;
        print $html
            ? nl2br(str_replace(' ', '&nbsp;', $output))
            : $output;
        return $this;
    }
    private function __dumpTree($node, $intend = 0) {
        $whois = $this->whois($node);
        $return = '';
        if ($whois)
            $return .= str_repeat(' - ', $intend).$whois."\n";
        if (isset($node->childNodes))
            foreach($node->childNodes as $chNode)
                $return .= $this->__dumpTree($chNode, $intend+1);
        return $return;
    }
    /**
     * Dump htmlOuter and stop script execution. Usefull for debugging.
     *
     */
    public function dumpDie() {
        print __FILE__.':'.__LINE__;
        var_dump($this->htmlOuter());
        die();
    }
}


// -- Multibyte Compatibility functions ---------------------------------------
// http://svn.iphonewebdev.com/lace/lib/mb_compat.php

/**
 *  mb_internal_encoding()
 *
 *  Included for mbstring pseudo-compatability.
 */
if (!function_exists('mb_internal_encoding'))
{
    function mb_internal_encoding($enc) {return true; }
}

/**
 *  mb_regex_encoding()
 *
 *  Included for mbstring pseudo-compatability.
 */
if (!function_exists('mb_regex_encoding'))
{
    function mb_regex_encoding($enc) {return true; }
}

/**
 *  mb_strlen()
 *
 *  Included for mbstring pseudo-compatability.
 */
if (!function_exists('mb_strlen'))
{
    function mb_strlen($str)
    {
        return strlen($str);
    }
}

/**
 *  mb_strpos()
 *
 *  Included for mbstring pseudo-compatability.
 */
if (!function_exists('mb_strpos'))
{
    function mb_strpos($haystack, $needle, $offset=0)
    {
        return strpos($haystack, $needle, $offset);
    }
}
/**
 *  mb_stripos()
 *
 *  Included for mbstring pseudo-compatability.
 */
if (!function_exists('mb_stripos'))
{
    function mb_stripos($haystack, $needle, $offset=0)
    {
        return stripos($haystack, $needle, $offset);
    }
}

/**
 *  mb_substr()
 *
 *  Included for mbstring pseudo-compatability.
 */
if (!function_exists('mb_substr'))
{
    function mb_substr($str, $start, $length=0)
    {
        return substr($str, $start, $length);
    }
}

/**
 *  mb_substr_count()
 *
 *  Included for mbstring pseudo-compatability.
 */
if (!function_exists('mb_substr_count'))
{
    function mb_substr_count($haystack, $needle)
    {
        return substr_count($haystack, $needle);
    }
}


/**
 * Static namespace for phpQuery functions.
 *
 * @author Tobiasz Cudnik <tobiasz.cudnik/gmail.com>
 * @package phpQuery
 */
abstract class phpQuery {
    /**
     * XXX: Workaround for mbstring problems
     *
     * @var bool
     */
    public static $mbstringSupport = true;
    public static $debug = false;
    public static $documents = array();
    public static $defaultDocumentID = null;
//  public static $defaultDoctype = 'html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"';
    /**
     * Applies only to HTML.
     *
     * @var unknown_type
     */
    public static $defaultDoctype = '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">';
    public static $defaultCharset = 'UTF-8';
    /**
     * Static namespace for plugins.
     *
     * @var object
     */
    public static $plugins = array();
    /**
     * List of loaded plugins.
     *
     * @var unknown_type
     */
    public static $pluginsLoaded = array();
    public static $pluginsMethods = array();
    public static $pluginsStaticMethods = array();
    public static $extendMethods = array();
    /**
     * @TODO implement
     */
    public static $extendStaticMethods = array();
    /**
     * Hosts allowed for AJAX connections.
     * Dot '.' means $_SERVER['HTTP_HOST'] (if any).
     *
     * @var array
     */
    public static $ajaxAllowedHosts = array(
        '.'
    );
    /**
     * AJAX settings.
     *
     * @var array
     * XXX should it be static or not ?
     */
    public static $ajaxSettings = array(
        'url' => '',//TODO
        'global' => true,
        'type' => "GET",
        'timeout' => null,
        'contentType' => "application/x-www-form-urlencoded",
        'processData' => true,
//      'async' => true,
        'data' => null,
        'username' => null,
        'password' => null,
        'accepts' => array(
            'xml' => "application/xml, text/xml",
            'html' => "text/html",
            'script' => "text/javascript, application/javascript",
            'json' => "application/json, text/javascript",
            'text' => "text/plain",
            '_default' => "*/*"
        )
    );
    public static $lastModified = null;
    public static $active = 0;
    public static $dumpCount = 0;
    /**
     * Multi-purpose function.
     * Use pq() as shortcut.
     *
     * In below examples, $pq is any result of pq(); function.
     *
     * 1. Import markup into existing document (without any attaching):
     * - Import into selected document:
     *   pq('<div/>')               // DOESNT accept text nodes at beginning of input string !
     * - Import into document with ID from $pq->getDocumentID():
     *   pq('<div/>', $pq->getDocumentID())
     * - Import into same document as DOMNode belongs to:
     *   pq('<div/>', DOMNode)
     * - Import into document from phpQuery object:
     *   pq('<div/>', $pq)
     *
     * 2. Run query:
     * - Run query on last selected document:
     *   pq('div.myClass')
     * - Run query on document with ID from $pq->getDocumentID():
     *   pq('div.myClass', $pq->getDocumentID())
     * - Run query on same document as DOMNode belongs to and use node(s)as root for query:
     *   pq('div.myClass', DOMNode)
     * - Run query on document from phpQuery object
     *   and use object's stack as root node(s) for query:
     *   pq('div.myClass', $pq)
     *
     * @param string|DOMNode|DOMNodeList|array  $arg1   HTML markup, CSS Selector, DOMNode or array of DOMNodes
     * @param string|phpQueryObject|DOMNode $context    DOM ID from $pq->getDocumentID(), phpQuery object (determines also query root) or DOMNode (determines also query root)
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery|QueryTemplatesPhpQuery|false
   * phpQuery object or false in case of error.
     */
    public static function pq($arg1, $context = null) {
        if ($arg1 instanceof DOMNODE && ! isset($context)) {
            foreach(phpQuery::$documents as $documentWrapper) {
                $compare = $arg1 instanceof DOMDocument
                    ? $arg1 : $arg1->ownerDocument;
                if ($documentWrapper->document->isSameNode($compare))
                    $context = $documentWrapper->id;
            }
        }
        if (! $context) {
            $domId = self::$defaultDocumentID;
            if (! $domId)
                throw new Exception("Can't use last created DOM, because there isn't any. Use phpQuery::newDocument() first.");
//      } else if (is_object($context) && ($context instanceof PHPQUERY || is_subclass_of($context, 'phpQueryObject')))
        } else if (is_object($context) && $context instanceof phpQueryObject)
            $domId = $context->getDocumentID();
        else if ($context instanceof DOMDOCUMENT) {
            $domId = self::getDocumentID($context);
            if (! $domId) {
                //throw new Exception('Orphaned DOMDocument');
                $domId = self::newDocument($context)->getDocumentID();
            }
        } else if ($context instanceof DOMNODE) {
            $domId = self::getDocumentID($context);
            if (! $domId) {
                throw new Exception('Orphaned DOMNode');
//              $domId = self::newDocument($context->ownerDocument);
            }
        } else
            $domId = $context;
        if ($arg1 instanceof phpQueryObject) {
//      if (is_object($arg1) && (get_class($arg1) == 'phpQueryObject' || $arg1 instanceof PHPQUERY || is_subclass_of($arg1, 'phpQueryObject'))) {
            /**
             * Return $arg1 or import $arg1 stack if document differs:
             * pq(pq('<div/>'))
             */
            if ($arg1->getDocumentID() == $domId)
                return $arg1;
            $class = get_class($arg1);
            // support inheritance by passing old object to overloaded constructor
            $phpQuery = $class != 'phpQuery'
                ? new $class($arg1, $domId)
                : new phpQueryObject($domId);
            $phpQuery->elements = array();
            foreach($arg1->elements as $node)
                $phpQuery->elements[] = $phpQuery->document->importNode($node, true);
            return $phpQuery;
        } else if ($arg1 instanceof DOMNODE || (is_array($arg1) && isset($arg1[0]) && $arg1[0] instanceof DOMNODE)) {
            /*
             * Wrap DOM nodes with phpQuery object, import into document when needed:
             * pq(array($domNode1, $domNode2))
             */
            $phpQuery = new phpQueryObject($domId);
            if (!($arg1 instanceof DOMNODELIST) && ! is_array($arg1))
                $arg1 = array($arg1);
            $phpQuery->elements = array();
            foreach($arg1 as $node) {
                $sameDocument = $node->ownerDocument instanceof DOMDOCUMENT
                    && ! $node->ownerDocument->isSameNode($phpQuery->document);
                $phpQuery->elements[] = $sameDocument
                    ? $phpQuery->document->importNode($node, true)
                    : $node;
            }
            return $phpQuery;
        } else if (self::isMarkup($arg1)) {
            /**
             * Import HTML:
             * pq('<div/>')
             */
            $phpQuery = new phpQueryObject($domId);
            return $phpQuery->newInstance(
                $phpQuery->documentWrapper->import($arg1)
            );
        } else {
            /**
             * Run CSS query:
             * pq('div.myClass')
             */
            $phpQuery = new phpQueryObject($domId);
//          if ($context && ($context instanceof PHPQUERY || is_subclass_of($context, 'phpQueryObject')))
            if ($context && $context instanceof phpQueryObject)
                $phpQuery->elements = $context->elements;
            else if ($context && $context instanceof DOMNODELIST) {
                $phpQuery->elements = array();
                foreach($context as $node)
                    $phpQuery->elements[] = $node;
            } else if ($context && $context instanceof DOMNODE)
                $phpQuery->elements = array($context);
            return $phpQuery->find($arg1);
        }
    }
    /**
     * Sets default document to $id. Document has to be loaded prior
     * to using this method.
     * $id can be retrived via getDocumentID() or getDocumentIDRef().
     *
     * @param unknown_type $id
     */
    public static function selectDocument($id) {
        $id = self::getDocumentID($id);
        self::debug("Selecting document '$id' as default one");
        self::$defaultDocumentID = self::getDocumentID($id);
    }
    /**
     * Returns document with id $id or last used as phpQueryObject.
     * $id can be retrived via getDocumentID() or getDocumentIDRef().
     * Chainable.
     *
     * @see phpQuery::selectDocument()
     * @param unknown_type $id
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public static function getDocument($id = null) {
        if ($id)
            phpQuery::selectDocument($id);
        else
            $id = phpQuery::$defaultDocumentID;
        return new phpQueryObject($id);
    }
    /**
     * Creates new document from markup.
     * Chainable.
     *
     * @param unknown_type $markup
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public static function newDocument($markup = null, $contentType = null) {
        if (! $markup)
            $markup = '';
        $documentID = phpQuery::createDocumentWrapper($markup, $contentType);
        return new phpQueryObject($documentID);
    }
    /**
     * Creates new document from markup.
     * Chainable.
     *
     * @param unknown_type $markup
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public static function newDocumentHTML($markup = null, $charset = null) {
        $contentType = $charset
            ? ";charset=$charset"
            : '';
        return self::newDocument($markup, "text/html{$contentType}");
    }
    /**
     * Creates new document from markup.
     * Chainable.
     *
     * @param unknown_type $markup
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public static function newDocumentXML($markup = null, $charset = null) {
        $contentType = $charset
            ? ";charset=$charset"
            : '';
        return self::newDocument($markup, "text/xml{$contentType}");
    }
    /**
     * Creates new document from markup.
     * Chainable.
     *
     * @param unknown_type $markup
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public static function newDocumentXHTML($markup = null, $charset = null) {
        $contentType = $charset
            ? ";charset=$charset"
            : '';
        return self::newDocument($markup, "application/xhtml+xml{$contentType}");
    }
    /**
     * Creates new document from markup.
     * Chainable.
     *
     * @param unknown_type $markup
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public static function newDocumentPHP($markup = null, $contentType = "text/html") {
        // TODO pass charset to phpToMarkup if possible (use DOMDocumentWrapper function)
        $markup = phpQuery::phpToMarkup($markup, self::$defaultCharset);
        return self::newDocument($markup, $contentType);
    }
    public static function phpToMarkup($php, $charset = 'utf-8') {
        $regexes = array(
            '@(<(?!\\?)(?:[^>]|\\?>)+\\w+\\s*=\\s*)(\')([^\']*)<'.'?php?(.*?)(?:\\?>)([^\']*)\'@s',
            '@(<(?!\\?)(?:[^>]|\\?>)+\\w+\\s*=\\s*)(")([^"]*)<'.'?php?(.*?)(?:\\?>)([^"]*)"@s',
        );
        foreach($regexes as $regex)
            while (preg_match($regex, $php, $matches)) {
                $php = preg_replace_callback(
                    $regex,
//                  create_function('$m, $charset = "'.$charset.'"',
//                      'return $m[1].$m[2]
//                          .htmlspecialchars("<"."?php".$m[4]."?".">", ENT_QUOTES|ENT_NOQUOTES, $charset)
//                          .$m[5].$m[2];'
//                  ),
                    array('phpQuery', '_phpToMarkupCallback'),
                    $php
                );
            }
        $regex = '@(^|>[^<]*)+?(<\?php(.*?)(\?>))@s';
//preg_match_all($regex, $php, $matches);
//var_dump($matches);
        $php = preg_replace($regex, '\\1<php><!-- \\3 --></php>', $php);
        return $php;
    }
    public static function _phpToMarkupCallback($php, $charset = 'utf-8') {
        return $m[1].$m[2]
            .htmlspecialchars("<"."?php".$m[4]."?".">", ENT_QUOTES|ENT_NOQUOTES, $charset)
            .$m[5].$m[2];
    }
    public static function _markupToPHPCallback($m) {
        return "<"."?php ".htmlspecialchars_decode($m[1])." ?".">";
    }
    /**
     * Converts document markup containing PHP code generated by phpQuery::php()
     * into valid (executable) PHP code syntax.
     *
     * @param string|phpQueryObject $content
     * @return string PHP code.
     */
    public static function markupToPHP($content) {
        if ($content instanceof phpQueryObject)
            $content = $content->markupOuter();
        /* <php>...</php> to <?php...? > */
        $content = preg_replace_callback(
            '@<php>\s*<!--(.*?)-->\s*</php>@s',
//          create_function('$m',
//              'return "<'.'?php ".htmlspecialchars_decode($m[1])." ?'.'>";'
//          ),
            array('phpQuery', '_markupToPHPCallback'),
            $content
        );
        /* <node attr='< ?php ? >'> extra space added to save highlighters */
        $regexes = array(
            '@(<(?!\\?)(?:[^>]|\\?>)+\\w+\\s*=\\s*)(\')([^\']*)(?:&lt;|%3C)\\?(?:php)?(.*?)(?:\\?(?:&gt;|%3E))([^\']*)\'@s',
            '@(<(?!\\?)(?:[^>]|\\?>)+\\w+\\s*=\\s*)(")([^"]*)(?:&lt;|%3C)\\?(?:php)?(.*?)(?:\\?(?:&gt;|%3E))([^"]*)"@s',
        );
        foreach($regexes as $regex)
            while (preg_match($regex, $content))
                $content = preg_replace_callback(
                    $regex,
                    create_function('$m',
                        'return $m[1].$m[2].$m[3]."<?php "
                            .str_replace(
                                array("%20", "%3E", "%09", "&#10;", "&#9;", "%7B", "%24", "%7D", "%22", "%5B", "%5D"),
                                array(" ", ">", "   ", "\n", "  ", "{", "$", "}", \'"\', "[", "]"),
                                htmlspecialchars_decode($m[4])
                            )
                            ." ?>".$m[5].$m[2];'
                    ),
                    $content
                );
        return $content;
    }
    /**
     * Creates new document from file $file.
     * Chainable.
     *
     * @param string $file URLs allowed. See File wrapper page at php.net for more supported sources.
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public static function newDocumentFile($file, $contentType = null) {
        $documentID = self::createDocumentWrapper(
            file_get_contents($file), $contentType
        );
        return new phpQueryObject($documentID);
    }
    /**
     * Creates new document from markup.
     * Chainable.
     *
     * @param unknown_type $markup
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public static function newDocumentFileHTML($file, $charset = null) {
        $contentType = $charset
            ? ";charset=$charset"
            : '';
        return self::newDocumentFile($file, "text/html{$contentType}");
    }
    /**
     * Creates new document from markup.
     * Chainable.
     *
     * @param unknown_type $markup
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public static function newDocumentFileXML($file, $charset = null) {
        $contentType = $charset
            ? ";charset=$charset"
            : '';
        return self::newDocumentFile($file, "text/xml{$contentType}");
    }
    /**
     * Creates new document from markup.
     * Chainable.
     *
     * @param unknown_type $markup
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public static function newDocumentFileXHTML($file, $charset = null) {
        $contentType = $charset
            ? ";charset=$charset"
            : '';
        return self::newDocumentFile($file, "application/xhtml+xml{$contentType}");
    }
    /**
     * Creates new document from markup.
     * Chainable.
     *
     * @param unknown_type $markup
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public static function newDocumentFilePHP($file, $contentType = null) {
        return self::newDocumentPHP(file_get_contents($file), $contentType);
    }
    /**
     * Reuses existing DOMDocument object.
     * Chainable.
     *
     * @param $document DOMDocument
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @TODO support DOMDocument
     */
    public static function loadDocument($document) {
        // TODO
        die('TODO loadDocument');
    }
    /**
     * Enter description here...
     *
     * @param unknown_type $html
     * @param unknown_type $domId
     * @return unknown New DOM ID
     * @todo support PHP tags in input
     * @todo support passing DOMDocument object from self::loadDocument
     */
    protected static function createDocumentWrapper($html, $contentType = null, $documentID = null) {
        if (function_exists('domxml_open_mem'))
            throw new Exception("Old PHP4 DOM XML extension detected. phpQuery won't work until this extension is enabled.");
//      $id = $documentID
//          ? $documentID
//          : md5(microtime());
        $document = null;
        if ($html instanceof DOMDOCUMENT) {
            if (self::getDocumentID($html)) {
                // document already exists in phpQuery::$documents, make a copy
                $document = clone $html;
            } else {
                // new document, add it to phpQuery::$documents
                $wrapper = new DOMDocumentWrapper($html, $contentType, $documentID);
            }
        } else {
            $wrapper = new DOMDocumentWrapper($html, $contentType, $documentID);
        }
//      $wrapper->id = $id;
        // bind document
        phpQuery::$documents[$wrapper->id] = $wrapper;
        // remember last loaded document
        phpQuery::selectDocument($wrapper->id);
        return $wrapper->id;
    }
    /**
     * Extend class namespace.
     *
     * @param string|array $target
     * @param array $source
     * @TODO support string $source
     * @return unknown_type
     */
    public static function extend($target, $source) {
        switch($target) {
            case 'phpQueryObject':
                $targetRef = &self::$extendMethods;
                $targetRef2 = &self::$pluginsMethods;
                break;
            case 'phpQuery':
                $targetRef = &self::$extendStaticMethods;
                $targetRef2 = &self::$pluginsStaticMethods;
                break;
            default:
                throw new Exception("Unsupported \$target type");
        }
        if (is_string($source))
            $source = array($source => $source);
        foreach($source as $method => $callback) {
            if (isset($targetRef[$method])) {
//              throw new Exception
                self::debug("Duplicate method '{$method}', can\'t extend '{$target}'");
                continue;
            }
            if (isset($targetRef2[$method])) {
//              throw new Exception
                self::debug("Duplicate method '{$method}' from plugin '{$targetRef2[$method]}',"
                    ." can\'t extend '{$target}'");
                continue;
            }
            $targetRef[$method] = $callback;
        }
        return true;
    }
    /**
     * Extend phpQuery with $class from $file.
     *
     * @param string $class Extending class name. Real class name can be prepended phpQuery_.
     * @param string $file Filename to include. Defaults to "{$class}.php".
     */
    public static function plugin($class, $file = null) {
        // TODO $class checked agains phpQuery_$class
//      if (strpos($class, 'phpQuery') === 0)
//          $class = substr($class, 8);
        if (in_array($class, self::$pluginsLoaded))
            return true;
        if (! $file)
            $file = $class.'.php';
        $objectClassExists = class_exists('phpQueryObjectPlugin_'.$class);
        $staticClassExists = class_exists('phpQueryPlugin_'.$class);
        if (! $objectClassExists && ! $staticClassExists)
            require_once($file);
        self::$pluginsLoaded[] = $class;
        // static methods
        if (class_exists('phpQueryPlugin_'.$class)) {
            $realClass = 'phpQueryPlugin_'.$class;
            $vars = get_class_vars($realClass);
            $loop = isset($vars['phpQueryMethods'])
                && ! is_null($vars['phpQueryMethods'])
                ? $vars['phpQueryMethods']
                : get_class_methods($realClass);
            foreach($loop as $method) {
                if ($method == '__initialize')
                    continue;
                if (! is_callable(array($realClass, $method)))
                    continue;
                if (isset(self::$pluginsStaticMethods[$method])) {
                    throw new Exception("Duplicate method '{$method}' from plugin '{$c}' conflicts with same method from plugin '".self::$pluginsStaticMethods[$method]."'");
                    return;
                }
                self::$pluginsStaticMethods[$method] = $class;
            }
            if (method_exists($realClass, '__initialize'))
                call_user_func_array(array($realClass, '__initialize'), array());
        }
        // object methods
        if (class_exists('phpQueryObjectPlugin_'.$class)) {
            $realClass = 'phpQueryObjectPlugin_'.$class;
            $vars = get_class_vars($realClass);
            $loop = isset($vars['phpQueryMethods'])
                && ! is_null($vars['phpQueryMethods'])
                ? $vars['phpQueryMethods']
                : get_class_methods($realClass);
            foreach($loop as $method) {
                if (! is_callable(array($realClass, $method)))
                    continue;
                if (isset(self::$pluginsMethods[$method])) {
                    throw new Exception("Duplicate method '{$method}' from plugin '{$c}' conflicts with same method from plugin '".self::$pluginsMethods[$method]."'");
                    continue;
                }
                self::$pluginsMethods[$method] = $class;
            }
        }
        return true;
    }
    /**
     * Unloades all or specified document from memory.
     *
     * @param mixed $documentID @see phpQuery::getDocumentID() for supported types.
     */
    public static function unloadDocuments($id = null) {
        if (isset($id)) {
            if ($id = self::getDocumentID($id))
                unset(phpQuery::$documents[$id]);
        } else {
            foreach(phpQuery::$documents as $k => $v) {
                unset(phpQuery::$documents[$k]);
            }
        }
    }
    /**
     * Parses phpQuery object or HTML result against PHP tags and makes them active.
     *
     * @param phpQuery|string $content
     * @deprecated
     * @return string
     */
    public static function unsafePHPTags($content) {
        return self::markupToPHP($content);
    }
    public static function DOMNodeListToArray($DOMNodeList) {
        $array = array();
        if (! $DOMNodeList)
            return $array;
        foreach($DOMNodeList as $node)
            $array[] = $node;
        return $array;
    }
    /**
     * Checks if $input is HTML string, which has to start with '<'.
     *
     * @deprecated
     * @param String $input
     * @return Bool
     * @todo still used ?
     */
    public static function isMarkup($input) {
        return ! is_array($input) && substr(trim($input), 0, 1) == '<';
    }
    public static function debug($text) {
        if (self::$debug)
            print var_dump($text);
    }
    /**
     * Make an AJAX request.
     *
     * @param array See $options http://docs.jquery.com/Ajax/jQuery.ajax#toptions
     * Additional options are:
     * 'document' - document for global events, @see phpQuery::getDocumentID()
     * 'referer' - implemented
     * 'requested_with' - TODO; not implemented (X-Requested-With)
     * @return Zend_Http_Client
     * @link http://docs.jquery.com/Ajax/jQuery.ajax
     *
     * @TODO $options['cache']
     * @TODO $options['processData']
     * @TODO $options['xhr']
     * @TODO $options['data'] as string
     * @TODO XHR interface
     */
    public static function ajax($options = array(), $xhr = null) {
        $options = array_merge(
            self::$ajaxSettings, $options
        );
        $documentID = isset($options['document'])
            ? self::getDocumentID($options['document'])
            : null;
        if ($xhr) {
            // reuse existing XHR object, but clean it up
            $client = $xhr;
//          $client->setParameterPost(null);
//          $client->setParameterGet(null);
            $client->setAuth(false);
            $client->setHeaders("If-Modified-Since", null);
            $client->setHeaders("Referer", null);
            $client->resetParameters();
        } else {
            // create new XHR object
            require_once('Zend/Http/Client.php');
            $client = new Zend_Http_Client();
            $client->setCookieJar();
        }
        if (isset($options['timeout']))
            $client->setConfig(array(
                'timeout'      => $options['timeout'],
            ));
//          'maxredirects' => 0,
        foreach(self::$ajaxAllowedHosts as $k => $host)
            if ($host == '.' && isset($_SERVER['HTTP_HOST']))
                self::$ajaxAllowedHosts[$k] = $_SERVER['HTTP_HOST'];
        $host = parse_url($options['url'], PHP_URL_HOST);
        if (! in_array($host, self::$ajaxAllowedHosts)) {
            throw new Exception("Request not permitted, host '$host' not present in "
                ."phpQuery::\$ajaxAllowedHosts");
        }
        // JSONP
        $jsre = "/=\\?(&|$)/";
        if (isset($options['dataType']) && $options['dataType'] == 'jsonp') {
            $jsonpCallbackParam = $options['jsonp']
                ? $options['jsonp'] : 'callback';
            if (strtolower($options['type']) == 'get') {
                if (! preg_match($jsre, $options['url'])) {
                    $sep = strpos($options['url'], '?')
                        ? '&' : '?';
                    $options['url'] .= "$sep$jsonpCallbackParam=?";
                }
            } else if ($options['data']) {
                $jsonp = false;
                foreach($options['data'] as $n => $v) {
                    if ($v == '?')
                        $jsonp = true;
                }
                if (! $jsonp) {
                    $options['data'][$jsonpCallbackParam] = '?';
                }
            }
            $options['dataType'] = 'json';
        }
        if (isset($options['dataType']) && $options['dataType'] == 'json') {
            $jsonpCallback = 'json_'.md5(microtime());
            $jsonpData = $jsonpUrl = false;
            if ($options['data']) {
                foreach($options['data'] as $n => $v) {
                    if ($v == '?')
                        $jsonpData = $n;
                }
            }
            if (preg_match($jsre, $options['url']))
                $jsonpUrl = true;
            if ($jsonpData !== false || $jsonpUrl) {
                // remember callback name for httpData()
                $options['_jsonp'] = $jsonpCallback;
                if ($jsonpData !== false)
                    $options['data'][$jsonpData] = $jsonpCallback;
                if ($jsonpUrl)
                    $options['url'] = preg_replace($jsre, "=$jsonpCallback\\1", $options['url']);
            }
        }
        $client->setUri($options['url']);
        $client->setMethod(strtoupper($options['type']));
        if (isset($options['referer']) && $options['referer'])
            $client->setHeaders('Referer', $options['referer']);
        $client->setHeaders(array(
//          'content-type' => $options['contentType'],
            'User-Agent' => 'Mozilla/5.0 (X11; U; Linux x86; en-US; rv:1.9.0.5) Gecko'
                 .'/2008122010 Firefox/3.0.5',
            // TODO custom charset
            'Accept-Charset' => 'ISO-8859-1,utf-8;q=0.7,*;q=0.7',
//          'Connection' => 'keep-alive',
//          'Accept' => 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
            'Accept-Language' => 'en-us,en;q=0.5',
        ));
        if ($options['username'])
            $client->setAuth($options['username'], $options['password']);
        if (isset($options['ifModified']) && $options['ifModified'])
            $client->setHeaders("If-Modified-Since",
                self::$lastModified
                    ? self::$lastModified
                    : "Thu, 01 Jan 1970 00:00:00 GMT"
            );
        $client->setHeaders("Accept",
            isset($options['dataType'])
            && isset(self::$ajaxSettings['accepts'][ $options['dataType'] ])
                ? self::$ajaxSettings['accepts'][ $options['dataType'] ].", */*"
                : self::$ajaxSettings['accepts']['_default']
        );
        // TODO $options['processData']
        if ($options['data'] instanceof phpQueryObject) {
            $serialized = $options['data']->serializeArray($options['data']);
            $options['data'] = array();
            foreach($serialized as $r)
                $options['data'][ $r['name'] ] = $r['value'];
        }
        if (strtolower($options['type']) == 'get') {
            $client->setParameterGet($options['data']);
        } else if (strtolower($options['type']) == 'post') {
            $client->setEncType($options['contentType']);
            $client->setParameterPost($options['data']);
        }
        if (self::$active == 0 && $options['global'])
            phpQueryEvents::trigger($documentID, 'ajaxStart');
        self::$active++;
        // beforeSend callback
        if (isset($options['beforeSend']) && $options['beforeSend'])
            phpQuery::callbackRun($options['beforeSend'], array($client));
        // ajaxSend event
        if ($options['global'])
            phpQueryEvents::trigger($documentID, 'ajaxSend', array($client, $options));
        if (phpQuery::$debug) {
            self::debug("{$options['type']}: {$options['url']}\n");
            self::debug("Options: <pre>".var_export($options, true)."</pre>\n");
//          if ($client->getCookieJar())
//              self::debug("Cookies: <pre>".var_export($client->getCookieJar()->getMatchingCookies($options['url']), true)."</pre>\n");
        }
        // request
        $response = $client->request();
        if (phpQuery::$debug) {
            self::debug('Status: '.$response->getStatus().' / '.$response->getMessage());
            self::debug($client->getLastRequest());
            self::debug($response->getHeaders());
        }
        if ($response->isSuccessful()) {
            // XXX tempolary
            self::$lastModified = $response->getHeader('Last-Modified');
            $data = self::httpData($response->getBody(), $options['dataType'], $options);
            if (isset($options['success']) && $options['success'])
                phpQuery::callbackRun($options['success'], array($data, $response->getStatus(), $options));
            if ($options['global'])
                phpQueryEvents::trigger($documentID, 'ajaxSuccess', array($client, $options));
        } else {
            if (isset($options['error']) && $options['error'])
                phpQuery::callbackRun($options['error'], array($client, $response->getStatus(), $response->getMessage()));
            if ($options['global'])
                phpQueryEvents::trigger($documentID, 'ajaxError', array($client, /*$response->getStatus(),*/$response->getMessage(), $options));
        }
        if (isset($options['complete']) && $options['complete'])
            phpQuery::callbackRun($options['complete'], array($client, $response->getStatus()));
        if ($options['global'])
            phpQueryEvents::trigger($documentID, 'ajaxComplete', array($client, $options));
        if ($options['global'] && ! --self::$active)
            phpQueryEvents::trigger($documentID, 'ajaxStop');
        return $client;
//      if (is_null($domId))
//          $domId = self::$defaultDocumentID ? self::$defaultDocumentID : false;
//      return new phpQueryAjaxResponse($response, $domId);
    }
    protected static function httpData($data, $type, $options) {
        if (isset($options['dataFilter']) && $options['dataFilter'])
            $data = self::callbackRun($options['dataFilter'], array($data, $type));
        if (is_string($data)) {
            if ($type == "json") {
                if (isset($options['_jsonp']) && $options['_jsonp']) {
                    $data = preg_replace('/^\s*\w+\((.*)\)\s*$/s', '$1', $data);
                }
                $data = self::parseJSON($data);
            }
        }
        return $data;
    }
    /**
     * Enter description here...
     *
     * @param array|phpQuery $data
     *
     */
    public static function param($data) {
        return http_build_query($data, null, '&');
    }
    public static function get($url, $data = null, $callback = null, $type = null) {
        if (!is_array($data)) {
            $callback = $data;
            $data = null;
        }
        // TODO some array_values on this shit
        return phpQuery::ajax(array(
            'type' => 'GET',
            'url' => $url,
            'data' => $data,
            'success' => $callback,
            'dataType' => $type,
        ));
    }
    public static function post($url, $data = null, $callback = null, $type = null) {
        if (!is_array($data)) {
            $callback = $data;
            $data = null;
        }
        return phpQuery::ajax(array(
            'type' => 'POST',
            'url' => $url,
            'data' => $data,
            'success' => $callback,
            'dataType' => $type,
        ));
    }
    public static function getJSON($url, $data = null, $callback = null) {
        if (!is_array($data)) {
            $callback = $data;
            $data = null;
        }
        // TODO some array_values on this shit
        return phpQuery::ajax(array(
            'type' => 'GET',
            'url' => $url,
            'data' => $data,
            'success' => $callback,
            'dataType' => 'json',
        ));
    }
    public static function ajaxSetup($options) {
        self::$ajaxSettings = array_merge(
            self::$ajaxSettings,
            $options
        );
    }
    public static function ajaxAllowHost($host1, $host2 = null, $host3 = null) {
        $loop = is_array($host1)
            ? $host1
            : func_get_args();
        foreach($loop as $host) {
            if ($host && ! in_array($host, phpQuery::$ajaxAllowedHosts)) {
                phpQuery::$ajaxAllowedHosts[] = $host;
            }
        }
    }
    public static function ajaxAllowURL($url1, $url2 = null, $url3 = null) {
        $loop = is_array($url1)
            ? $url1
            : func_get_args();
        foreach($loop as $url)
            phpQuery::ajaxAllowHost(parse_url($url, PHP_URL_HOST));
    }
    /**
     * Returns JSON representation of $data.
     *
     * @static
     * @param mixed $data
     * @return string
     */
    public static function toJSON($data) {
        if (function_exists('json_encode'))
            return json_encode($data);
        require_once('Zend/Json/Encoder.php');
        return Zend_Json_Encoder::encode($data);
    }
    /**
     * Parses JSON into proper PHP type.
     *
     * @static
     * @param string $json
     * @return mixed
     */
    public static function parseJSON($json) {
        if (function_exists('json_decode')) {
            $return = json_decode(trim($json), true);
            // json_decode and UTF8 issues
            if (isset($return))
                return $return;
        }
        require_once('Zend/Json/Decoder.php');
        return Zend_Json_Decoder::decode($json);
    }
    /**
     * Returns source's document ID.
     *
     * @param $source DOMNode|phpQueryObject
     * @return string
     */
    public static function getDocumentID($source) {
        if ($source instanceof DOMDOCUMENT) {
            foreach(phpQuery::$documents as $id => $document) {
                if ($source->isSameNode($document->document))
                    return $id;
            }
        } else if ($source instanceof DOMNODE) {
            foreach(phpQuery::$documents as $id => $document) {
                if ($source->ownerDocument->isSameNode($document->document))
                    return $id;
            }
        } else if ($source instanceof phpQueryObject)
            return $source->getDocumentID();
        else if (is_string($source) && isset(phpQuery::$documents[$source]))
            return $source;
    }
    /**
     * Get DOMDocument object related to $source.
     * Returns null if such document doesn't exist.
     *
     * @param $source DOMNode|phpQueryObject|string
     * @return string
     */
    public static function getDOMDocument($source) {
        if ($source instanceof DOMDOCUMENT)
            return $source;
        $source = self::getDocumentID($source);
        return $source
            ? self::$documents[$id]['document']
            : null;
    }

    // UTILITIES
    // http://docs.jquery.com/Utilities

    /**
     *
     * @return unknown_type
     * @link http://docs.jquery.com/Utilities/jQuery.makeArray
     */
    public static function makeArray($obj) {
        $array = array();
        if (is_object($object) && $object instanceof DOMNODELIST) {
            foreach($object as $value)
                $array[] = $value;
        } else if (is_object($object) && ! ($object instanceof Iterator)) {
            foreach(get_object_vars($object) as $name => $value)
                $array[0][$name] = $value;
        } else {
            foreach($object as $name => $value)
                $array[0][$name] = $value;
        }
        return $array;
    }
    public static function inArray($value, $array) {
        return in_array($value, $array);
    }
    /**
     *
     * @param $object
     * @param $callback
     * @return unknown_type
     * @link http://docs.jquery.com/Utilities/jQuery.each
     */
    public static function each($object, $callback, $param1 = null, $param2 = null, $param3 = null) {
        $paramStructure = null;
        if (func_num_args() > 2) {
            $paramStructure = func_get_args();
            $paramStructure = array_slice($paramStructure, 2);
        }
        if (is_object($object) && ! ($object instanceof Iterator)) {
            foreach(get_object_vars($object) as $name => $value)
                phpQuery::callbackRun($callback, array($name, $value), $paramStructure);
        } else {
            foreach($object as $name => $value)
                phpQuery::callbackRun($callback, array($name, $value), $paramStructure);
        }
    }
    /**
     *
     * @link http://docs.jquery.com/Utilities/jQuery.map
     */
    public static function map($array, $callback, $param1 = null, $param2 = null, $param3 = null) {
        $result = array();
        $paramStructure = null;
        if (func_num_args() > 2) {
            $paramStructure = func_get_args();
            $paramStructure = array_slice($paramStructure, 2);
        }
        foreach($array as $v) {
            $vv = phpQuery::callbackRun($callback, array($v), $paramStructure);
//          $callbackArgs = $args;
//          foreach($args as $i => $arg) {
//              $callbackArgs[$i] = $arg instanceof CallbackParam
//                  ? $v
//                  : $arg;
//          }
//          $vv = call_user_func_array($callback, $callbackArgs);
            if (is_array($vv))  {
                foreach($vv as $vvv)
                    $result[] = $vvv;
            } else if ($vv !== null) {
                $result[] = $vv;
            }
        }
        return $result;
    }
    /**
     *
     * @param $callback Callback
     * @param $params
     * @param $paramStructure
     * @return unknown_type
     */
    public static function callbackRun($callback, $params = array(), $paramStructure = null) {
        if (! $callback)
            return;
        if ($callback instanceof CallbackParameterToReference) {
            // TODO support ParamStructure to select which $param push to reference
            if (isset($params[0]))
                $callback->callback = $params[0];
            return true;
        }
        if ($callback instanceof Callback) {
            $paramStructure = $callback->params;
            $callback = $callback->callback;
        }
        if (! $paramStructure)
            return call_user_func_array($callback, $params);
        $p = 0;
        foreach($paramStructure as $i => $v) {
            $paramStructure[$i] = $v instanceof CallbackParam
                ? $params[$p++]
                : $v;
        }
        return call_user_func_array($callback, $paramStructure);
    }
    /**
     * Merge 2 phpQuery objects.
     * @param array $one
     * @param array $two
     * @protected
     * @todo node lists, phpQueryObject
     */
    public static function merge($one, $two) {
        $elements = $one->elements;
        foreach($two->elements as $node) {
            $exists = false;
            foreach($elements as $node2) {
                if ($node2->isSameNode($node))
                    $exists = true;
            }
            if (! $exists)
                $elements[] = $node;
        }
        return $elements;
//      $one = $one->newInstance();
//      $one->elements = $elements;
//      return $one;
    }
    /**
     *
     * @param $array
     * @param $callback
     * @param $invert
     * @return unknown_type
     * @link http://docs.jquery.com/Utilities/jQuery.grep
     */
    public static function grep($array, $callback, $invert = false) {
        $result = array();
        foreach($array as $k => $v) {
            $r = call_user_func_array($callback, array($v, $k));
            if ($r === !(bool)$invert)
                $result[] = $v;
        }
        return $result;
    }
    public static function unique($array) {
        return array_unique($array);
    }
    /**
     *
     * @param $function
     * @return unknown_type
     * @TODO there are problems with non-static methods, second parameter pass it
     *  but doesnt verify is method is really callable
     */
    public static function isFunction($function) {
        return is_callable($function);
    }
    public static function trim($str) {
        return trim($str);
    }
    /* PLUGINS NAMESPACE */
    /**
     *
     * @param $url
     * @param $callback
     * @param $param1
     * @param $param2
     * @param $param3
     * @return phpQueryObject
     */
    public static function browserGet($url, $callback, $param1 = null, $param2 = null, $param3 = null) {
        if (self::plugin('WebBrowser')) {
            $params = func_get_args();
            return self::callbackRun(array(self::$plugins, 'browserGet'), $params);
        } else {
            self::debug('WebBrowser plugin not available...');
        }
    }
    /**
     *
     * @param $url
     * @param $data
     * @param $callback
     * @param $param1
     * @param $param2
     * @param $param3
     * @return phpQueryObject
     */
    public static function browserPost($url, $data, $callback, $param1 = null, $param2 = null, $param3 = null) {
        if (self::plugin('WebBrowser')) {
            $params = func_get_args();
            return self::callbackRun(array(self::$plugins, 'browserPost'), $params);
        } else {
            self::debug('WebBrowser plugin not available...');
        }
    }
    /**
     *
     * @param $ajaxSettings
     * @param $callback
     * @param $param1
     * @param $param2
     * @param $param3
     * @return phpQueryObject
     */
    public static function browser($ajaxSettings, $callback, $param1 = null, $param2 = null, $param3 = null) {
        if (self::plugin('WebBrowser')) {
            $params = func_get_args();
            return self::callbackRun(array(self::$plugins, 'browser'), $params);
        } else {
            self::debug('WebBrowser plugin not available...');
        }
    }
    /**
     *
     * @param $code
     * @return string
     */
    public static function php($code) {
        return self::code('php', $code);
    }
    /**
     *
     * @param $type
     * @param $code
     * @return string
     */
    public static function code($type, $code) {
        return "<$type><!-- ".trim($code)." --></$type>";
    }

    public static function __callStatic($method, $params) {
        return call_user_func_array(
            array(phpQuery::$plugins, $method),
            $params
        );
    }
    protected static function dataSetupNode($node, $documentID) {
        // search are return if alredy exists
        foreach(phpQuery::$documents[$documentID]->dataNodes as $dataNode) {
            if ($node->isSameNode($dataNode))
                return $dataNode;
        }
        // if doesn't, add it
        phpQuery::$documents[$documentID]->dataNodes[] = $node;
        return $node;
    }
    protected static function dataRemoveNode($node, $documentID) {
        // search are return if alredy exists
        foreach(phpQuery::$documents[$documentID]->dataNodes as $k => $dataNode) {
            if ($node->isSameNode($dataNode)) {
                unset(self::$documents[$documentID]->dataNodes[$k]);
                unset(self::$documents[$documentID]->data[ $dataNode->dataID ]);
            }
        }
    }
    public static function data($node, $name, $data, $documentID = null) {
        if (! $documentID)
            // TODO check if this works
            $documentID = self::getDocumentID($node);
        $document = phpQuery::$documents[$documentID];
        $node = self::dataSetupNode($node, $documentID);
        if (! isset($node->dataID))
            $node->dataID = ++phpQuery::$documents[$documentID]->uuid;
        $id = $node->dataID;
        if (! isset($document->data[$id]))
            $document->data[$id] = array();
        if (! is_null($data))
            $document->data[$id][$name] = $data;
        if ($name) {
            if (isset($document->data[$id][$name]))
                return $document->data[$id][$name];
        } else
            return $id;
    }
    public static function removeData($node, $name, $documentID) {
        if (! $documentID)
            // TODO check if this works
            $documentID = self::getDocumentID($node);
        $document = phpQuery::$documents[$documentID];
        $node = self::dataSetupNode($node, $documentID);
        $id = $node->dataID;
        if ($name) {
            if (isset($document->data[$id][$name]))
                unset($document->data[$id][$name]);
            $name = null;
            foreach($document->data[$id] as $name)
                break;
            if (! $name)
                self::removeData($node, $name, $documentID);
        } else {
            self::dataRemoveNode($node, $documentID);
        }
    }
}
/**
 * Plugins static namespace class.
 *
 * @author Tobiasz Cudnik <tobiasz.cudnik/gmail.com>
 * @package phpQuery
 * @todo move plugin methods here (as statics)
 */
class phpQueryPlugins {
    public function __call($method, $args) {
        if (isset(phpQuery::$extendStaticMethods[$method])) {
            $return = call_user_func_array(
                phpQuery::$extendStaticMethods[$method],
                $args
            );
        } else if (isset(phpQuery::$pluginsStaticMethods[$method])) {
            $class = phpQuery::$pluginsStaticMethods[$method];
            $realClass = "phpQueryPlugin_$class";
            $return = call_user_func_array(
                array($realClass, $method),
                $args
            );
            return isset($return)
                ? $return
                : $this;
        } else
            throw new Exception("Method '{$method}' doesnt exist");
    }
}
/**
 * Shortcut to phpQuery::pq($arg1, $context)
 * Chainable.
 *
 * @see phpQuery::pq()
 * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
 * @author Tobiasz Cudnik <tobiasz.cudnik/gmail.com>
 * @package phpQuery
 */
function pq($arg1, $context = null) {
    $args = func_get_args();
    return call_user_func_array(
        array('phpQuery', 'pq'),
        $args
    );
}
// add plugins dir and Zend framework to include path
set_include_path(
    get_include_path()
        .PATH_SEPARATOR.dirname(__FILE__).'/phpQuery/'
        .PATH_SEPARATOR.dirname(__FILE__).'/phpQuery/plugins/'
);
// why ? no __call nor __get for statics in php...
// XXX __callStatic will be available in PHP 5.3
phpQuery::$plugins = new phpQueryPlugins();
// include bootstrap file (personal library config)
if (file_exists(dirname(__FILE__).'/phpQuery/bootstrap.php'))
    require_once dirname(__FILE__).'/phpQuery/bootstrap.php';