1 <?php

     2 

     3 /**

     4  * SimplePie

     5  *

     6  * A PHP-Based RSS and Atom Feed Framework.

     7  * Takes the hard work out of managing a complete RSS/Atom solution.

     8  *

     9  * Copyright (c) 2004-2022, Ryan Parman, Sam Sneddon, Ryan McCue, and contributors

    10  * All rights reserved.

    11  *

    12  * Redistribution and use in source and binary forms, with or without modification, are

    13  * permitted provided that the following conditions are met:

    14  *

    15  * 	* Redistributions of source code must retain the above copyright notice, this list of

    16  * 	  conditions and the following disclaimer.

    17  *

    18  * 	* Redistributions in binary form must reproduce the above copyright notice, this list

    19  * 	  of conditions and the following disclaimer in the documentation and/or other materials

    20  * 	  provided with the distribution.

    21  *

    22  * 	* Neither the name of the SimplePie Team nor the names of its contributors may be used

    23  * 	  to endorse or promote products derived from this software without specific prior

    24  * 	  written permission.

    25  *

    26  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS

    27  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY

    28  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS

    29  * AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

    30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

    31  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

    32  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR

    33  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

    34  * POSSIBILITY OF SUCH DAMAGE.

    35  *

    36  * @package SimplePie

    37  * @copyright 2004-2016 Ryan Parman, Sam Sneddon, Ryan McCue

    38  * @author Ryan Parman

    39  * @author Sam Sneddon

    40  * @author Ryan McCue

    41  * @link http://simplepie.org/ SimplePie

    42  * @license http://www.opensource.org/licenses/bsd-license.php BSD License

    43  */

    44 

    45 namespace SimplePie;

    46 

    47 use SimplePie\XML\Declaration\Parser as DeclarationParser;

    48 

    49 /**

    50  * Parses XML into something sane

    51  *

    52  *

    53  * This class can be overloaded with {@see \SimplePie\SimplePie::set_parser_class()}

    54  *

    55  * @package SimplePie

    56  * @subpackage Parsing

    57  */

    58 class Parser implements RegistryAware

    59 {

    60     public $error_code;

    61     public $error_string;

    62     public $current_line;

    63     public $current_column;

    64     public $current_byte;

    65     public $separator = ' ';

    66     public $namespace = [''];

    67     public $element = [''];

    68     public $xml_base = [''];

    69     public $xml_base_explicit = [false];

    70     public $xml_lang = [''];

    71     public $data = [];

    72     public $datas = [[]];

    73     public $current_xhtml_construct = -1;

    74     public $encoding;

    75     protected $registry;

    76 

    77     public function set_registry(\SimplePie\Registry $registry)/* : void */

    78     {

    79         $this->registry = $registry;

    80     }

    81 

    82     public function parse(&$data, $encoding, $url = '')

    83     {

    84         if (class_exists('DOMXpath') && function_exists('Mf2\parse')) {

    85             $doc = new \DOMDocument();

    86             @$doc->loadHTML($data);

    87             $xpath = new \DOMXpath($doc);

    88             // Check for both h-feed and h-entry, as both a feed with no entries

    89             // and a list of entries without an h-feed wrapper are both valid.

    90             $query = '//*[contains(concat(" ", @class, " "), " h-feed ") or '.

    91                 'contains(concat(" ", @class, " "), " h-entry ")]';

    92             $result = $xpath->query($query);

    93             if ($result->length !== 0) {

    94                 return $this->parse_microformats($data, $url);

    95             }

    96         }

    97 

    98         // Use UTF-8 if we get passed US-ASCII, as every US-ASCII character is a UTF-8 character

    99         if (strtoupper($encoding) === 'US-ASCII') {

   100             $this->encoding = 'UTF-8';

   101         } else {

   102             $this->encoding = $encoding;

   103         }

   104 

   105         // Strip BOM:

   106         // UTF-32 Big Endian BOM

   107         if (substr($data, 0, 4) === "\x00\x00\xFE\xFF") {

   108             $data = substr($data, 4);

   109         }

   110         // UTF-32 Little Endian BOM

   111         elseif (substr($data, 0, 4) === "\xFF\xFE\x00\x00") {

   112             $data = substr($data, 4);

   113         }

   114         // UTF-16 Big Endian BOM

   115         elseif (substr($data, 0, 2) === "\xFE\xFF") {

   116             $data = substr($data, 2);

   117         }

   118         // UTF-16 Little Endian BOM

   119         elseif (substr($data, 0, 2) === "\xFF\xFE") {

   120             $data = substr($data, 2);

   121         }

   122         // UTF-8 BOM

   123         elseif (substr($data, 0, 3) === "\xEF\xBB\xBF") {

   124             $data = substr($data, 3);

   125         }

   126 

   127         if (substr($data, 0, 5) === '<?xml' && strspn(substr($data, 5, 1), "\x09\x0A\x0D\x20") && ($pos = strpos($data, '?>')) !== false) {

   128             $declaration = $this->registry->create(DeclarationParser::class, [substr($data, 5, $pos - 5)]);

   129             if ($declaration->parse()) {

   130                 $data = substr($data, $pos + 2);

   131                 $data = '<?xml version="' . $declaration->version . '" encoding="' . $encoding . '" standalone="' . (($declaration->standalone) ? 'yes' : 'no') . '"?>' ."\n". $this->declare_html_entities() . $data;

   132             } else {

   133                 $this->error_string = 'SimplePie bug! Please report this!';

   134                 return false;

   135             }

   136         }

   137 

   138         $return = true;

   139 

   140         static $xml_is_sane = null;

   141         if ($xml_is_sane === null) {

   142             $parser_check = xml_parser_create();

   143             xml_parse_into_struct($parser_check, '<foo>&amp;</foo>', $values);

   144             xml_parser_free($parser_check);

   145             $xml_is_sane = isset($values[0]['value']);

   146         }

   147 

   148         // Create the parser

   149         if ($xml_is_sane) {

   150             $xml = xml_parser_create_ns($this->encoding, $this->separator);

   151             xml_parser_set_option($xml, XML_OPTION_SKIP_WHITE, 1);

   152             xml_parser_set_option($xml, XML_OPTION_CASE_FOLDING, 0);

   153             xml_set_character_data_handler($xml, [$this, 'cdata']);

   154             xml_set_element_handler($xml, [$this, 'tag_open'], [$this, 'tag_close']);

   155 

   156             // Parse!

   157             $wrapper = @is_writable(sys_get_temp_dir()) ? 'php://temp' : 'php://memory';

   158             if (($stream = fopen($wrapper, 'r+')) &&

   159                 fwrite($stream, $data) &&

   160                 rewind($stream)) {

   161                 //Parse by chunks not to use too much memory

   162                 do {

   163                     $stream_data = fread($stream, 1048576);

   164                     if (!xml_parse($xml, $stream_data === false ? '' : $stream_data, feof($stream))) {

   165                         $this->error_code = xml_get_error_code($xml);

   166                         $this->error_string = xml_error_string($this->error_code);

   167                         $return = false;

   168                         break;

   169                     }

   170                 } while (!feof($stream));

   171                 fclose($stream);

   172             } else {

   173                 $return = false;

   174             }

   175 

   176             $this->current_line = xml_get_current_line_number($xml);

   177             $this->current_column = xml_get_current_column_number($xml);

   178             $this->current_byte = xml_get_current_byte_index($xml);

   179             xml_parser_free($xml);

   180             return $return;

   181         }

   182 

   183         libxml_clear_errors();

   184         $xml = new \XMLReader();

   185         $xml->xml($data);

   186         while (@$xml->read()) {

   187             switch ($xml->nodeType) {

   188                 case constant('XMLReader::END_ELEMENT'):

   189                     if ($xml->namespaceURI !== '') {

   190                         $tagName = $xml->namespaceURI . $this->separator . $xml->localName;

   191                     } else {

   192                         $tagName = $xml->localName;

   193                     }

   194                     $this->tag_close(null, $tagName);

   195                     break;

   196                 case constant('XMLReader::ELEMENT'):

   197                     $empty = $xml->isEmptyElement;

   198                     if ($xml->namespaceURI !== '') {

   199                         $tagName = $xml->namespaceURI . $this->separator . $xml->localName;

   200                     } else {

   201                         $tagName = $xml->localName;

   202                     }

   203                     $attributes = [];

   204                     while ($xml->moveToNextAttribute()) {

   205                         if ($xml->namespaceURI !== '') {

   206                             $attrName = $xml->namespaceURI . $this->separator . $xml->localName;

   207                         } else {

   208                             $attrName = $xml->localName;

   209                         }

   210                         $attributes[$attrName] = $xml->value;

   211                     }

   212                     $this->tag_open(null, $tagName, $attributes);

   213                     if ($empty) {

   214                         $this->tag_close(null, $tagName);

   215                     }

   216                     break;

   217                 case constant('XMLReader::TEXT'):

   218 

   219                 case constant('XMLReader::CDATA'):

   220                     $this->cdata(null, $xml->value);

   221                     break;

   222             }

   223         }

   224         if ($error = libxml_get_last_error()) {

   225             $this->error_code = $error->code;

   226             $this->error_string = $error->message;

   227             $this->current_line = $error->line;

   228             $this->current_column = $error->column;

   229             return false;

   230         }

   231 

   232         return true;

   233     }

   234 

   235     public function get_error_code()

   236     {

   237         return $this->error_code;

   238     }

   239 

   240     public function get_error_string()

   241     {

   242         return $this->error_string;

   243     }

   244 

   245     public function get_current_line()

   246     {

   247         return $this->current_line;

   248     }

   249 

   250     public function get_current_column()

   251     {

   252         return $this->current_column;

   253     }

   254 

   255     public function get_current_byte()

   256     {

   257         return $this->current_byte;

   258     }

   259 

   260     public function get_data()

   261     {

   262         return $this->data;

   263     }

   264 

   265     public function tag_open($parser, $tag, $attributes)

   266     {

   267         [$this->namespace[], $this->element[]] = $this->split_ns($tag);

   268 

   269         $attribs = [];

   270         foreach ($attributes as $name => $value) {

   271             [$attrib_namespace, $attribute] = $this->split_ns($name);

   272             $attribs[$attrib_namespace][$attribute] = $value;

   273         }

   274 

   275         if (isset($attribs[\SimplePie\SimplePie::NAMESPACE_XML]['base'])) {

   276             $base = $this->registry->call(Misc::class, 'absolutize_url', [$attribs[\SimplePie\SimplePie::NAMESPACE_XML]['base'], end($this->xml_base)]);

   277             if ($base !== false) {

   278                 $this->xml_base[] = $base;

   279                 $this->xml_base_explicit[] = true;

   280             }

   281         } else {

   282             $this->xml_base[] = end($this->xml_base);

   283             $this->xml_base_explicit[] = end($this->xml_base_explicit);

   284         }

   285 

   286         if (isset($attribs[\SimplePie\SimplePie::NAMESPACE_XML]['lang'])) {

   287             $this->xml_lang[] = $attribs[\SimplePie\SimplePie::NAMESPACE_XML]['lang'];

   288         } else {

   289             $this->xml_lang[] = end($this->xml_lang);

   290         }

   291 

   292         if ($this->current_xhtml_construct >= 0) {

   293             $this->current_xhtml_construct++;

   294             if (end($this->namespace) === \SimplePie\SimplePie::NAMESPACE_XHTML) {

   295                 $this->data['data'] .= '<' . end($this->element);

   296                 if (isset($attribs[''])) {

   297                     foreach ($attribs[''] as $name => $value) {

   298                         $this->data['data'] .= ' ' . $name . '="' . htmlspecialchars($value, ENT_COMPAT, $this->encoding) . '"';

   299                     }

   300                 }

   301                 $this->data['data'] .= '>';

   302             }

   303         } else {

   304             $this->datas[] = &$this->data;

   305             $this->data = &$this->data['child'][end($this->namespace)][end($this->element)][];

   306             $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)];

   307             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')

   308             || (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')

   309             || (end($this->namespace) === \SimplePie\SimplePie::NAMESPACE_RSS_20 && in_array(end($this->element), ['title']))

   310             || (end($this->namespace) === \SimplePie\SimplePie::NAMESPACE_RSS_090 && in_array(end($this->element), ['title']))

   311             || (end($this->namespace) === \SimplePie\SimplePie::NAMESPACE_RSS_10 && in_array(end($this->element), ['title']))) {

   312                 $this->current_xhtml_construct = 0;

   313             }

   314         }

   315     }

   316 

   317     public function cdata($parser, $cdata)

   318     {

   319         if ($this->current_xhtml_construct >= 0) {

   320             $this->data['data'] .= htmlspecialchars($cdata, ENT_QUOTES, $this->encoding);

   321         } else {

   322             $this->data['data'] .= $cdata;

   323         }

   324     }

   325 

   326     public function tag_close($parser, $tag)

   327     {

   328         if ($this->current_xhtml_construct >= 0) {

   329             $this->current_xhtml_construct--;

   330             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'])) {

   331                 $this->data['data'] .= '</' . end($this->element) . '>';

   332             }

   333         }

   334         if ($this->current_xhtml_construct === -1) {

   335             $this->data = &$this->datas[count($this->datas) - 1];

   336             array_pop($this->datas);

   337         }

   338 

   339         array_pop($this->element);

   340         array_pop($this->namespace);

   341         array_pop($this->xml_base);

   342         array_pop($this->xml_base_explicit);

   343         array_pop($this->xml_lang);

   344     }

   345 

   346     public function split_ns($string)

   347     {

   348         static $cache = [];

   349         if (!isset($cache[$string])) {

   350             if ($pos = strpos($string, $this->separator)) {

   351                 static $separator_length;

   352                 if (!$separator_length) {

   353                     $separator_length = strlen($this->separator);

   354                 }

   355                 $namespace = substr($string, 0, $pos);

   356                 $local_name = substr($string, $pos + $separator_length);

   357                 if (strtolower($namespace) === \SimplePie\SimplePie::NAMESPACE_ITUNES) {

   358                     $namespace = \SimplePie\SimplePie::NAMESPACE_ITUNES;

   359                 }

   360 

   361                 // Normalize the Media RSS namespaces

   362                 if ($namespace === \SimplePie\SimplePie::NAMESPACE_MEDIARSS_WRONG ||

   363                     $namespace === \SimplePie\SimplePie::NAMESPACE_MEDIARSS_WRONG2 ||

   364                     $namespace === \SimplePie\SimplePie::NAMESPACE_MEDIARSS_WRONG3 ||

   365                     $namespace === \SimplePie\SimplePie::NAMESPACE_MEDIARSS_WRONG4 ||

   366                     $namespace === \SimplePie\SimplePie::NAMESPACE_MEDIARSS_WRONG5) {

   367                     $namespace = \SimplePie\SimplePie::NAMESPACE_MEDIARSS;

   368                 }

   369                 $cache[$string] = [$namespace, $local_name];

   370             } else {

   371                 $cache[$string] = ['', $string];

   372             }

   373         }

   374         return $cache[$string];

   375     }

   376 

   377     private function parse_hcard($data, $category = false)

   378     {

   379         $name = '';

   380         $link = '';

   381         // Check if h-card is set and pass that information on in the link.

   382         if (isset($data['type']) && in_array('h-card', $data['type'])) {

   383             if (isset($data['properties']['name'][0])) {

   384                 $name = $data['properties']['name'][0];

   385             }

   386             if (isset($data['properties']['url'][0])) {

   387                 $link = $data['properties']['url'][0];

   388                 if ($name === '') {

   389                     $name = $link;

   390                 } else {

   391                     // can't have commas in categories.

   392                     $name = str_replace(',', '', $name);

   393                 }

   394                 $person_tag = $category ? '<span class="person-tag"></span>' : '';

   395                 return '<a class="h-card" href="'.$link.'">'.$person_tag.$name.'</a>';

   396             }

   397         }

   398         return $data['value'] ?? '';

   399     }

   400 

   401     private function parse_microformats(&$data, $url)

   402     {

   403         $feed_title = '';

   404         $feed_author = null;

   405         $author_cache = [];

   406         $items = [];

   407         $entries = [];

   408         $mf = \Mf2\parse($data, $url);

   409         // First look for an h-feed.

   410         $h_feed = [];

   411         foreach ($mf['items'] as $mf_item) {

   412             if (in_array('h-feed', $mf_item['type'])) {

   413                 $h_feed = $mf_item;

   414                 break;

   415             }

   416             // Also look for h-feed or h-entry in the children of each top level item.

   417             if (!isset($mf_item['children'][0]['type'])) {

   418                 continue;

   419             }

   420             if (in_array('h-feed', $mf_item['children'][0]['type'])) {

   421                 $h_feed = $mf_item['children'][0];

   422                 // In this case the parent of the h-feed may be an h-card, so use it as

   423                 // the feed_author.

   424                 if (in_array('h-card', $mf_item['type'])) {

   425                     $feed_author = $mf_item;

   426                 }

   427                 break;

   428             } elseif (in_array('h-entry', $mf_item['children'][0]['type'])) {

   429                 $entries = $mf_item['children'];

   430                 // In this case the parent of the h-entry list may be an h-card, so use

   431                 // it as the feed_author.

   432                 if (in_array('h-card', $mf_item['type'])) {

   433                     $feed_author = $mf_item;

   434                 }

   435                 break;

   436             }

   437         }

   438         if (isset($h_feed['children'])) {

   439             $entries = $h_feed['children'];

   440             // Also set the feed title and store author from the h-feed if available.

   441             if (isset($mf['items'][0]['properties']['name'][0])) {

   442                 $feed_title = $mf['items'][0]['properties']['name'][0];

   443             }

   444             if (isset($mf['items'][0]['properties']['author'][0])) {

   445                 $feed_author = $mf['items'][0]['properties']['author'][0];

   446             }

   447         } elseif (count($entries) === 0) {

   448             $entries = $mf['items'];

   449         }

   450         for ($i = 0; $i < count($entries); $i++) {

   451             $entry = $entries[$i];

   452             if (in_array('h-entry', $entry['type'])) {

   453                 $item = [];

   454                 $title = '';

   455                 $description = '';

   456                 if (isset($entry['properties']['url'][0])) {

   457                     $link = $entry['properties']['url'][0];

   458                     if (isset($link['value'])) {

   459                         $link = $link['value'];

   460                     }

   461                     $item['link'] = [['data' => $link]];

   462                 }

   463                 if (isset($entry['properties']['uid'][0])) {

   464                     $guid = $entry['properties']['uid'][0];

   465                     if (isset($guid['value'])) {

   466                         $guid = $guid['value'];

   467                     }

   468                     $item['guid'] = [['data' => $guid]];

   469                 }

   470                 if (isset($entry['properties']['name'][0])) {

   471                     $title = $entry['properties']['name'][0];

   472                     if (isset($title['value'])) {

   473                         $title = $title['value'];

   474                     }

   475                     $item['title'] = [['data' => $title]];

   476                 }

   477                 if (isset($entry['properties']['author'][0]) || isset($feed_author)) {

   478                     // author is a special case, it can be plain text or an h-card array.

   479                     // If it's plain text it can also be a url that should be followed to

   480                     // get the actual h-card.

   481                     $author = $entry['properties']['author'][0] ?? $feed_author;

   482                     if (!is_string($author)) {

   483                         $author = $this->parse_hcard($author);

   484                     } elseif (strpos($author, 'http') === 0) {

   485                         if (isset($author_cache[$author])) {

   486                             $author = $author_cache[$author];

   487                         } else {

   488                             $mf = \Mf2\fetch($author);

   489                             foreach ($mf['items'] as $hcard) {

   490                                 // Only interested in an h-card by itself in this case.

   491                                 if (!in_array('h-card', $hcard['type'])) {

   492                                     continue;

   493                                 }

   494                                 // It must have a url property matching what we fetched.

   495                                 if (!isset($hcard['properties']['url']) ||

   496                                         !(in_array($author, $hcard['properties']['url']))) {

   497                                     continue;

   498                                 }

   499                                 // Save parse_hcard the trouble of finding the correct url.

   500                                 $hcard['properties']['url'][0] = $author;

   501                                 // Cache this h-card for the next h-entry to check.

   502                                 $author_cache[$author] = $this->parse_hcard($hcard);

   503                                 $author = $author_cache[$author];

   504                                 break;

   505                             }

   506                         }

   507                     }

   508                     $item['author'] = [['data' => $author]];

   509                 }

   510                 if (isset($entry['properties']['photo'][0])) {

   511                     // If a photo is also in content, don't need to add it again here.

   512                     $content = '';

   513                     if (isset($entry['properties']['content'][0]['html'])) {

   514                         $content = $entry['properties']['content'][0]['html'];

   515                     }

   516                     $photo_list = [];

   517                     for ($j = 0; $j < count($entry['properties']['photo']); $j++) {

   518                         $photo = $entry['properties']['photo'][$j];

   519                         if (!empty($photo) && strpos($content, $photo) === false) {

   520                             $photo_list[] = $photo;

   521                         }

   522                     }

   523                     // When there's more than one photo show the first and use a lightbox.

   524                     // Need a permanent, unique name for the image set, but don't have

   525                     // anything unique except for the content itself, so use that.

   526                     $count = count($photo_list);

   527                     if ($count > 1) {

   528                         $image_set_id = preg_replace('/[[:^alnum:]]/', '', $photo_list[0]);

   529                         $description = '<p>';

   530                         for ($j = 0; $j < $count; $j++) {

   531                             $hidden = $j === 0 ? '' : 'class="hidden" ';

   532                             $description .= '<a href="'.$photo_list[$j].'" '.$hidden.

   533                                 'data-lightbox="image-set-'.$image_set_id.'">'.

   534                                 '<img src="'.$photo_list[$j].'"></a>';

   535                         }

   536                         $description .= '<br><b>'.$count.' photos</b></p>';

   537                     } elseif ($count == 1) {

   538                         $description = '<p><img src="'.$photo_list[0].'"></p>';

   539                     }

   540                 }

   541                 if (isset($entry['properties']['content'][0]['html'])) {

   542                     // e-content['value'] is the same as p-name when they are on the same

   543                     // element. Use this to replace title with a strip_tags version so

   544                     // that alt text from images is not included in the title.

   545                     if ($entry['properties']['content'][0]['value'] === $title) {

   546                         $title = strip_tags($entry['properties']['content'][0]['html']);

   547                         $item['title'] = [['data' => $title]];

   548                     }

   549                     $description .= $entry['properties']['content'][0]['html'];

   550                     if (isset($entry['properties']['in-reply-to'][0])) {

   551                         $in_reply_to = '';

   552                         if (is_string($entry['properties']['in-reply-to'][0])) {

   553                             $in_reply_to = $entry['properties']['in-reply-to'][0];

   554                         } elseif (isset($entry['properties']['in-reply-to'][0]['value'])) {

   555                             $in_reply_to = $entry['properties']['in-reply-to'][0]['value'];

   556                         }

   557                         if ($in_reply_to !== '') {

   558                             $description .= '<p><span class="in-reply-to"></span> '.

   559                                 '<a href="'.$in_reply_to.'">'.$in_reply_to.'</a><p>';

   560                         }

   561                     }

   562                     $item['description'] = [['data' => $description]];

   563                 }

   564                 if (isset($entry['properties']['category'])) {

   565                     $category_csv = '';

   566                     // Categories can also contain h-cards.

   567                     foreach ($entry['properties']['category'] as $category) {

   568                         if ($category_csv !== '') {

   569                             $category_csv .= ', ';

   570                         }

   571                         if (is_string($category)) {

   572                             // Can't have commas in categories.

   573                             $category_csv .= str_replace(',', '', $category);

   574                         } else {

   575                             $category_csv .= $this->parse_hcard($category, true);

   576                         }

   577                     }

   578                     $item['category'] = [['data' => $category_csv]];

   579                 }

   580                 if (isset($entry['properties']['published'][0])) {

   581                     $timestamp = strtotime($entry['properties']['published'][0]);

   582                     $pub_date = date('F j Y g:ia', $timestamp).' GMT';

   583                     $item['pubDate'] = [['data' => $pub_date]];

   584                 }

   585                 // The title and description are set to the empty string to represent

   586                 // a deleted item (which also makes it an invalid rss item).

   587                 if (isset($entry['properties']['deleted'][0])) {

   588                     $item['title'] = [['data' => '']];

   589                     $item['description'] = [['data' => '']];

   590                 }

   591                 $items[] = ['child' => ['' => $item]];

   592             }

   593         }

   594         // Mimic RSS data format when storing microformats.

   595         $link = [['data' => $url]];

   596         $image = '';

   597         if (!is_string($feed_author) &&

   598                 isset($feed_author['properties']['photo'][0])) {

   599             $image = [['child' => ['' => ['url' =>

   600                 [['data' => $feed_author['properties']['photo'][0]]]]]]];

   601         }

   602         // Use the name given for the h-feed, or get the title from the html.

   603         if ($feed_title !== '') {

   604             $feed_title = [['data' => htmlspecialchars($feed_title)]];

   605         } elseif ($position = strpos($data, '<title>')) {

   606             $start = $position < 200 ? 0 : $position - 200;

   607             $check = substr($data, $start, 400);

   608             $matches = [];

   609             if (preg_match('/<title>(.+)<\/title>/', $check, $matches)) {

   610                 $feed_title = [['data' => htmlspecialchars($matches[1])]];

   611             }

   612         }

   613         $channel = ['channel' => [['child' => ['' =>

   614             ['link' => $link, 'image' => $image, 'title' => $feed_title,

   615                   'item' => $items]]]]];

   616         $rss = [['attribs' => ['' => ['version' => '2.0']],

   617                            'child' => ['' => $channel]]];

   618         $this->data = ['child' => ['' => ['rss' => $rss]]];

   619         return true;

   620     }

   621 

   622     private function declare_html_entities()

   623     {

   624         // This is required because the RSS specification says that entity-encoded

   625         // html is allowed, but the xml specification says they must be declared.

   626         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;"> ]>';

   627     }

   628 }

   629 

   630 class_alias('SimplePie\Parser', 'SimplePie_Parser');