xref: /dokuwiki/inc/init.php (revision bad31ae944f074dab12f7a6d1362775d8f2b18dd)

<?php
/**
 * Initialize some defaults needed for DokuWiki
 */

  // define the include path
  if(!defined('DOKU_INC')) define('DOKU_INC',realpath(dirname(__FILE__).'/../').'/');

  // define config path (packagers may want to change this to /etc/dokuwiki/)
  if(!defined('DOKU_CONF')) define('DOKU_CONF',DOKU_INC.'conf/');

  // set up error reporting to sane values
  error_reporting(E_ALL ^ E_NOTICE);

  //prepare config array()
  global $conf;
  $conf = array();

  // load the config file(s)
  require_once(DOKU_CONF.'dokuwiki.php');
  @include_once(DOKU_CONF.'local.php');

  //prepare language array
  global $lang;
  $lang = array();

  //load the language files
  require_once(DOKU_INC.'inc/lang/en/lang.php');
  require_once(DOKU_INC.'inc/lang/'.$conf['lang'].'/lang.php');

  // define baseURL
  if(!defined('DOKU_BASE')) define('DOKU_BASE',getBaseURL());
  if(!defined('DOKU_URL'))  define('DOKU_URL',getBaseURL(true));

  // define Plugin dir
  if(!defined('DOKU_PLUGIN'))  define('DOKU_PLUGIN',DOKU_INC.'lib/plugins/');

  // define main script
  if(!defined('DOKU_SCRIPT')) define('DOKU_SCRIPT','doku.php');

  // define Template baseURL
  if(!defined('DOKU_TPL')) define('DOKU_TPL',
                                  DOKU_BASE.'lib/tpl/'.$conf['template'].'/');

  // make session rewrites XHTML compliant
  @ini_set('arg_separator.output', '&amp;');

  // init session
  if (!headers_sent() && !defined(NOSESSION)){
    session_name("DokuWiki");
    session_start();
  }

  // kill magic quotes
  if (get_magic_quotes_gpc()) {
    if (!empty($_GET))    remove_magic_quotes($_GET);
    if (!empty($_POST))   remove_magic_quotes($_POST);
    if (!empty($_COOKIE)) remove_magic_quotes($_COOKIE);
    if (!empty($_REQUEST)) remove_magic_quotes($_REQUEST);
    if (!empty($_SESSION)) remove_magic_quotes($_SESSION);
    @ini_set('magic_quotes_gpc', 0);
  }
  @set_magic_quotes_runtime(0);
  @ini_set('magic_quotes_sybase',0);

  // disable gzip if not available
  if($conf['usegzip'] && !function_exists('gzopen')){
    $conf['usegzip'] = 0;
  }

  // remember original umask
  $conf['oldumask'] = umask();

  // make real paths and check them
  init_paths();
  init_files();

  // automatic upgrade to script versions of certain files
  scriptify(DOKU_CONF.'users.auth');
  scriptify(DOKU_CONF.'acl.auth');


/**
 * Checks paths from config file
 */
function init_paths(){
  global $conf;

  $paths = array('datadir'   => 'pages',
                 'olddir'    => 'attic',
                 'mediadir'  => 'media',
                 'metadir'   => 'meta',
                 'cachedir'  => 'cache',
                 'lockdir'   => 'locks',
                 'changelog' => 'changes.log');

  foreach($paths as $c => $p){
    if(!$conf[$c])   $conf[$c] = $conf['savedir'].'/'.$p;
    $conf[$c]        = init_path($conf[$c]);
    if(!$conf[$c])   die("$c does not exist or isn't writable. Check config!");
  }
}

/**
 * Checks the existance of certain files and creates them if missing
 */
function init_files(){
  global $conf;
  $files = array( $conf['cachedir'].'/word.idx',
                  $conf['cachedir'].'/page.idx',
                  $conf['cachedir'].'/index.idx', );

  foreach($files as $file){
    if(!@file_exists($file)){
      $fh = fopen($file,'a');
      fclose($fh);
    }
  }
}

/**
 * returns absolute path
 *
 * This tries the given path first, then checks in DOKU_INC
 */
function init_path($path){
  $p = realpath($path);
  if(@file_exists($p)) return $p;
  $p = realpath(DOKU_INC.$path);
  if(@file_exists($p)) return $p;
  return '';
}

/**
 * remove magic quotes recursivly
 *
 * @author Andreas Gohr <andi@splitbrain.org>
 */
function remove_magic_quotes(&$array) {
  foreach (array_keys($array) as $key) {
    if (is_array($array[$key])) {
      remove_magic_quotes($array[$key]);
    }else {
      $array[$key] = stripslashes($array[$key]);
    }
  }
}

/**
 * Returns the full absolute URL to the directory where
 * DokuWiki is installed in (includes a trailing slash)
 *
 * @author Andreas Gohr <andi@splitbrain.org>
 */
function getBaseURL($abs=false){
  global $conf;
  //if canonical url enabled always return absolute
  if($conf['canonical']) $abs = true;

  if($conf['basedir']){
    $dir = $conf['basedir'].'/';
  }elseif(substr($_SERVER['SCRIPT_NAME'],-4) == '.php'){
    $dir = dirname($_SERVER['SCRIPT_NAME']).'/';
  }elseif(substr($_SERVER['PHP_SELF'],-4) == '.php'){
    $dir = dirname($_SERVER['PHP_SELF']).'/';
  }elseif($_SERVER['DOCUMENT_ROOT'] && $_SERVER['SCRIPT_FILENAME']){
    $dir = preg_replace ('/^'.preg_quote($_SERVER['DOCUMENT_ROOT'],'/').'/','',
                         $_SERVER['SCRIPT_FILENAME']);
    $dir = dirname('/'.$dir).'/';
  }else{
    $dir = './'; //probably wrong
  }

  $dir = str_replace('\\','/',$dir); #bugfix for weird WIN behaviour
  $dir = preg_replace('#//+#','/',$dir);

  //handle script in lib/exe dir
  $dir = preg_replace('!lib/exe/$!','',$dir);

  //finish here for relative URLs
  if(!$abs) return $dir;

  //use config option if available
  if($conf['baseurl']) return $conf['baseurl'].$dir;

  //split hostheader into host and port
  list($host,$port) = explode(':',$_SERVER['HTTP_HOST']);
  if(!$port)  $port = $_SERVER['SERVER_PORT'];
  if(!$port)  $port = 80;

  // see if HTTPS is enabled - apache leaves this empty when not available,
  // IIS sets it to 'off', 'false' and 'disabled' are just guessing
  if (preg_match('/^(|off|false|disabled)$/i',$_SERVER['HTTPS'])){
    $proto = 'http://';
    if ($port == '80') {
      $port='';
    }
  }else{
    $proto = 'https://';
    if ($port == '443') {
      $port='';
    }
  }

  if($port) $port = ':'.$port;

  return $proto.$host.$port.$dir;
}

/**
 * Append a PHP extension to a given file and adds an exit call
 *
 * This is used to migrate some old configfiles. An added PHP extension
 * ensures the contents are not shown to webusers even if .htaccess files
 * do not work
 *
 * @author Jan Decaluwe <jan@jandecaluwe.com>
 */
function scriptify($file) {
  // checks
  if (!is_readable($file)) {
    return;
  }
  $fn = $file.'.php';
  if (@file_exists($fn)) {
    return;
  }
  $fh = fopen($fn, 'w');
  if (!$fh) {
    die($fn.' is not writable!');
  }
  // write php exit hack first
  fwrite($fh, "# $fn\n");
  fwrite($fh, '# <?php exit()?>'."\n");
  fwrite($fh, "# Don't modify the lines above\n");
  fwrite($fh, "#\n");
  // copy existing lines
  $lines = file($file);
  foreach ($lines as $line){
    fwrite($fh, $line);
  }
  fclose($fh);
  //try to rename the old file
  @rename($file,"$file.old");
}


//Setup VIM: ex: et ts=2 enc=utf-8 :