1<?php
2
3declare(strict_types=1);
4/**
5 * SimplePie
6 *
7 * A PHP-Based RSS and Atom Feed Framework.
8 * Takes the hard work out of managing a complete RSS/Atom solution.
9 *
10 * Copyright (c) 2004-2022, Ryan Parman, Sam Sneddon, Ryan McCue, and contributors
11 * All rights reserved.
12 *
13 * Redistribution and use in source and binary forms, with or without modification, are
14 * permitted provided that the following conditions are met:
15 *
16 * 	* Redistributions of source code must retain the above copyright notice, this list of
17 * 	  conditions and the following disclaimer.
18 *
19 * 	* Redistributions in binary form must reproduce the above copyright notice, this list
20 * 	  of conditions and the following disclaimer in the documentation and/or other materials
21 * 	  provided with the distribution.
22 *
23 * 	* Neither the name of the SimplePie Team nor the names of its contributors may be used
24 * 	  to endorse or promote products derived from this software without specific prior
25 * 	  written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
28 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
29 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS
30 * AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
32 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
34 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 *
37 * @package SimplePie
38 * @copyright 2004-2016 Ryan Parman, Sam Sneddon, Ryan McCue
39 * @author Ryan Parman
40 * @author Sam Sneddon
41 * @author Ryan McCue
42 * @link http://simplepie.org/ SimplePie
43 * @license http://www.opensource.org/licenses/bsd-license.php BSD License
44 */
45
46namespace SimplePie;
47
48use SimplePie\XML\Declaration\Parser as DeclarationParser;
49
50/**
51 * Parses XML into something sane
52 *
53 *
54 * This class can be overloaded with {@see \SimplePie\SimplePie::set_parser_class()}
55 *
56 * @package SimplePie
57 * @subpackage Parsing
58 */
59class Parser implements RegistryAware
60{
61    public $error_code;
62    public $error_string;
63    public $current_line;
64    public $current_column;
65    public $current_byte;
66    public $separator = ' ';
67    public $namespace = [''];
68    public $element = [''];
69    public $xml_base = [''];
70    public $xml_base_explicit = [false];
71    public $xml_lang = [''];
72    public $data = [];
73    public $datas = [[]];
74    public $current_xhtml_construct = -1;
75    public $encoding;
76    protected $registry;
77
78    public function set_registry(\SimplePie\Registry $registry)/* : void */
79    {
80        $this->registry = $registry;
81    }
82
83    public function parse(&$data, $encoding, $url = '')
84    {
85        if (class_exists('DOMXpath') && function_exists('Mf2\parse')) {
86            $doc = new \DOMDocument();
87            @$doc->loadHTML($data);
88            $xpath = new \DOMXpath($doc);
89            // Check for both h-feed and h-entry, as both a feed with no entries
90            // and a list of entries without an h-feed wrapper are both valid.
91            $query = '//*[contains(concat(" ", @class, " "), " h-feed ") or '.
92                'contains(concat(" ", @class, " "), " h-entry ")]';
93            $result = $xpath->query($query);
94            if ($result->length !== 0) {
95                return $this->parse_microformats($data, $url);
96            }
97        }
98
99        // Use UTF-8 if we get passed US-ASCII, as every US-ASCII character is a UTF-8 character
100        if (strtoupper($encoding) === 'US-ASCII') {
101            $this->encoding = 'UTF-8';
102        } else {
103            $this->encoding = $encoding;
104        }
105
106        // Strip BOM:
107        // UTF-32 Big Endian BOM
108        if (substr($data, 0, 4) === "\x00\x00\xFE\xFF") {
109            $data = substr($data, 4);
110        }
111        // UTF-32 Little Endian BOM
112        elseif (substr($data, 0, 4) === "\xFF\xFE\x00\x00") {
113            $data = substr($data, 4);
114        }
115        // UTF-16 Big Endian BOM
116        elseif (substr($data, 0, 2) === "\xFE\xFF") {
117            $data = substr($data, 2);
118        }
119        // UTF-16 Little Endian BOM
120        elseif (substr($data, 0, 2) === "\xFF\xFE") {
121            $data = substr($data, 2);
122        }
123        // UTF-8 BOM
124        elseif (substr($data, 0, 3) === "\xEF\xBB\xBF") {
125            $data = substr($data, 3);
126        }
127
128        if (substr($data, 0, 5) === '<?xml' && strspn(substr($data, 5, 1), "\x09\x0A\x0D\x20") && ($pos = strpos($data, '?>')) !== false) {
129            $declaration = $this->registry->create(DeclarationParser::class, [substr($data, 5, $pos - 5)]);
130            if ($declaration->parse()) {
131                $data = substr($data, $pos + 2);
132                $data = '<?xml version="' . $declaration->version . '" encoding="' . $encoding . '" standalone="' . (($declaration->standalone) ? 'yes' : 'no') . '"?>' ."\n". $this->declare_html_entities() . $data;
133            } else {
134                $this->error_string = 'SimplePie bug! Please report this!';
135                return false;
136            }
137        }
138
139        $return = true;
140
141        static $xml_is_sane = null;
142        if ($xml_is_sane === null) {
143            $parser_check = xml_parser_create();
144            xml_parse_into_struct($parser_check, '<foo>&amp;</foo>', $values);
145            xml_parser_free($parser_check);
146            $xml_is_sane = isset($values[0]['value']);
147        }
148
149        // Create the parser
150        if ($xml_is_sane) {
151            $xml = xml_parser_create_ns($this->encoding, $this->separator);
152            xml_parser_set_option($xml, XML_OPTION_SKIP_WHITE, 1);
153            xml_parser_set_option($xml, XML_OPTION_CASE_FOLDING, 0);
154            xml_set_object($xml, $this);
155            xml_set_character_data_handler($xml, 'cdata');
156            xml_set_element_handler($xml, 'tag_open', 'tag_close');
157
158            // Parse!
159            $wrapper = @is_writable(sys_get_temp_dir()) ? 'php://temp' : 'php://memory';
160            if (($stream = fopen($wrapper, 'r+')) &&
161                fwrite($stream, $data) &&
162                rewind($stream)) {
163                //Parse by chunks not to use too much memory
164                do {
165                    $stream_data = fread($stream, 1048576);
166                    if (!xml_parse($xml, $stream_data === false ? '' : $stream_data, feof($stream))) {
167                        $this->error_code = xml_get_error_code($xml);
168                        $this->error_string = xml_error_string($this->error_code);
169                        $return = false;
170                        break;
171                    }
172                } while (!feof($stream));
173                fclose($stream);
174            } else {
175                $return = false;
176            }
177
178            $this->current_line = xml_get_current_line_number($xml);
179            $this->current_column = xml_get_current_column_number($xml);
180            $this->current_byte = xml_get_current_byte_index($xml);
181            xml_parser_free($xml);
182            return $return;
183        }
184
185        libxml_clear_errors();
186        $xml = new \XMLReader();
187        $xml->xml($data);
188        while (@$xml->read()) {
189            switch ($xml->nodeType) {
190                case constant('XMLReader::END_ELEMENT'):
191                    if ($xml->namespaceURI !== '') {
192                        $tagName = $xml->namespaceURI . $this->separator . $xml->localName;
193                    } else {
194                        $tagName = $xml->localName;
195                    }
196                    $this->tag_close(null, $tagName);
197                    break;
198                case constant('XMLReader::ELEMENT'):
199                    $empty = $xml->isEmptyElement;
200                    if ($xml->namespaceURI !== '') {
201                        $tagName = $xml->namespaceURI . $this->separator . $xml->localName;
202                    } else {
203                        $tagName = $xml->localName;
204                    }
205                    $attributes = [];
206                    while ($xml->moveToNextAttribute()) {
207                        if ($xml->namespaceURI !== '') {
208                            $attrName = $xml->namespaceURI . $this->separator . $xml->localName;
209                        } else {
210                            $attrName = $xml->localName;
211                        }
212                        $attributes[$attrName] = $xml->value;
213                    }
214                    $this->tag_open(null, $tagName, $attributes);
215                    if ($empty) {
216                        $this->tag_close(null, $tagName);
217                    }
218                    break;
219                case constant('XMLReader::TEXT'):
220
221                case constant('XMLReader::CDATA'):
222                    $this->cdata(null, $xml->value);
223                    break;
224            }
225        }
226        if ($error = libxml_get_last_error()) {
227            $this->error_code = $error->code;
228            $this->error_string = $error->message;
229            $this->current_line = $error->line;
230            $this->current_column = $error->column;
231            return false;
232        }
233
234        return true;
235    }
236
237    public function get_error_code()
238    {
239        return $this->error_code;
240    }
241
242    public function get_error_string()
243    {
244        return $this->error_string;
245    }
246
247    public function get_current_line()
248    {
249        return $this->current_line;
250    }
251
252    public function get_current_column()
253    {
254        return $this->current_column;
255    }
256
257    public function get_current_byte()
258    {
259        return $this->current_byte;
260    }
261
262    public function get_data()
263    {
264        return $this->data;
265    }
266
267    public function tag_open($parser, $tag, $attributes)
268    {
269        [$this->namespace[], $this->element[]] = $this->split_ns($tag);
270
271        $attribs = [];
272        foreach ($attributes as $name => $value) {
273            [$attrib_namespace, $attribute] = $this->split_ns($name);
274            $attribs[$attrib_namespace][$attribute] = $value;
275        }
276
277        if (isset($attribs[\SimplePie\SimplePie::NAMESPACE_XML]['base'])) {
278            $base = $this->registry->call(Misc::class, 'absolutize_url', [$attribs[\SimplePie\SimplePie::NAMESPACE_XML]['base'], end($this->xml_base)]);
279            if ($base !== false) {
280                $this->xml_base[] = $base;
281                $this->xml_base_explicit[] = true;
282            }
283        } else {
284            $this->xml_base[] = end($this->xml_base);
285            $this->xml_base_explicit[] = end($this->xml_base_explicit);
286        }
287
288        if (isset($attribs[\SimplePie\SimplePie::NAMESPACE_XML]['lang'])) {
289            $this->xml_lang[] = $attribs[\SimplePie\SimplePie::NAMESPACE_XML]['lang'];
290        } else {
291            $this->xml_lang[] = end($this->xml_lang);
292        }
293
294        if ($this->current_xhtml_construct >= 0) {
295            $this->current_xhtml_construct++;
296            if (end($this->namespace) === \SimplePie\SimplePie::NAMESPACE_XHTML) {
297                $this->data['data'] .= '<' . end($this->element);
298                if (isset($attribs[''])) {
299                    foreach ($attribs[''] as $name => $value) {
300                        $this->data['data'] .= ' ' . $name . '="' . htmlspecialchars($value, ENT_COMPAT, $this->encoding) . '"';
301                    }
302                }
303                $this->data['data'] .= '>';
304            }
305        } else {
306            $this->datas[] =& $this->data;
307            $this->data =& $this->data['child'][end($this->namespace)][end($this->element)][];
308            $this->data = ['data' => '', 'attribs' => $attribs, 'xml_base' => end($this->xml_base), 'xml_base_explicit' => end($this->xml_base_explicit), 'xml_lang' => end($this->xml_lang)];
309            if ((end($this->namespace) === \SimplePie\SimplePie::NAMESPACE_ATOM_03 && in_array(end($this->element), ['title', 'tagline', 'copyright', 'info', 'summary', 'content']) && isset($attribs['']['mode']) && $attribs['']['mode'] === 'xml')
310            || (end($this->namespace) === \SimplePie\SimplePie::NAMESPACE_ATOM_10 && in_array(end($this->element), ['rights', 'subtitle', 'summary', 'info', 'title', 'content']) && isset($attribs['']['type']) && $attribs['']['type'] === 'xhtml')
311            || (end($this->namespace) === \SimplePie\SimplePie::NAMESPACE_RSS_20 && in_array(end($this->element), ['title']))
312            || (end($this->namespace) === \SimplePie\SimplePie::NAMESPACE_RSS_090 && in_array(end($this->element), ['title']))
313            || (end($this->namespace) === \SimplePie\SimplePie::NAMESPACE_RSS_10 && in_array(end($this->element), ['title']))) {
314                $this->current_xhtml_construct = 0;
315            }
316        }
317    }
318
319    public function cdata($parser, $cdata)
320    {
321        if ($this->current_xhtml_construct >= 0) {
322            $this->data['data'] .= htmlspecialchars($cdata, ENT_QUOTES, $this->encoding);
323        } else {
324            $this->data['data'] .= $cdata;
325        }
326    }
327
328    public function tag_close($parser, $tag)
329    {
330        if ($this->current_xhtml_construct >= 0) {
331            $this->current_xhtml_construct--;
332            if (end($this->namespace) === \SimplePie\SimplePie::NAMESPACE_XHTML && !in_array(end($this->element), ['area', 'base', 'basefont', 'br', 'col', 'frame', 'hr', 'img', 'input', 'isindex', 'link', 'meta', 'param'])) {
333                $this->data['data'] .= '</' . end($this->element) . '>';
334            }
335        }
336        if ($this->current_xhtml_construct === -1) {
337            $this->data =& $this->datas[count($this->datas) - 1];
338            array_pop($this->datas);
339        }
340
341        array_pop($this->element);
342        array_pop($this->namespace);
343        array_pop($this->xml_base);
344        array_pop($this->xml_base_explicit);
345        array_pop($this->xml_lang);
346    }
347
348    public function split_ns($string)
349    {
350        static $cache = [];
351        if (!isset($cache[$string])) {
352            if ($pos = strpos($string, $this->separator)) {
353                static $separator_length;
354                if (!$separator_length) {
355                    $separator_length = strlen($this->separator);
356                }
357                $namespace = substr($string, 0, $pos);
358                $local_name = substr($string, $pos + $separator_length);
359                if (strtolower($namespace) === \SimplePie\SimplePie::NAMESPACE_ITUNES) {
360                    $namespace = \SimplePie\SimplePie::NAMESPACE_ITUNES;
361                }
362
363                // Normalize the Media RSS namespaces
364                if ($namespace === \SimplePie\SimplePie::NAMESPACE_MEDIARSS_WRONG ||
365                    $namespace === \SimplePie\SimplePie::NAMESPACE_MEDIARSS_WRONG2 ||
366                    $namespace === \SimplePie\SimplePie::NAMESPACE_MEDIARSS_WRONG3 ||
367                    $namespace === \SimplePie\SimplePie::NAMESPACE_MEDIARSS_WRONG4 ||
368                    $namespace === \SimplePie\SimplePie::NAMESPACE_MEDIARSS_WRONG5) {
369                    $namespace = \SimplePie\SimplePie::NAMESPACE_MEDIARSS;
370                }
371                $cache[$string] = [$namespace, $local_name];
372            } else {
373                $cache[$string] = ['', $string];
374            }
375        }
376        return $cache[$string];
377    }
378
379    private function parse_hcard($data, $category = false)
380    {
381        $name = '';
382        $link = '';
383        // Check if h-card is set and pass that information on in the link.
384        if (isset($data['type']) && in_array('h-card', $data['type'])) {
385            if (isset($data['properties']['name'][0])) {
386                $name = $data['properties']['name'][0];
387            }
388            if (isset($data['properties']['url'][0])) {
389                $link = $data['properties']['url'][0];
390                if ($name === '') {
391                    $name = $link;
392                } else {
393                    // can't have commas in categories.
394                    $name = str_replace(',', '', $name);
395                }
396                $person_tag = $category ? '<span class="person-tag"></span>' : '';
397                return '<a class="h-card" href="'.$link.'">'.$person_tag.$name.'</a>';
398            }
399        }
400        return $data['value'] ?? '';
401    }
402
403    private function parse_microformats(&$data, $url)
404    {
405        $feed_title = '';
406        $feed_author = null;
407        $author_cache = [];
408        $items = [];
409        $entries = [];
410        $mf = \Mf2\parse($data, $url);
411        // First look for an h-feed.
412        $h_feed = [];
413        foreach ($mf['items'] as $mf_item) {
414            if (in_array('h-feed', $mf_item['type'])) {
415                $h_feed = $mf_item;
416                break;
417            }
418            // Also look for h-feed or h-entry in the children of each top level item.
419            if (!isset($mf_item['children'][0]['type'])) {
420                continue;
421            }
422            if (in_array('h-feed', $mf_item['children'][0]['type'])) {
423                $h_feed = $mf_item['children'][0];
424                // In this case the parent of the h-feed may be an h-card, so use it as
425                // the feed_author.
426                if (in_array('h-card', $mf_item['type'])) {
427                    $feed_author = $mf_item;
428                }
429                break;
430            } elseif (in_array('h-entry', $mf_item['children'][0]['type'])) {
431                $entries = $mf_item['children'];
432                // In this case the parent of the h-entry list may be an h-card, so use
433                // it as the feed_author.
434                if (in_array('h-card', $mf_item['type'])) {
435                    $feed_author = $mf_item;
436                }
437                break;
438            }
439        }
440        if (isset($h_feed['children'])) {
441            $entries = $h_feed['children'];
442            // Also set the feed title and store author from the h-feed if available.
443            if (isset($mf['items'][0]['properties']['name'][0])) {
444                $feed_title = $mf['items'][0]['properties']['name'][0];
445            }
446            if (isset($mf['items'][0]['properties']['author'][0])) {
447                $feed_author = $mf['items'][0]['properties']['author'][0];
448            }
449        } elseif (count($entries) === 0) {
450            $entries = $mf['items'];
451        }
452        for ($i = 0; $i < count($entries); $i++) {
453            $entry = $entries[$i];
454            if (in_array('h-entry', $entry['type'])) {
455                $item = [];
456                $title = '';
457                $description = '';
458                if (isset($entry['properties']['url'][0])) {
459                    $link = $entry['properties']['url'][0];
460                    if (isset($link['value'])) {
461                        $link = $link['value'];
462                    }
463                    $item['link'] = [['data' => $link]];
464                }
465                if (isset($entry['properties']['uid'][0])) {
466                    $guid = $entry['properties']['uid'][0];
467                    if (isset($guid['value'])) {
468                        $guid = $guid['value'];
469                    }
470                    $item['guid'] = [['data' => $guid]];
471                }
472                if (isset($entry['properties']['name'][0])) {
473                    $title = $entry['properties']['name'][0];
474                    if (isset($title['value'])) {
475                        $title = $title['value'];
476                    }
477                    $item['title'] = [['data' => $title]];
478                }
479                if (isset($entry['properties']['author'][0]) || isset($feed_author)) {
480                    // author is a special case, it can be plain text or an h-card array.
481                    // If it's plain text it can also be a url that should be followed to
482                    // get the actual h-card.
483                    $author = $entry['properties']['author'][0] ?? $feed_author;
484                    if (!is_string($author)) {
485                        $author = $this->parse_hcard($author);
486                    } elseif (strpos($author, 'http') === 0) {
487                        if (isset($author_cache[$author])) {
488                            $author = $author_cache[$author];
489                        } else {
490                            $mf = \Mf2\fetch($author);
491                            foreach ($mf['items'] as $hcard) {
492                                // Only interested in an h-card by itself in this case.
493                                if (!in_array('h-card', $hcard['type'])) {
494                                    continue;
495                                }
496                                // It must have a url property matching what we fetched.
497                                if (!isset($hcard['properties']['url']) ||
498                                        !(in_array($author, $hcard['properties']['url']))) {
499                                    continue;
500                                }
501                                // Save parse_hcard the trouble of finding the correct url.
502                                $hcard['properties']['url'][0] = $author;
503                                // Cache this h-card for the next h-entry to check.
504                                $author_cache[$author] = $this->parse_hcard($hcard);
505                                $author = $author_cache[$author];
506                                break;
507                            }
508                        }
509                    }
510                    $item['author'] = [['data' => $author]];
511                }
512                if (isset($entry['properties']['photo'][0])) {
513                    // If a photo is also in content, don't need to add it again here.
514                    $content = '';
515                    if (isset($entry['properties']['content'][0]['html'])) {
516                        $content = $entry['properties']['content'][0]['html'];
517                    }
518                    $photo_list = [];
519                    for ($j = 0; $j < count($entry['properties']['photo']); $j++) {
520                        $photo = $entry['properties']['photo'][$j];
521                        if (!empty($photo) && strpos($content, $photo) === false) {
522                            $photo_list[] = $photo;
523                        }
524                    }
525                    // When there's more than one photo show the first and use a lightbox.
526                    // Need a permanent, unique name for the image set, but don't have
527                    // anything unique except for the content itself, so use that.
528                    $count = count($photo_list);
529                    if ($count > 1) {
530                        $image_set_id = preg_replace('/[[:^alnum:]]/', '', $photo_list[0]);
531                        $description = '<p>';
532                        for ($j = 0; $j < $count; $j++) {
533                            $hidden = $j === 0 ? '' : 'class="hidden" ';
534                            $description .= '<a href="'.$photo_list[$j].'" '.$hidden.
535                                'data-lightbox="image-set-'.$image_set_id.'">'.
536                                '<img src="'.$photo_list[$j].'"></a>';
537                        }
538                        $description .= '<br><b>'.$count.' photos</b></p>';
539                    } elseif ($count == 1) {
540                        $description = '<p><img src="'.$photo_list[0].'"></p>';
541                    }
542                }
543                if (isset($entry['properties']['content'][0]['html'])) {
544                    // e-content['value'] is the same as p-name when they are on the same
545                    // element. Use this to replace title with a strip_tags version so
546                    // that alt text from images is not included in the title.
547                    if ($entry['properties']['content'][0]['value'] === $title) {
548                        $title = strip_tags($entry['properties']['content'][0]['html']);
549                        $item['title'] = [['data' => $title]];
550                    }
551                    $description .= $entry['properties']['content'][0]['html'];
552                    if (isset($entry['properties']['in-reply-to'][0])) {
553                        $in_reply_to = '';
554                        if (is_string($entry['properties']['in-reply-to'][0])) {
555                            $in_reply_to = $entry['properties']['in-reply-to'][0];
556                        } elseif (isset($entry['properties']['in-reply-to'][0]['value'])) {
557                            $in_reply_to = $entry['properties']['in-reply-to'][0]['value'];
558                        }
559                        if ($in_reply_to !== '') {
560                            $description .= '<p><span class="in-reply-to"></span> '.
561                                '<a href="'.$in_reply_to.'">'.$in_reply_to.'</a><p>';
562                        }
563                    }
564                    $item['description'] = [['data' => $description]];
565                }
566                if (isset($entry['properties']['category'])) {
567                    $category_csv = '';
568                    // Categories can also contain h-cards.
569                    foreach ($entry['properties']['category'] as $category) {
570                        if ($category_csv !== '') {
571                            $category_csv .= ', ';
572                        }
573                        if (is_string($category)) {
574                            // Can't have commas in categories.
575                            $category_csv .= str_replace(',', '', $category);
576                        } else {
577                            $category_csv .= $this->parse_hcard($category, true);
578                        }
579                    }
580                    $item['category'] = [['data' => $category_csv]];
581                }
582                if (isset($entry['properties']['published'][0])) {
583                    $timestamp = strtotime($entry['properties']['published'][0]);
584                    $pub_date = date('F j Y g:ia', $timestamp).' GMT';
585                    $item['pubDate'] = [['data' => $pub_date]];
586                }
587                // The title and description are set to the empty string to represent
588                // a deleted item (which also makes it an invalid rss item).
589                if (isset($entry['properties']['deleted'][0])) {
590                    $item['title'] = [['data' => '']];
591                    $item['description'] = [['data' => '']];
592                }
593                $items[] = ['child' => ['' => $item]];
594            }
595        }
596        // Mimic RSS data format when storing microformats.
597        $link = [['data' => $url]];
598        $image = '';
599        if (!is_string($feed_author) &&
600                isset($feed_author['properties']['photo'][0])) {
601            $image = [['child' => ['' => ['url' =>
602                [['data' => $feed_author['properties']['photo'][0]]]]]]];
603        }
604        // Use the name given for the h-feed, or get the title from the html.
605        if ($feed_title !== '') {
606            $feed_title = [['data' => htmlspecialchars($feed_title)]];
607        } elseif ($position = strpos($data, '<title>')) {
608            $start = $position < 200 ? 0 : $position - 200;
609            $check = substr($data, $start, 400);
610            $matches = [];
611            if (preg_match('/<title>(.+)<\/title>/', $check, $matches)) {
612                $feed_title = [['data' => htmlspecialchars($matches[1])]];
613            }
614        }
615        $channel = ['channel' => [['child' => ['' =>
616            ['link' => $link, 'image' => $image, 'title' => $feed_title,
617                  'item' => $items]]]]];
618        $rss = [['attribs' => ['' => ['version' => '2.0']],
619                           'child' => ['' => $channel]]];
620        $this->data = ['child' => ['' => ['rss' => $rss]]];
621        return true;
622    }
623
624    private function declare_html_entities()
625    {
626        // This is required because the RSS specification says that entity-encoded
627        // html is allowed, but the xml specification says they must be declared.
628        return '<!DOCTYPE html [ <!ENTITY nbsp "&#x00A0;"> <!ENTITY iexcl "&#x00A1;"> <!ENTITY cent "&#x00A2;"> <!ENTITY pound "&#x00A3;"> <!ENTITY curren "&#x00A4;"> <!ENTITY yen "&#x00A5;"> <!ENTITY brvbar "&#x00A6;"> <!ENTITY sect "&#x00A7;"> <!ENTITY uml "&#x00A8;"> <!ENTITY copy "&#x00A9;"> <!ENTITY ordf "&#x00AA;"> <!ENTITY laquo "&#x00AB;"> <!ENTITY not "&#x00AC;"> <!ENTITY shy "&#x00AD;"> <!ENTITY reg "&#x00AE;"> <!ENTITY macr "&#x00AF;"> <!ENTITY deg "&#x00B0;"> <!ENTITY plusmn "&#x00B1;"> <!ENTITY sup2 "&#x00B2;"> <!ENTITY sup3 "&#x00B3;"> <!ENTITY acute "&#x00B4;"> <!ENTITY micro "&#x00B5;"> <!ENTITY para "&#x00B6;"> <!ENTITY middot "&#x00B7;"> <!ENTITY cedil "&#x00B8;"> <!ENTITY sup1 "&#x00B9;"> <!ENTITY ordm "&#x00BA;"> <!ENTITY raquo "&#x00BB;"> <!ENTITY frac14 "&#x00BC;"> <!ENTITY frac12 "&#x00BD;"> <!ENTITY frac34 "&#x00BE;"> <!ENTITY iquest "&#x00BF;"> <!ENTITY Agrave "&#x00C0;"> <!ENTITY Aacute "&#x00C1;"> <!ENTITY Acirc "&#x00C2;"> <!ENTITY Atilde "&#x00C3;"> <!ENTITY Auml "&#x00C4;"> <!ENTITY Aring "&#x00C5;"> <!ENTITY AElig "&#x00C6;"> <!ENTITY Ccedil "&#x00C7;"> <!ENTITY Egrave "&#x00C8;"> <!ENTITY Eacute "&#x00C9;"> <!ENTITY Ecirc "&#x00CA;"> <!ENTITY Euml "&#x00CB;"> <!ENTITY Igrave "&#x00CC;"> <!ENTITY Iacute "&#x00CD;"> <!ENTITY Icirc "&#x00CE;"> <!ENTITY Iuml "&#x00CF;"> <!ENTITY ETH "&#x00D0;"> <!ENTITY Ntilde "&#x00D1;"> <!ENTITY Ograve "&#x00D2;"> <!ENTITY Oacute "&#x00D3;"> <!ENTITY Ocirc "&#x00D4;"> <!ENTITY Otilde "&#x00D5;"> <!ENTITY Ouml "&#x00D6;"> <!ENTITY times "&#x00D7;"> <!ENTITY Oslash "&#x00D8;"> <!ENTITY Ugrave "&#x00D9;"> <!ENTITY Uacute "&#x00DA;"> <!ENTITY Ucirc "&#x00DB;"> <!ENTITY Uuml "&#x00DC;"> <!ENTITY Yacute "&#x00DD;"> <!ENTITY THORN "&#x00DE;"> <!ENTITY szlig "&#x00DF;"> <!ENTITY agrave "&#x00E0;"> <!ENTITY aacute "&#x00E1;"> <!ENTITY acirc "&#x00E2;"> <!ENTITY atilde "&#x00E3;"> <!ENTITY auml "&#x00E4;"> <!ENTITY aring "&#x00E5;"> <!ENTITY aelig "&#x00E6;"> <!ENTITY ccedil "&#x00E7;"> <!ENTITY egrave "&#x00E8;"> <!ENTITY eacute "&#x00E9;"> <!ENTITY ecirc "&#x00EA;"> <!ENTITY euml "&#x00EB;"> <!ENTITY igrave "&#x00EC;"> <!ENTITY iacute "&#x00ED;"> <!ENTITY icirc "&#x00EE;"> <!ENTITY iuml "&#x00EF;"> <!ENTITY eth "&#x00F0;"> <!ENTITY ntilde "&#x00F1;"> <!ENTITY ograve "&#x00F2;"> <!ENTITY oacute "&#x00F3;"> <!ENTITY ocirc "&#x00F4;"> <!ENTITY otilde "&#x00F5;"> <!ENTITY ouml "&#x00F6;"> <!ENTITY divide "&#x00F7;"> <!ENTITY oslash "&#x00F8;"> <!ENTITY ugrave "&#x00F9;"> <!ENTITY uacute "&#x00FA;"> <!ENTITY ucirc "&#x00FB;"> <!ENTITY uuml "&#x00FC;"> <!ENTITY yacute "&#x00FD;"> <!ENTITY thorn "&#x00FE;"> <!ENTITY yuml "&#x00FF;"> <!ENTITY OElig "&#x0152;"> <!ENTITY oelig "&#x0153;"> <!ENTITY Scaron "&#x0160;"> <!ENTITY scaron "&#x0161;"> <!ENTITY Yuml "&#x0178;"> <!ENTITY fnof "&#x0192;"> <!ENTITY circ "&#x02C6;"> <!ENTITY tilde "&#x02DC;"> <!ENTITY Alpha "&#x0391;"> <!ENTITY Beta "&#x0392;"> <!ENTITY Gamma "&#x0393;"> <!ENTITY Epsilon "&#x0395;"> <!ENTITY Zeta "&#x0396;"> <!ENTITY Eta "&#x0397;"> <!ENTITY Theta "&#x0398;"> <!ENTITY Iota "&#x0399;"> <!ENTITY Kappa "&#x039A;"> <!ENTITY Lambda "&#x039B;"> <!ENTITY Mu "&#x039C;"> <!ENTITY Nu "&#x039D;"> <!ENTITY Xi "&#x039E;"> <!ENTITY Omicron "&#x039F;"> <!ENTITY Pi "&#x03A0;"> <!ENTITY Rho "&#x03A1;"> <!ENTITY Sigma "&#x03A3;"> <!ENTITY Tau "&#x03A4;"> <!ENTITY Upsilon "&#x03A5;"> <!ENTITY Phi "&#x03A6;"> <!ENTITY Chi "&#x03A7;"> <!ENTITY Psi "&#x03A8;"> <!ENTITY Omega "&#x03A9;"> <!ENTITY alpha "&#x03B1;"> <!ENTITY beta "&#x03B2;"> <!ENTITY gamma "&#x03B3;"> <!ENTITY delta "&#x03B4;"> <!ENTITY epsilon "&#x03B5;"> <!ENTITY zeta "&#x03B6;"> <!ENTITY eta "&#x03B7;"> <!ENTITY theta "&#x03B8;"> <!ENTITY iota "&#x03B9;"> <!ENTITY kappa "&#x03BA;"> <!ENTITY lambda "&#x03BB;"> <!ENTITY mu "&#x03BC;"> <!ENTITY nu "&#x03BD;"> <!ENTITY xi "&#x03BE;"> <!ENTITY omicron "&#x03BF;"> <!ENTITY pi "&#x03C0;"> <!ENTITY rho "&#x03C1;"> <!ENTITY sigmaf "&#x03C2;"> <!ENTITY sigma "&#x03C3;"> <!ENTITY tau "&#x03C4;"> <!ENTITY upsilon "&#x03C5;"> <!ENTITY phi "&#x03C6;"> <!ENTITY chi "&#x03C7;"> <!ENTITY psi "&#x03C8;"> <!ENTITY omega "&#x03C9;"> <!ENTITY thetasym "&#x03D1;"> <!ENTITY upsih "&#x03D2;"> <!ENTITY piv "&#x03D6;"> <!ENTITY ensp "&#x2002;"> <!ENTITY emsp "&#x2003;"> <!ENTITY thinsp "&#x2009;"> <!ENTITY zwnj "&#x200C;"> <!ENTITY zwj "&#x200D;"> <!ENTITY lrm "&#x200E;"> <!ENTITY rlm "&#x200F;"> <!ENTITY ndash "&#x2013;"> <!ENTITY mdash "&#x2014;"> <!ENTITY lsquo "&#x2018;"> <!ENTITY rsquo "&#x2019;"> <!ENTITY sbquo "&#x201A;"> <!ENTITY ldquo "&#x201C;"> <!ENTITY rdquo "&#x201D;"> <!ENTITY bdquo "&#x201E;"> <!ENTITY dagger "&#x2020;"> <!ENTITY Dagger "&#x2021;"> <!ENTITY bull "&#x2022;"> <!ENTITY hellip "&#x2026;"> <!ENTITY permil "&#x2030;"> <!ENTITY prime "&#x2032;"> <!ENTITY Prime "&#x2033;"> <!ENTITY lsaquo "&#x2039;"> <!ENTITY rsaquo "&#x203A;"> <!ENTITY oline "&#x203E;"> <!ENTITY frasl "&#x2044;"> <!ENTITY euro "&#x20AC;"> <!ENTITY image "&#x2111;"> <!ENTITY weierp "&#x2118;"> <!ENTITY real "&#x211C;"> <!ENTITY trade "&#x2122;"> <!ENTITY alefsym "&#x2135;"> <!ENTITY larr "&#x2190;"> <!ENTITY uarr "&#x2191;"> <!ENTITY rarr "&#x2192;"> <!ENTITY darr "&#x2193;"> <!ENTITY harr "&#x2194;"> <!ENTITY crarr "&#x21B5;"> <!ENTITY lArr "&#x21D0;"> <!ENTITY uArr "&#x21D1;"> <!ENTITY rArr "&#x21D2;"> <!ENTITY dArr "&#x21D3;"> <!ENTITY hArr "&#x21D4;"> <!ENTITY forall "&#x2200;"> <!ENTITY part "&#x2202;"> <!ENTITY exist "&#x2203;"> <!ENTITY empty "&#x2205;"> <!ENTITY nabla "&#x2207;"> <!ENTITY isin "&#x2208;"> <!ENTITY notin "&#x2209;"> <!ENTITY ni "&#x220B;"> <!ENTITY prod "&#x220F;"> <!ENTITY sum "&#x2211;"> <!ENTITY minus "&#x2212;"> <!ENTITY lowast "&#x2217;"> <!ENTITY radic "&#x221A;"> <!ENTITY prop "&#x221D;"> <!ENTITY infin "&#x221E;"> <!ENTITY ang "&#x2220;"> <!ENTITY and "&#x2227;"> <!ENTITY or "&#x2228;"> <!ENTITY cap "&#x2229;"> <!ENTITY cup "&#x222A;"> <!ENTITY int "&#x222B;"> <!ENTITY there4 "&#x2234;"> <!ENTITY sim "&#x223C;"> <!ENTITY cong "&#x2245;"> <!ENTITY asymp "&#x2248;"> <!ENTITY ne "&#x2260;"> <!ENTITY equiv "&#x2261;"> <!ENTITY le "&#x2264;"> <!ENTITY ge "&#x2265;"> <!ENTITY sub "&#x2282;"> <!ENTITY sup "&#x2283;"> <!ENTITY nsub "&#x2284;"> <!ENTITY sube "&#x2286;"> <!ENTITY supe "&#x2287;"> <!ENTITY oplus "&#x2295;"> <!ENTITY otimes "&#x2297;"> <!ENTITY perp "&#x22A5;"> <!ENTITY sdot "&#x22C5;"> <!ENTITY lceil "&#x2308;"> <!ENTITY rceil "&#x2309;"> <!ENTITY lfloor "&#x230A;"> <!ENTITY rfloor "&#x230B;"> <!ENTITY lang "&#x2329;"> <!ENTITY rang "&#x232A;"> <!ENTITY loz "&#x25CA;"> <!ENTITY spades "&#x2660;"> <!ENTITY clubs "&#x2663;"> <!ENTITY hearts "&#x2665;"> <!ENTITY diams "&#x2666;"> ]>';
629    }
630}
631
632class_alias('SimplePie\Parser', 'SimplePie_Parser');
633