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<?php
/**
 * SimplePie
 *
 * A PHP-Based RSS and Atom Feed Framework.
 * Takes the hard work out of managing a complete RSS/Atom solution.
 *
 * Copyright (c) 2004-2016, Ryan Parman, Sam Sneddon, Ryan McCue, and contributors
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:
 *
 * 	* Redistributions of source code must retain the above copyright notice, this list of
 * 	 conditions and the following disclaimer.
 *
 * 	* Redistributions in binary form must reproduce the above copyright notice, this list
 * 	 of conditions and the following disclaimer in the documentation and/or other materials
 * 	 provided with the distribution.
 *
 * 	* Neither the name of the SimplePie Team nor the names of its contributors may be used
 * 	 to endorse or promote products derived from this software without specific prior
 * 	 written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS
 * AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * @package SimplePie
 * @copyright 2004-2016 Ryan Parman, Sam Sneddon, Ryan McCue
 * @author Ryan Parman
 * @author Sam Sneddon
 * @author Ryan McCue
 * @link http://simplepie.org/ SimplePie
 * @license http://www.opensource.org/licenses/bsd-license.php BSD License
 */

/**
 * Parses XML into something sane
 *
 *
 * This class can be overloaded with {@see SimplePie::set_parser_class()}
 *
 * @package SimplePie
 * @subpackage Parsing
 */
class SimplePie_Parser
{
	var $error_code;
	var $error_string;
	var $current_line;
	var $current_column;
	var $current_byte;
	var $separator = ' ';
	var $namespace = array('');
	var $element = array('');
	var $xml_base = array('');
	var $xml_base_explicit = array(false);
	var $xml_lang = array('');
	var $data = array();
	var $datas = array(array());
	var $current_xhtml_construct = -1;
	var $encoding;
	protected $registry;

public function set_registry(SimplePie_Registry $registry)
	{
		$this->registry = $registry;
	}

public function parse(&$data, $encoding, $url = '')
	{
		if (class_exists('DOMXpath') && function_exists('Mf2\parse')) {
			$doc = new DOMDocument();
			@$doc->loadHTML($data);
			$xpath = new DOMXpath($doc);
			// Check for both h-feed and h-entry, as both a feed with no entries
			// and a list of entries without an h-feed wrapper are both valid.
			$query = '//*[contains(concat(" ", @class, " "), " h-feed ") or '.
				'contains(concat(" ", @class, " "), " h-entry ")]';
			$result = $xpath->query($query);
			if ($result->length !== 0) {
				return $this->parse_microformats($data, $url);
			}
		}

// Use UTF-8 if we get passed US-ASCII, as every US-ASCII character is a UTF-8 character
		if (strtoupper($encoding) === 'US-ASCII')
		{
			$this->encoding = 'UTF-8';
		}
		else
		{
			$this->encoding = $encoding;
		}

// Strip BOM:
		// UTF-32 Big Endian BOM
		if (substr($data, 0, 4) === "\x00\x00\xFE\xFF")
		{
			$data = substr($data, 4);
		}
		// UTF-32 Little Endian BOM
		elseif (substr($data, 0, 4) === "\xFF\xFE\x00\x00")
		{
			$data = substr($data, 4);
		}
		// UTF-16 Big Endian BOM
		elseif (substr($data, 0, 2) === "\xFE\xFF")
		{
			$data = substr($data, 2);
		}
		// UTF-16 Little Endian BOM
		elseif (substr($data, 0, 2) === "\xFF\xFE")
		{
			$data = substr($data, 2);
		}
		// UTF-8 BOM
		elseif (substr($data, 0, 3) === "\xEF\xBB\xBF")
		{
			$data = substr($data, 3);
		}

if (substr($data, 0, 5) === '<?xml' && strspn(substr($data, 5, 1), "\x09\x0A\x0D\x20") && ($pos = strpos($data, '?>')) !== false)
		{
			$declaration = $this->registry->create('XML_Declaration_Parser', array(substr($data, 5, $pos - 5)));
			if ($declaration->parse())
			{
				$data = substr($data, $pos + 2);
				$data = '<?xml version="' . $declaration->version . '" encoding="' . $encoding . '" standalone="' . (($declaration->standalone) ? 'yes' : 'no') . '"?>' ."\n". $this->declare_html_entities() . $data;
			}
			else
			{
				$this->error_string = 'SimplePie bug! Please report this!';
				return false;
			}
		}

$return = true;

static $xml_is_sane = null;
		if ($xml_is_sane === null)
		{
			$parser_check = xml_parser_create();
			xml_parse_into_struct($parser_check, '<foo>&amp;</foo>', $values);
			xml_parser_free($parser_check);
			$xml_is_sane = isset($values[0]['value']);
		}

// Create the parser
		if ($xml_is_sane)
		{
			$xml = xml_parser_create_ns($this->encoding, $this->separator);
			xml_parser_set_option($xml, XML_OPTION_SKIP_WHITE, 1);
			xml_parser_set_option($xml, XML_OPTION_CASE_FOLDING, 0);
			xml_set_object($xml, $this);
			xml_set_character_data_handler($xml, 'cdata');
			xml_set_element_handler($xml, 'tag_open', 'tag_close');

// Parse!
			$wrapper = @is_writable(sys_get_temp_dir()) ? 'php://temp' : 'php://memory';
			if (($stream = fopen($wrapper, 'r+')) &&
				fwrite($stream, $data) &&
				rewind($stream))
			{
				//Parse by chunks not to use too much memory
				do
				{
					$stream_data = fread($stream, 1048576);
					if (!xml_parse($xml, $stream_data === false ? '' : $stream_data, feof($stream)))
					{
						$this->error_code = xml_get_error_code($xml);
						$this->error_string = xml_error_string($this->error_code);
						$return = false;
						break;
					}
				} while (!feof($stream));
				fclose($stream);
			}
			else
			{
				$return = false;
			}

$this->current_line = xml_get_current_line_number($xml);
			$this->current_column = xml_get_current_column_number($xml);
			$this->current_byte = xml_get_current_byte_index($xml);
			xml_parser_free($xml);
			return $return;
		}

libxml_clear_errors();
		$xml = new XMLReader();
		$xml->xml($data);
		while (@$xml->read())
		{
			switch ($xml->nodeType)
			{

case constant('XMLReader::END_ELEMENT'):
					if ($xml->namespaceURI !== '')
					{
						$tagName = $xml->namespaceURI . $this->separator . $xml->localName;
					}
					else
					{
						$tagName = $xml->localName;
					}
					$this->tag_close(null, $tagName);
					break;
				case constant('XMLReader::ELEMENT'):
					$empty = $xml->isEmptyElement;
					if ($xml->namespaceURI !== '')
					{
						$tagName = $xml->namespaceURI . $this->separator . $xml->localName;
					}
					else
					{
						$tagName = $xml->localName;
					}
					$attributes = array();
					while ($xml->moveToNextAttribute())
					{
						if ($xml->namespaceURI !== '')
						{
							$attrName = $xml->namespaceURI . $this->separator . $xml->localName;
						}
						else
						{
							$attrName = $xml->localName;
						}
						$attributes[$attrName] = $xml->value;
					}
					$this->tag_open(null, $tagName, $attributes);
					if ($empty)
					{
						$this->tag_close(null, $tagName);
					}
					break;
				case constant('XMLReader::TEXT'):

case constant('XMLReader::CDATA'):
					$this->cdata(null, $xml->value);
					break;
			}
		}
		if ($error = libxml_get_last_error())
		{
			$this->error_code = $error->code;
			$this->error_string = $error->message;
			$this->current_line = $error->line;
			$this->current_column = $error->column;
			return false;
		}

return true;
	}

public function get_error_code()
	{
		return $this->error_code;
	}

public function get_error_string()
	{
		return $this->error_string;
	}

public function get_current_line()
	{
		return $this->current_line;
	}

public function get_current_column()
	{
		return $this->current_column;
	}

public function get_current_byte()
	{
		return $this->current_byte;
	}

public function get_data()
	{
		return $this->data;
	}

public function tag_open($parser, $tag, $attributes)
	{
		list($this->namespace[], $this->element[]) = $this->split_ns($tag);

$attribs = array();
		foreach ($attributes as $name => $value)
		{
			list($attrib_namespace, $attribute) = $this->split_ns($name);
			$attribs[$attrib_namespace][$attribute] = $value;
		}

if (isset($attribs[SIMPLEPIE_NAMESPACE_XML]['base']))
		{
			$base = $this->registry->call('Misc', 'absolutize_url', array($attribs[SIMPLEPIE_NAMESPACE_XML]['base'], end($this->xml_base)));
			if ($base !== false)
			{
				$this->xml_base[] = $base;
				$this->xml_base_explicit[] = true;
			}
		}
		else
		{
			$this->xml_base[] = end($this->xml_base);
			$this->xml_base_explicit[] = end($this->xml_base_explicit);
		}

if (isset($attribs[SIMPLEPIE_NAMESPACE_XML]['lang']))
		{
			$this->xml_lang[] = $attribs[SIMPLEPIE_NAMESPACE_XML]['lang'];
		}
		else
		{
			$this->xml_lang[] = end($this->xml_lang);
		}

if ($this->current_xhtml_construct >= 0)
		{
			$this->current_xhtml_construct++;
			if (end($this->namespace) === SIMPLEPIE_NAMESPACE_XHTML)
			{
				$this->data['data'] .= '<' . end($this->element);
				if (isset($attribs['']))
				{
					foreach ($attribs[''] as $name => $value)
					{
						$this->data['data'] .= ' ' . $name . '="' . htmlspecialchars($value, ENT_COMPAT, $this->encoding) . '"';
					}
				}
				$this->data['data'] .= '>';
			}
		}
		else
		{
			$this->datas[] =& $this->data;
			$this->data =& $this->data['child'][end($this->namespace)][end($this->element)][];
			$this->data = array('data' => '', 'attribs' => $attribs, 'xml_base' => end($this->xml_base), 'xml_base_explicit' => end($this->xml_base_explicit), 'xml_lang' => end($this->xml_lang));
			if ((end($this->namespace) === SIMPLEPIE_NAMESPACE_ATOM_03 && in_array(end($this->element), array('title', 'tagline', 'copyright', 'info', 'summary', 'content')) && isset($attribs['']['mode']) && $attribs['']['mode'] === 'xml')
			|| (end($this->namespace) === SIMPLEPIE_NAMESPACE_ATOM_10 && in_array(end($this->element), array('rights', 'subtitle', 'summary', 'info', 'title', 'content')) && isset($attribs['']['type']) && $attribs['']['type'] === 'xhtml')
			|| (end($this->namespace) === SIMPLEPIE_NAMESPACE_RSS_20 && in_array(end($this->element), array('title')))
			|| (end($this->namespace) === SIMPLEPIE_NAMESPACE_RSS_090 && in_array(end($this->element), array('title')))
			|| (end($this->namespace) === SIMPLEPIE_NAMESPACE_RSS_10 && in_array(end($this->element), array('title'))))
			{
				$this->current_xhtml_construct = 0;
			}
		}
	}

public function cdata($parser, $cdata)
	{
		if ($this->current_xhtml_construct >= 0)
		{
			$this->data['data'] .= htmlspecialchars($cdata, ENT_QUOTES, $this->encoding);
		}
		else
		{
			$this->data['data'] .= $cdata;
		}
	}

public function tag_close($parser, $tag)
	{
		if ($this->current_xhtml_construct >= 0)
		{
			$this->current_xhtml_construct--;
			if (end($this->namespace) === SIMPLEPIE_NAMESPACE_XHTML && !in_array(end($this->element), array('area', 'base', 'basefont', 'br', 'col', 'frame', 'hr', 'img', 'input', 'isindex', 'link', 'meta', 'param')))
			{
				$this->data['data'] .= '</' . end($this->element) . '>';
			}
		}
		if ($this->current_xhtml_construct === -1)
		{
			$this->data =& $this->datas[count($this->datas) - 1];
			array_pop($this->datas);
		}

array_pop($this->element);
		array_pop($this->namespace);
		array_pop($this->xml_base);
		array_pop($this->xml_base_explicit);
		array_pop($this->xml_lang);
	}

public function split_ns($string)
	{
		static $cache = array();
		if (!isset($cache[$string]))
		{
			if ($pos = strpos($string, $this->separator))
			{
				static $separator_length;
				if (!$separator_length)
				{
					$separator_length = strlen($this->separator);
				}
				$namespace = substr($string, 0, $pos);
				$local_name = substr($string, $pos + $separator_length);
				if (strtolower($namespace) === SIMPLEPIE_NAMESPACE_ITUNES)
				{
					$namespace = SIMPLEPIE_NAMESPACE_ITUNES;
				}

// Normalize the Media RSS namespaces
				if ($namespace === SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG ||
					$namespace === SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG2 ||
					$namespace === SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG3 ||
					$namespace === SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG4 ||
					$namespace === SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG5 )
				{
					$namespace = SIMPLEPIE_NAMESPACE_MEDIARSS;
				}
				$cache[$string] = array($namespace, $local_name);
			}
			else
			{
				$cache[$string] = array('', $string);
			}
		}
		return $cache[$string];
	}

private function parse_hcard($data, $category = false) {
		$name = '';
		$link = '';
		// Check if h-card is set and pass that information on in the link.
		if (isset($data['type']) && in_array('h-card', $data['type'])) {
			if (isset($data['properties']['name'][0])) {
				$name = $data['properties']['name'][0];
			}
			if (isset($data['properties']['url'][0])) {
				$link = $data['properties']['url'][0];
				if ($name === '') {
					$name = $link;
				}
				else {
					// can't have commas in categories.
					$name = str_replace(',', '', $name);
				}
				$person_tag = $category ? '' : '';
				return '<a class="h-card" href="'.$link.'">'.$person_tag.$name.'</a>';
			}
		}
		return isset($data['value']) ? $data['value'] : '';
	}

private function parse_microformats(&$data, $url) {
		$feed_title = '';
		$feed_author = NULL;
		$author_cache = array();
		$items = array();
		$entries = array();
		$mf = Mf2\parse($data, $url);
		// First look for an h-feed.
		$h_feed = array();
		foreach ($mf['items'] as $mf_item) {
			if (in_array('h-feed', $mf_item['type'])) {
				$h_feed = $mf_item;
				break;
			}
			// Also look for h-feed or h-entry in the children of each top level item.
			if (!isset($mf_item['children'][0]['type'])) continue;
			if (in_array('h-feed', $mf_item['children'][0]['type'])) {
				$h_feed = $mf_item['children'][0];
				// In this case the parent of the h-feed may be an h-card, so use it as
				// the feed_author.
				if (in_array('h-card', $mf_item['type'])) $feed_author = $mf_item;
				break;
			}
			else if (in_array('h-entry', $mf_item['children'][0]['type'])) {
				$entries = $mf_item['children'];
				// In this case the parent of the h-entry list may be an h-card, so use
				// it as the feed_author.
				if (in_array('h-card', $mf_item['type'])) $feed_author = $mf_item;
				break;
			}
		}
		if (isset($h_feed['children'])) {
			$entries = $h_feed['children'];
			// Also set the feed title and store author from the h-feed if available.
			if (isset($mf['items'][0]['properties']['name'][0])) {
				$feed_title = $mf['items'][0]['properties']['name'][0];
			}
			if (isset($mf['items'][0]['properties']['author'][0])) {
				$feed_author = $mf['items'][0]['properties']['author'][0];
			}
		}
		else if (count($entries) === 0) {
			$entries = $mf['items'];
		}
		for ($i = 0; $i < count($entries); $i++) {
			$entry = $entries[$i];
			if (in_array('h-entry', $entry['type'])) {
				$item = array();
				$title = '';
				$description = '';
				if (isset($entry['properties']['url'][0])) {
					$link = $entry['properties']['url'][0];
					if (isset($link['value'])) $link = $link['value'];
					$item['link'] = array(array('data' => $link));
				}
				if (isset($entry['properties']['uid'][0])) {
					$guid = $entry['properties']['uid'][0];
					if (isset($guid['value'])) $guid = $guid['value'];
					$item['guid'] = array(array('data' => $guid));
				}
				if (isset($entry['properties']['name'][0])) {
					$title = $entry['properties']['name'][0];
					if (isset($title['value'])) $title = $title['value'];
					$item['title'] = array(array('data' => $title));
				}
				if (isset($entry['properties']['author'][0]) || isset($feed_author)) {
					// author is a special case, it can be plain text or an h-card array.
					// If it's plain text it can also be a url that should be followed to
					// get the actual h-card.
					$author = isset($entry['properties']['author'][0]) ?
						$entry['properties']['author'][0] : $feed_author;
					if (!is_string($author)) {
						$author = $this->parse_hcard($author);
					}
					else if (strpos($author, 'http') === 0) {
						if (isset($author_cache[$author])) {
							$author = $author_cache[$author];
						}
						else {
							$mf = Mf2\fetch($author);
							foreach ($mf['items'] as $hcard) {
								// Only interested in an h-card by itself in this case.
								if (!in_array('h-card', $hcard['type'])) {
									continue;
								}
								// It must have a url property matching what we fetched.
								if (!isset($hcard['properties']['url']) ||
										!(in_array($author, $hcard['properties']['url']))) {
									continue;
								}
								// Save parse_hcard the trouble of finding the correct url.
								$hcard['properties']['url'][0] = $author;
								// Cache this h-card for the next h-entry to check.
								$author_cache[$author] = $this->parse_hcard($hcard);
								$author = $author_cache[$author];
								break;
							}
						}
					}
					$item['author'] = array(array('data' => $author));
				}
				if (isset($entry['properties']['photo'][0])) {
					// If a photo is also in content, don't need to add it again here.
					$content = '';
					if (isset($entry['properties']['content'][0]['html'])) {
						$content = $entry['properties']['content'][0]['html'];
					}
					$photo_list = array();
					for ($j = 0; $j < count($entry['properties']['photo']); $j++) {
						$photo = $entry['properties']['photo'][$j];
						if (!empty($photo) && strpos($content, $photo) === false) {
							$photo_list[] = $photo;
						}
					}
					// When there's more than one photo show the first and use a lightbox.
					// Need a permanent, unique name for the image set, but don't have
					// anything unique except for the content itself, so use that.
					$count = count($photo_list);
					if ($count > 1) {
						$image_set_id = preg_replace('/[[:^alnum:]]/', '', $photo_list[0]);
						$description = '';
						for ($j = 0; $j < $count; $j++) {
							$hidden = $j === 0 ? '' : 'class="hidden" ';
							$description .= '<a href="'.$photo_list[$j].'" '.$hidden.
								'data-lightbox="image-set-'.$image_set_id.'">'.
								'<img src="'.$photo_list[$j].'"></a>';
						}
						$description .= ' '.$count.' photos';
					}
					else if ($count == 1) {
						$description = '<img src="'.$photo_list[0].'">';
					}
				}
				if (isset($entry['properties']['content'][0]['html'])) {
					// e-content['value'] is the same as p-name when they are on the same
					// element. Use this to replace title with a strip_tags version so
					// that alt text from images is not included in the title.
					if ($entry['properties']['content'][0]['value'] === $title) {
						$title = strip_tags($entry['properties']['content'][0]['html']);
						$item['title'] = array(array('data' => $title));
					}
					$description .= $entry['properties']['content'][0]['html'];
					if (isset($entry['properties']['in-reply-to'][0])) {
						$in_reply_to = '';
						if (is_string($entry['properties']['in-reply-to'][0])) {
							$in_reply_to = $entry['properties']['in-reply-to'][0];
						}
						else if (isset($entry['properties']['in-reply-to'][0]['value'])) {
							$in_reply_to = $entry['properties']['in-reply-to'][0]['value'];
						}
						if ($in_reply_to !== '') {
							$description .= ' '.
								'<a href="'.$in_reply_to.'">'.$in_reply_to.'</a>';
						}
					}
					$item['description'] = array(array('data' => $description));
				}
				if (isset($entry['properties']['category'])) {
					$category_csv = '';
					// Categories can also contain h-cards.
					foreach ($entry['properties']['category'] as $category) {
						if ($category_csv !== '') $category_csv .= ', ';
						if (is_string($category)) {
							// Can't have commas in categories.
							$category_csv .= str_replace(',', '', $category);
						}
						else {
							$category_csv .= $this->parse_hcard($category, true);
						}
					}
					$item['category'] = array(array('data' => $category_csv));
				}
				if (isset($entry['properties']['published'][0])) {
					$timestamp = strtotime($entry['properties']['published'][0]);
					$pub_date = date('F j Y g:ia', $timestamp).' GMT';
					$item['pubDate'] = array(array('data' => $pub_date));
				}
				// The title and description are set to the empty string to represent
				// a deleted item (which also makes it an invalid rss item).
				if (isset($entry['properties']['deleted'][0])) {
					$item['title'] = array(array('data' => ''));
					$item['description'] = array(array('data' => ''));
				}
				$items[] = array('child' => array('' => $item));
			}
		}
		// Mimic RSS data format when storing microformats.
		$link = array(array('data' => $url));
		$image = '';
		if (!is_string($feed_author) &&
				isset($feed_author['properties']['photo'][0])) {
			$image = array(array('child' => array('' => array('url' =>
				array(array('data' => $feed_author['properties']['photo'][0]))))));
		}
		// Use the name given for the h-feed, or get the title from the html.
		if ($feed_title !== '') {
			$feed_title = array(array('data' => htmlspecialchars($feed_title)));
		}
		else if ($position = strpos($data, '<title>')) {
			$start = $position < 200 ? 0 : $position - 200;
			$check = substr($data, $start, 400);
			$matches = array();
			if (preg_match('/<title>(.+)<\/title>/', $check, $matches)) {
				$feed_title = array(array('data' => htmlspecialchars($matches[1])));
			}
		}
		$channel = array('channel' => array(array('child' => array('' =>
			array('link' => $link, 'image' => $image, 'title' => $feed_title,
			 'item' => $items)))));
		$rss = array(array('attribs' => array('' => array('version' => '2.0')),
		 'child' => array('' => $channel)));
		$this->data = array('child' => array('' => array('rss' => $rss)));
		return true;
	}

private function declare_html_entities() {
		// This is required because the RSS specification says that entity-encoded
		// html is allowed, but the xml specification says they must be declared.
		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;"> ]>';
	}
}

Editing: Parser.php

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