<?php

if(!class_exists('simple_html_dom')) {
	/**
	 * Website: http://sourceforge.net/projects/simplehtmldom/
	 * Additional projects: http://sourceforge.net/projects/debugobject/
	 * Acknowledge: Jose Solorzano (https://sourceforge.net/projects/php-html/)
	 *
	 * Licensed under The MIT License
	 * See the LICENSE file in the project root for more information.
	 *
	 * Authors:
	 *   S.C. Chen
	 *   John Schlick
	 *   Rus Carroll
	 *   logmanoriginal
	 *
	 * Contributors:
	 *   Yousuke Kumakura
	 *   Vadim Voituk
	 *   Antcs
	 *
	 * Version Rev. 1.9.1 (291)
	 */

	define('HDOM_TYPE_ELEMENT', 1);
	define('HDOM_TYPE_COMMENT', 2);
	define('HDOM_TYPE_TEXT', 3);
	define('HDOM_TYPE_ENDTAG', 4);
	define('HDOM_TYPE_ROOT', 5);
	define('HDOM_TYPE_UNKNOWN', 6);
	define('HDOM_QUOTE_DOUBLE', 0);
	define('HDOM_QUOTE_SINGLE', 1);
	define('HDOM_QUOTE_NO', 3);
	define('HDOM_INFO_BEGIN', 0);
	define('HDOM_INFO_END', 1);
	define('HDOM_INFO_QUOTE', 2);
	define('HDOM_INFO_SPACE', 3);
	define('HDOM_INFO_TEXT', 4);
	define('HDOM_INFO_INNER', 5);
	define('HDOM_INFO_OUTER', 6);
	define('HDOM_INFO_ENDSPACE', 7);

	defined('DEFAULT_TARGET_CHARSET') || define('DEFAULT_TARGET_CHARSET', 'UTF-8');
	defined('DEFAULT_BR_TEXT') || define('DEFAULT_BR_TEXT', "\r\n");
	defined('DEFAULT_SPAN_TEXT') || define('DEFAULT_SPAN_TEXT', ' ');
	defined('MAX_FILE_SIZE') || define('MAX_FILE_SIZE', 100000000);
	define('HDOM_SMARTY_AS_TEXT', 1);

	function file_get_html(
		$url,
		$use_include_path = false,
		$context = null,
		$offset = 0,
		$maxLen = -1,
		$lowercase = true,
		$forceTagsClosed = true,
		$target_charset = DEFAULT_TARGET_CHARSET,
		$stripRN = false,
		$defaultBRText = DEFAULT_BR_TEXT,
		$defaultSpanText = DEFAULT_SPAN_TEXT)
	{
		if($maxLen <= 0) { $maxLen = MAX_FILE_SIZE; }

		$dom = new simple_html_dom(
			null,
			$lowercase,
			$forceTagsClosed,
			$target_charset,
			$stripRN,
			$defaultBRText,
			$defaultSpanText
		);

		/**
		 * For sourceforge users: uncomment the next line and comment the
		 * retrieve_url_contents line 2 lines down if it is not already done.
		 */
		$contents = file_get_contents(
			$url,
			$use_include_path,
			$context,
			$offset,
			$maxLen
		);
		// $contents = retrieve_url_contents($url);

		if (empty($contents) || strlen($contents) > $maxLen) {
			$dom->clear();
			return false;
		}

		return $dom->load($contents, $lowercase, $stripRN);
	}

	function str_get_html(
		$str,
		$lowercase = true,
		$forceTagsClosed = true,
		$target_charset = DEFAULT_TARGET_CHARSET,
		$stripRN = false,
		$defaultBRText = DEFAULT_BR_TEXT,
		$defaultSpanText = DEFAULT_SPAN_TEXT)
	{
		$dom = new simple_html_dom(
			null,
			$lowercase,
			$forceTagsClosed,
			$target_charset,
			$stripRN,
			$defaultBRText,
			$defaultSpanText
		);

		if (empty($str) || strlen($str) > MAX_FILE_SIZE) {
			$dom->clear();
			return false;
		}

		return $dom->load($str, $lowercase, $stripRN);
	}

	function dump_html_tree($node, $show_attr = true, $deep = 0)
	{
		$node->dump($node);
	}

	class simple_html_dom_node
	{
		public $nodetype = HDOM_TYPE_TEXT;
		public $tag = 'text';
		public $attr = array();
		public $children = array();
		public $nodes = array();
		public $parent = null;
		public $_ = array();
		public $tag_start = 0;
		private $dom = null;

		function __construct($dom)
		{
			$this->dom = $dom;
			$dom->nodes[] = $this;
		}

		function __destruct()
		{
			$this->clear();
		}

		function __toString()
		{
			return $this->outertext();
		}

		function clear()
		{
			$this->dom = null;
			$this->nodes = null;
			$this->parent = null;
			$this->children = null;
		}

		function dump($show_attr = true, $depth = 0)
		{
			echo str_repeat("\t", $depth) . $this->tag;

			if ($show_attr && count($this->attr) > 0) {
				echo '(';
				foreach ($this->attr as $k => $v) {
					echo "[$k]=>\"$v\", ";
				}
				echo ')';
			}

			echo "\n";

			if ($this->nodes) {
				foreach ($this->nodes as $node) {
					$node->dump($show_attr, $depth + 1);
				}
			}
		}

		function dump_node($echo = true)
		{
			$string = $this->tag;

			if (count($this->attr) > 0) {
				$string .= '(';
				foreach ($this->attr as $k => $v) {
					$string .= "[$k]=>\"$v\", ";
				}
				$string .= ')';
			}

			if (count($this->_) > 0) {
				$string .= ' $_ (';
				foreach ($this->_ as $k => $v) {
					if (is_array($v)) {
						$string .= "[$k]=>(";
						foreach ($v as $k2 => $v2) {
							$string .= "[$k2]=>\"$v2\", ";
						}
						$string .= ')';
					} else {
						$string .= "[$k]=>\"$v\", ";
					}
				}
				$string .= ')';
			}

			if (isset($this->text)) {
				$string .= " text: ({$this->text})";
			}

			$string .= ' HDOM_INNER_INFO: ';

			if (isset($node->_[HDOM_INFO_INNER])) {
				$string .= "'" . $node->_[HDOM_INFO_INNER] . "'";
			} else {
				$string .= ' NULL ';
			}

			$string .= ' children: ' . count($this->children);
			$string .= ' nodes: ' . count($this->nodes);
			$string .= ' tag_start: ' . $this->tag_start;
			$string .= "\n";

			if ($echo) {
				echo $string;
				return;
			} else {
				return $string;
			}
		}

		function parent($parent = null)
		{
			// I am SURE that this doesn't work properly.
			// It fails to unset the current node from it's current parents nodes or
			// children list first.
			if ($parent !== null) {
				$this->parent = $parent;
				$this->parent->nodes[] = $this;
				$this->parent->children[] = $this;
			}

			return $this->parent;
		}

		function has_child()
		{
			return !empty($this->children);
		}

		function children($idx = -1)
		{
			if ($idx === -1) {
				return $this->children;
			}

			if (isset($this->children[$idx])) {
				return $this->children[$idx];
			}

			return null;
		}

		function first_child()
		{
			if (count($this->children) > 0) {
				return $this->children[0];
			}
			return null;
		}

		function last_child()
		{
			if (count($this->children) > 0) {
				return end($this->children);
			}
			return null;
		}

		function next_sibling()
		{
			if ($this->parent === null) {
				return null;
			}

			$idx = array_search($this, $this->parent->children, true);

			if ($idx !== false && isset($this->parent->children[$idx + 1])) {
				return $this->parent->children[$idx + 1];
			}

			return null;
		}

		function prev_sibling()
		{
			if ($this->parent === null) {
				return null;
			}

			$idx = array_search($this, $this->parent->children, true);

			if ($idx !== false && $idx > 0) {
				return $this->parent->children[$idx - 1];
			}

			return null;
		}

		function find_ancestor_tag($tag)
		{
			global $debug_object;
			if (is_object($debug_object)) { $debug_object->debug_log_entry(1); }

			if ($this->parent === null) {
				return null;
			}

			$ancestor = $this->parent;

			while (!is_null($ancestor)) {
				if (is_object($debug_object)) {
					$debug_object->debug_log(2, 'Current tag is: ' . $ancestor->tag);
				}

				if ($ancestor->tag === $tag) {
					break;
				}

				$ancestor = $ancestor->parent;
			}

			return $ancestor;
		}

		function innertext()
		{
			if (isset($this->_[HDOM_INFO_INNER])) {
				return $this->_[HDOM_INFO_INNER];
			}

			if (isset($this->_[HDOM_INFO_TEXT])) {
				return $this->dom->restore_noise($this->_[HDOM_INFO_TEXT]);
			}

			$ret = '';

			foreach ($this->nodes as $n) {
				$ret .= $n->outertext();
			}

			return $ret;
		}

		function outertext()
		{
			global $debug_object;

			if (is_object($debug_object)) {
				$text = '';

				if ($this->tag === 'text') {
					if (!empty($this->text)) {
						$text = ' with text: ' . $this->text;
					}
				}

				$debug_object->debug_log(1, 'Innertext of tag: ' . $this->tag . $text);
			}

			if ($this->tag === 'root') {
				return $this->innertext();
			}

			// todo: What is the use of this callback? Remove?
			if ($this->dom && $this->dom->callback !== null) {
				call_user_func_array($this->dom->callback, array($this));
			}

			if (isset($this->_[HDOM_INFO_OUTER])) {
				return $this->_[HDOM_INFO_OUTER];
			}

			if (isset($this->_[HDOM_INFO_TEXT])) {
				return $this->dom->restore_noise($this->_[HDOM_INFO_TEXT]);
			}

			$ret = '';

			if ($this->dom && $this->dom->nodes[$this->_[HDOM_INFO_BEGIN]]) {
				$ret = $this->dom->nodes[$this->_[HDOM_INFO_BEGIN]]->makeup();
			}

			if (isset($this->_[HDOM_INFO_INNER])) {
				// todo: <br> should either never have HDOM_INFO_INNER or always
				if ($this->tag !== 'br') {
					$ret .= $this->_[HDOM_INFO_INNER];
				}
			} elseif ($this->nodes) {
				foreach ($this->nodes as $n) {
					$ret .= $this->convert_text($n->outertext());
				}
			}

			if (isset($this->_[HDOM_INFO_END]) && $this->_[HDOM_INFO_END] != 0) {
				$ret .= '</' . $this->tag . '>';
			}

			return $ret;
		}

		function text()
		{
			if (isset($this->_[HDOM_INFO_INNER])) {
				return $this->_[HDOM_INFO_INNER];
			}

			switch ($this->nodetype) {
				case HDOM_TYPE_TEXT: return $this->dom->restore_noise($this->_[HDOM_INFO_TEXT]);
				case HDOM_TYPE_COMMENT: return '';
				case HDOM_TYPE_UNKNOWN: return '';
			}

			if (strcasecmp($this->tag, 'script') === 0) { return ''; }
			if (strcasecmp($this->tag, 'style') === 0) { return ''; }

			$ret = '';

			// In rare cases, (always node type 1 or HDOM_TYPE_ELEMENT - observed
			// for some span tags, and some p tags) $this->nodes is set to NULL.
			// NOTE: This indicates that there is a problem where it's set to NULL
			// without a clear happening.
			// WHY is this happening?
			if (!is_null($this->nodes)) {
				foreach ($this->nodes as $n) {
					// Start paragraph after a blank line
					if ($n->tag === 'p') {
						$ret = trim($ret) . "\n\n";
					}

					$ret .= $this->convert_text($n->text());

					// If this node is a span... add a space at the end of it so
					// multiple spans don't run into each other.  This is plaintext
					// after all.
					if ($n->tag === 'span') {
						$ret .= $this->dom->default_span_text;
					}
				}
			}
			return $ret;
		}

		function xmltext()
		{
			$ret = $this->innertext();
			$ret = str_ireplace('<![CDATA[', '', $ret);
			$ret = str_replace(']]>', '', $ret);
			return $ret;
		}

		function makeup()
		{
			// text, comment, unknown
			if (isset($this->_[HDOM_INFO_TEXT])) {
				return $this->dom->restore_noise($this->_[HDOM_INFO_TEXT]);
			}

			$ret = '<' . $this->tag;
			$i = -1;

			foreach ($this->attr as $key => $val) {
				++$i;

				// skip removed attribute
				if ($val === null || $val === false) { continue; }

				$ret .= $this->_[HDOM_INFO_SPACE][$i][0];

				//no value attr: nowrap, checked selected...
				if ($val === true) {
					$ret .= $key;
				} else {
					switch ($this->_[HDOM_INFO_QUOTE][$i])
					{
						case HDOM_QUOTE_DOUBLE: $quote = '"'; break;
						case HDOM_QUOTE_SINGLE: $quote = '\''; break;
						default: $quote = '';
					}

					$ret .= $key
					. $this->_[HDOM_INFO_SPACE][$i][1]
					. '='
					. $this->_[HDOM_INFO_SPACE][$i][2]
					. $quote
					. $val
					. $quote;
				}
			}

			$ret = $this->dom->restore_noise($ret);
			return $ret . $this->_[HDOM_INFO_ENDSPACE] . '>';
		}

		function find($selector, $idx = null, $lowercase = false)
		{
			$selectors = $this->parse_selector($selector);
			if (($count = count($selectors)) === 0) { return array(); }
			$found_keys = array();

			// find each selector
			for ($c = 0; $c < $count; ++$c) {
				// The change on the below line was documented on the sourceforge
				// code tracker id 2788009
				// used to be: if (($levle=count($selectors[0]))===0) return array();
				if (($levle = count($selectors[$c])) === 0) { return array(); }
				if (!isset($this->_[HDOM_INFO_BEGIN])) { return array(); }

				$head = array($this->_[HDOM_INFO_BEGIN] => 1);
				$cmd = ' '; // Combinator

				// handle descendant selectors, no recursive!
				for ($l = 0; $l < $levle; ++$l) {
					$ret = array();

					foreach ($head as $k => $v) {
						$n = ($k === -1) ? $this->dom->root : $this->dom->nodes[$k];
						//PaperG - Pass this optional parameter on to the seek function.
						$n->seek($selectors[$c][$l], $ret, $cmd, $lowercase);
					}

					$head = $ret;
					$cmd = $selectors[$c][$l][4]; // Next Combinator
				}

				foreach ($head as $k => $v) {
					if (!isset($found_keys[$k])) {
						$found_keys[$k] = 1;
					}
				}
			}

			// sort keys
			ksort($found_keys);

			$found = array();
			foreach ($found_keys as $k => $v) {
				$found[] = $this->dom->nodes[$k];
			}

			// return nth-element or array
			if (is_null($idx)) { return $found; }
			elseif ($idx < 0) { $idx = count($found) + $idx; }
			return (isset($found[$idx])) ? $found[$idx] : null;
		}

		protected function seek($selector, &$ret, $parent_cmd, $lowercase = false)
		{
			global $debug_object;
			if (is_object($debug_object)) { $debug_object->debug_log_entry(1); }

			list($tag, $id, $class, $attributes, $cmb) = $selector;
			$nodes = array();

			if ($parent_cmd === ' ') { // Descendant Combinator
				// Find parent closing tag if the current element doesn't have a closing
				// tag (i.e. void element)
				$end = (!empty($this->_[HDOM_INFO_END])) ? $this->_[HDOM_INFO_END] : 0;
				if ($end == 0) {
					$parent = $this->parent;
					while (!isset($parent->_[HDOM_INFO_END]) && $parent !== null) {
						$end -= 1;
						$parent = $parent->parent;
					}
					$end += $parent->_[HDOM_INFO_END];
				}

				// Get list of target nodes
				$nodes_start = $this->_[HDOM_INFO_BEGIN] + 1;
				$nodes_count = $end - $nodes_start;
				$nodes = array_slice($this->dom->nodes, $nodes_start, $nodes_count, true);
			} elseif ($parent_cmd === '>') { // Child Combinator
				$nodes = $this->children;
			} elseif ($parent_cmd === '+'
				&& $this->parent
				&& in_array($this, $this->parent->children)) { // Next-Sibling Combinator
					$index = array_search($this, $this->parent->children, true) + 1;
					if ($index < count($this->parent->children))
						$nodes[] = $this->parent->children[$index];
			} elseif ($parent_cmd === '~'
				&& $this->parent
				&& in_array($this, $this->parent->children)) { // Subsequent Sibling Combinator
					$index = array_search($this, $this->parent->children, true);
					$nodes = array_slice($this->parent->children, $index);
			}

			// Go throgh each element starting at this element until the end tag
			// Note: If this element is a void tag, any previous void element is
			// skipped.
			foreach($nodes as $node) {
				$pass = true;

				// Skip root nodes
				if(!$node->parent) {
					$pass = false;
				}

				// Handle 'text' selector
				if($pass && $tag === 'text' && $node->tag === 'text') {
					$ret[array_search($node, $this->dom->nodes, true)] = 1;
					unset($node);
					continue;
				}

				// Skip if node isn't a child node (i.e. text nodes)
				if($pass && !in_array($node, $node->parent->children, true)) {
					$pass = false;
				}

				// Skip if tag doesn't match
				if ($pass && $tag !== '' && $tag !== $node->tag && $tag !== '*') {
					$pass = false;
				}

				// Skip if ID doesn't exist
				if ($pass && $id !== '' && !isset($node->attr['id'])) {
					$pass = false;
				}

				// Check if ID matches
				if ($pass && $id !== '' && isset($node->attr['id'])) {
					// Note: Only consider the first ID (as browsers do)
					$node_id = explode(' ', trim($node->attr['id']))[0];

					if($id !== $node_id) { $pass = false; }
				}

				// Check if all class(es) exist
				if ($pass && $class !== '' && is_array($class) && !empty($class)) {
					if (isset($node->attr['class'])) {
						$node_classes = explode(' ', $node->attr['class']);

						if ($lowercase) {
							$node_classes = array_map('strtolower', $node_classes);
						}

						foreach($class as $c) {
							if(!in_array($c, $node_classes)) {
								$pass = false;
								break;
							}
						}
					} else {
						$pass = false;
					}
				}

				// Check attributes
				if ($pass
					&& $attributes !== ''
					&& is_array($attributes)
					&& !empty($attributes)) {
						foreach($attributes as $a) {
							list (
								$att_name,
								$att_expr,
								$att_val,
								$att_inv,
								$att_case_sensitivity
							) = $a;

							// Handle indexing attributes (i.e. "[2]")
							/**
							 * Note: This is not supported by the CSS Standard but adds
							 * the ability to select items compatible to XPath (i.e.
							 * the 3rd element within it's parent).
							 *
							 * Note: This doesn't conflict with the CSS Standard which
							 * doesn't work on numeric attributes anyway.
							 */
							if (is_numeric($att_name)
								&& $att_expr === ''
								&& $att_val === '') {
									$count = 0;

									// Find index of current element in parent
									foreach ($node->parent->children as $c) {
										if ($c->tag === $node->tag) ++$count;
										if ($c === $node) break;
									}

									// If this is the correct node, continue with next
									// attribute
									if ($count === (int)$att_name) continue;
							}

							// Check attribute availability
							if ($att_inv) { // Attribute should NOT be set
								if (isset($node->attr[$att_name])) {
									$pass = false;
									break;
								}
							} else { // Attribute should be set
								// todo: "plaintext" is not a valid CSS selector!
								if ($att_name !== 'plaintext'
									&& !isset($node->attr[$att_name])) {
										$pass = false;
										break;
								}
							}

							// Continue with next attribute if expression isn't defined
							if ($att_expr === '') continue;

							// If they have told us that this is a "plaintext"
							// search then we want the plaintext of the node - right?
							// todo "plaintext" is not a valid CSS selector!
							if ($att_name === 'plaintext') {
								$nodeKeyValue = $node->text();
							} else {
								$nodeKeyValue = $node->attr[$att_name];
							}

							if (is_object($debug_object)) {
								$debug_object->debug_log(2,
									'testing node: '
									. $node->tag
									. ' for attribute: '
									. $att_name
									. $att_expr
									. $att_val
									. ' where nodes value is: '
									. $nodeKeyValue
								);
							}

							// If lowercase is set, do a case insensitive test of
							// the value of the selector.
							if ($lowercase) {
								$check = $this->match(
									$att_expr,
									strtolower($att_val),
									strtolower($nodeKeyValue),
									$att_case_sensitivity
								);
							} else {
								$check = $this->match(
									$att_expr,
									$att_val,
									$nodeKeyValue,
									$att_case_sensitivity
								);
							}

							if (is_object($debug_object)) {
								$debug_object->debug_log(2,
									'after match: '
									. ($check ? 'true' : 'false')
								);
							}

							if (!$check) {
								$pass = false;
								break;
							}
						}
				}

				// Found a match. Add to list and clear node
				if ($pass) $ret[$node->_[HDOM_INFO_BEGIN]] = 1;
				unset($node);
			}
			// It's passed by reference so this is actually what this function returns.
			if (is_object($debug_object)) {
				$debug_object->debug_log(1, 'EXIT - ret: ', $ret);
			}
		}

		protected function match($exp, $pattern, $value, $case_sensitivity)
		{
			global $debug_object;
			if (is_object($debug_object)) {$debug_object->debug_log_entry(1);}

			if ($case_sensitivity === 'i') {
				$pattern = strtolower($pattern);
				$value = strtolower($value);
			}

			switch ($exp) {
				case '=':
					return ($value === $pattern);
				case '!=':
					return ($value !== $pattern);
				case '^=':
					return preg_match('/^' . preg_quote($pattern, '/') . '/', $value);
				case '$=':
					return preg_match('/' . preg_quote($pattern, '/') . '$/', $value);
				case '*=':
					return preg_match('/' . preg_quote($pattern, '/') . '/', $value);
				case '|=':
					/**
					 * [att|=val]
					 *
					 * Represents an element with the att attribute, its value
					 * either being exactly "val" or beginning with "val"
					 * immediately followed by "-" (U+002D).
					 */
					return strpos($value, $pattern) === 0;
				case '~=':
					/**
					 * [att~=val]
					 *
					 * Represents an element with the att attribute whose value is a
					 * whitespace-separated list of words, one of which is exactly
					 * "val". If "val" contains whitespace, it will never represent
					 * anything (since the words are separated by spaces). Also if
					 * "val" is the empty string, it will never represent anything.
					 */
					return in_array($pattern, explode(' ', trim($value)), true);
			}
			return false;
		}

		protected function parse_selector($selector_string)
		{
			global $debug_object;
			if (is_object($debug_object)) { $debug_object->debug_log_entry(1); }

			/**
			 * Pattern of CSS selectors, modified from mootools (https://mootools.net/)
			 *
			 * Paperg: Add the colon to the attribute, so that it properly finds
			 * <tag attr:ibute="something" > like google does.
			 *
			 * Note: if you try to look at this attribute, you MUST use getAttribute
			 * since $dom->x:y will fail the php syntax check.
			 *
			 * Notice the \[ starting the attribute? and the @? following? This
			 * implies that an attribute can begin with an @ sign that is not
			 * captured. This implies that an html attribute specifier may start
			 * with an @ sign that is NOT captured by the expression. Farther study
			 * is required to determine of this should be documented or removed.
			 *
			 * Matches selectors in this order:
			 *
			 * [0] - full match
			 *
			 * [1] - tag name
			 *     ([\w:\*-]*)
			 *     Matches the tag name consisting of zero or more words, colons,
			 *     asterisks and hyphens.
			 *
			 * [2] - id name
			 *     (?:\#([\w-]+))
			 *     Optionally matches a id name, consisting of an "#" followed by
			 *     the id name (one or more words and hyphens).
			 *
			 * [3] - class names (including dots)
			 *     (?:\.([\w\.-]+))?
			 *     Optionally matches a list of classs, consisting of an "."
			 *     followed by the class name (one or more words and hyphens)
			 *     where multiple classes can be chained (i.e. ".foo.bar.baz")
			 *
			 * [4] - attributes
			 *     ((?:\[@?(?:!?[\w:-]+)(?:(?:[!*^$|~]?=)[\"']?(?:.*?)[\"']?)?(?:\s*?(?:[iIsS])?)?\])+)?
			 *     Optionally matches the attributes list
			 *
			 * [5] - separator
			 *     ([\/, >+~]+)
			 *     Matches the selector list separator
			 */
			// phpcs:ignore Generic.Files.LineLength
			$pattern = "/([\w:\*-]*)(?:\#([\w-]+))?(?:|\.([\w\.-]+))?((?:\[@?(?:!?[\w:-]+)(?:(?:[!*^$|~]?=)[\"']?(?:.*?)[\"']?)?(?:\s*?(?:[iIsS])?)?\])+)?([\/, >+~]+)/is";

			preg_match_all(
				$pattern,
				trim($selector_string) . ' ', // Add final ' ' as pseudo separator
				$matches,
				PREG_SET_ORDER
			);

			if (is_object($debug_object)) {
				$debug_object->debug_log(2, 'Matches Array: ', $matches);
			}

			$selectors = array();
			$result = array();

			foreach ($matches as $m) {
				$m[0] = trim($m[0]);

				// Skip NoOps
				if ($m[0] === '' || $m[0] === '/' || $m[0] === '//') { continue; }

				// Convert to lowercase
				if ($this->dom->lowercase) {
					$m[1] = strtolower($m[1]);
				}

				// Extract classes
				if ($m[3] !== '') { $m[3] = explode('.', $m[3]); }

				/* Extract attributes (pattern based on the pattern above!)

				* [0] - full match
				* [1] - attribute name
				* [2] - attribute expression
				* [3] - attribute value
				* [4] - case sensitivity
				*
				* Note: Attributes can be negated with a "!" prefix to their name
				*/
				if($m[4] !== '') {
					preg_match_all(
						"/\[@?(!?[\w:-]+)(?:([!*^$|~]?=)[\"']?(.*?)[\"']?)?(?:\s+?([iIsS])?)?\]/is",
						trim($m[4]),
						$attributes,
						PREG_SET_ORDER
					);

					// Replace element by array
					$m[4] = array();

					foreach($attributes as $att) {
						// Skip empty matches
						if(trim($att[0]) === '') { continue; }

						$inverted = (isset($att[1][0]) && $att[1][0] === '!');
						$m[4][] = array(
							$inverted ? substr($att[1], 1) : $att[1], // Name
							(isset($att[2])) ? $att[2] : '', // Expression
							(isset($att[3])) ? $att[3] : '', // Value
							$inverted, // Inverted Flag
							(isset($att[4])) ? strtolower($att[4]) : '', // Case-Sensitivity
						);
					}
				}

				// Sanitize Separator
				if ($m[5] !== '' && trim($m[5]) === '') { // Descendant Separator
					$m[5] = ' ';
				} else { // Other Separator
					$m[5] = trim($m[5]);
				}

				// Clear Separator if it's a Selector List
				if ($is_list = ($m[5] === ',')) { $m[5] = ''; }

				// Remove full match before adding to results
				array_shift($m);
				$result[] = $m;

				if ($is_list) { // Selector List
					$selectors[] = $result;
					$result = array();
				}
			}

			if (count($result) > 0) { $selectors[] = $result; }
			return $selectors;
		}

		function __get($name)
		{
			if (isset($this->attr[$name])) {
				return $this->convert_text($this->attr[$name]);
			}
			switch ($name) {
				case 'outertext': return $this->outertext();
				case 'innertext': return $this->innertext();
				case 'plaintext': return $this->text();
				case 'xmltext': return $this->xmltext();
				default: return array_key_exists($name, $this->attr);
			}
		}

		function __set($name, $value)
		{
			global $debug_object;
			if (is_object($debug_object)) { $debug_object->debug_log_entry(1); }

			switch ($name) {
				case 'outertext': return $this->_[HDOM_INFO_OUTER] = $value;
				case 'innertext':
					if (isset($this->_[HDOM_INFO_TEXT])) {
						return $this->_[HDOM_INFO_TEXT] = $value;
					}
					return $this->_[HDOM_INFO_INNER] = $value;
			}

			if (!isset($this->attr[$name])) {
				$this->_[HDOM_INFO_SPACE][] = array(' ', '', '');
				$this->_[HDOM_INFO_QUOTE][] = HDOM_QUOTE_DOUBLE;
			}

			$this->attr[$name] = $value;
		}

		function __isset($name)
		{
			switch ($name) {
				case 'outertext': return true;
				case 'innertext': return true;
				case 'plaintext': return true;
			}
			//no value attr: nowrap, checked selected...
			return (array_key_exists($name, $this->attr)) ? true : isset($this->attr[$name]);
		}

		function __unset($name)
		{
			if (isset($this->attr[$name])) { unset($this->attr[$name]); }
		}

		function convert_text($text)
		{
			global $debug_object;
			if (is_object($debug_object)) { $debug_object->debug_log_entry(1); }

			$converted_text = $text;

			$sourceCharset = '';
			$targetCharset = '';

			if ($this->dom) {
				$sourceCharset = strtoupper($this->dom->_charset);
				$targetCharset = strtoupper($this->dom->_target_charset);
			}

			if (is_object($debug_object)) {
				$debug_object->debug_log(3,
					'source charset: '
					. $sourceCharset
					. ' target charaset: '
					. $targetCharset
				);
			}

			if (!empty($sourceCharset)
				&& !empty($targetCharset)
				&& (strcasecmp($sourceCharset, $targetCharset) != 0)) {
				// Check if the reported encoding could have been incorrect and the text is actually already UTF-8
				if ((strcasecmp($targetCharset, 'UTF-8') == 0)
					&& ($this->is_utf8($text))) {
					$converted_text = $text;
				} else {
					$converted_text = iconv($sourceCharset, $targetCharset, $text);
				}
			}

			// Lets make sure that we don't have that silly BOM issue with any of the utf-8 text we output.
			if ($targetCharset === 'UTF-8') {
				if (substr($converted_text, 0, 3) === "\xef\xbb\xbf") {
					$converted_text = substr($converted_text, 3);
				}

				if (substr($converted_text, -3) === "\xef\xbb\xbf") {
					$converted_text = substr($converted_text, 0, -3);
				}
			}

			return $converted_text;
		}

		static function is_utf8($str)
		{
			$c = 0; $b = 0;
			$bits = 0;
			$len = strlen($str);
			for($i = 0; $i < $len; $i++) {
				$c = ord($str[$i]);
				if($c > 128) {
					if(($c >= 254)) { return false; }
					elseif($c >= 252) { $bits = 6; }
					elseif($c >= 248) { $bits = 5; }
					elseif($c >= 240) { $bits = 4; }
					elseif($c >= 224) { $bits = 3; }
					elseif($c >= 192) { $bits = 2; }
					else { return false; }
					if(($i + $bits) > $len) { return false; }
					while($bits > 1) {
						$i++;
						$b = ord($str[$i]);
						if($b < 128 || $b > 191) { return false; }
						$bits--;
					}
				}
			}
			return true;
		}

		function get_display_size()
		{
			global $debug_object;

			$width = -1;
			$height = -1;

			if ($this->tag !== 'img') {
				return false;
			}

			// See if there is aheight or width attribute in the tag itself.
			if (isset($this->attr['width'])) {
				$width = $this->attr['width'];
			}

			if (isset($this->attr['height'])) {
				$height = $this->attr['height'];
			}

			// Now look for an inline style.
			if (isset($this->attr['style'])) {
				// Thanks to user gnarf from stackoverflow for this regular expression.
				$attributes = array();

				preg_match_all(
					'/([\w-]+)\s*:\s*([^;]+)\s*;?/',
					$this->attr['style'],
					$matches,
					PREG_SET_ORDER
				);

				foreach ($matches as $match) {
					$attributes[$match[1]] = $match[2];
				}

				// If there is a width in the style attributes:
				if (isset($attributes['width']) && $width == -1) {
					// check that the last two characters are px (pixels)
					if (strtolower(substr($attributes['width'], -2)) === 'px') {
						$proposed_width = substr($attributes['width'], 0, -2);
						// Now make sure that it's an integer and not something stupid.
						if (filter_var($proposed_width, FILTER_VALIDATE_INT)) {
							$width = $proposed_width;
						}
					}
				}

				// If there is a width in the style attributes:
				if (isset($attributes['height']) && $height == -1) {
					// check that the last two characters are px (pixels)
					if (strtolower(substr($attributes['height'], -2)) == 'px') {
						$proposed_height = substr($attributes['height'], 0, -2);
						// Now make sure that it's an integer and not something stupid.
						if (filter_var($proposed_height, FILTER_VALIDATE_INT)) {
							$height = $proposed_height;
						}
					}
				}

			}

			// Future enhancement:
			// Look in the tag to see if there is a class or id specified that has
			// a height or width attribute to it.

			// Far future enhancement
			// Look at all the parent tags of this image to see if they specify a
			// class or id that has an img selector that specifies a height or width
			// Note that in this case, the class or id will have the img subselector
			// for it to apply to the image.

			// ridiculously far future development
			// If the class or id is specified in a SEPARATE css file thats not on
			// the page, go get it and do what we were just doing for the ones on
			// the page.

			$result = array(
				'height' => $height,
				'width' => $width
			);

			return $result;
		}

		function save($filepath = '')
		{
			$ret = $this->outertext();

			if ($filepath !== '') {
				file_put_contents($filepath, $ret, LOCK_EX);
			}

			return $ret;
		}

		function addClass($class)
		{
			if (is_string($class)) {
				$class = explode(' ', $class);
			}

			if (is_array($class)) {
				foreach($class as $c) {
					if (isset($this->class)) {
						if ($this->hasClass($c)) {
							continue;
						} else {
							$this->class .= ' ' . $c;
						}
					} else {
						$this->class = $c;
					}
				}
			} else {
				if (is_object($debug_object)) {
					$debug_object->debug_log(2, 'Invalid type: ', gettype($class));
				}
			}
		}

		function hasClass($class)
		{
			if (is_string($class)) {
				if (isset($this->class)) {
					return in_array($class, explode(' ', $this->class), true);
				}
			} else {
				if (is_object($debug_object)) {
					$debug_object->debug_log(2, 'Invalid type: ', gettype($class));
				}
			}

			return false;
		}

		function removeClass($class = null)
		{
			if (!isset($this->class)) {
				return;
			}

			if (is_null($class)) {
				$this->removeAttribute('class');
				return;
			}

			if (is_string($class)) {
				$class = explode(' ', $class);
			}

			if (is_array($class)) {
				$class = array_diff(explode(' ', $this->class), $class);
				if (empty($class)) {
					$this->removeAttribute('class');
				} else {
					$this->class = implode(' ', $class);
				}
			}
		}

		function getAllAttributes()
		{
			return $this->attr;
		}

		function getAttribute($name)
		{
			return $this->__get($name);
		}

		function setAttribute($name, $value)
		{
			$this->__set($name, $value);
		}

		function hasAttribute($name)
		{
			return $this->__isset($name);
		}

		function removeAttribute($name)
		{
			$this->__set($name, null);
		}

		function remove()
		{
			if ($this->parent) {
				$this->parent->removeChild($this);
			}
		}

		function removeChild($node)
		{
			$nidx = array_search($node, $this->nodes, true);
			$cidx = array_search($node, $this->children, true);
			$didx = array_search($node, $this->dom->nodes, true);

			if ($nidx !== false && $cidx !== false && $didx !== false) {

				foreach($node->children as $child) {
					$node->removeChild($child);
				}

				foreach($node->nodes as $entity) {
					$enidx = array_search($entity, $node->nodes, true);
					$edidx = array_search($entity, $node->dom->nodes, true);

					if ($enidx !== false && $edidx !== false) {
						unset($node->nodes[$enidx]);
						unset($node->dom->nodes[$edidx]);
					}
				}

				unset($this->nodes[$nidx]);
				unset($this->children[$cidx]);
				unset($this->dom->nodes[$didx]);

				$node->clear();

			}
		}

		function getElementById($id)
		{
			return $this->find("#$id", 0);
		}

		function getElementsById($id, $idx = null)
		{
			return $this->find("#$id", $idx);
		}

		function getElementByTagName($name)
		{
			return $this->find($name, 0);
		}

		function getElementsByTagName($name, $idx = null)
		{
			return $this->find($name, $idx);
		}

		function parentNode()
		{
			return $this->parent();
		}

		function childNodes($idx = -1)
		{
			return $this->children($idx);
		}

		function firstChild()
		{
			return $this->first_child();
		}

		function lastChild()
		{
			return $this->last_child();
		}

		function nextSibling()
		{
			return $this->next_sibling();
		}

		function previousSibling()
		{
			return $this->prev_sibling();
		}

		function hasChildNodes()
		{
			return $this->has_child();
		}

		function nodeName()
		{
			return $this->tag;
		}

		function appendChild($node)
		{
			$node->parent($this);
			return $node;
		}

	}

	class simple_html_dom
	{
		public $root = null;
		public $nodes = array();
		public $callback = null;
		public $lowercase = false;
		public $original_size;
		public $size;

		protected $pos;
		protected $doc;
		protected $char;

		protected $cursor;
		protected $parent;
		protected $noise = array();
		protected $token_blank = " \t\r\n";
		protected $token_equal = ' =/>';
		protected $token_slash = " />\r\n\t";
		protected $token_attr = ' >';

		public $_charset = '';
		public $_target_charset = '';

		protected $default_br_text = '';

		public $default_span_text = '';

		protected $self_closing_tags = array(
			'area' => 1,
			'base' => 1,
			'br' => 1,
			'col' => 1,
			'embed' => 1,
			'hr' => 1,
			'img' => 1,
			'input' => 1,
			'link' => 1,
			'meta' => 1,
			'param' => 1,
			'source' => 1,
			'track' => 1,
			'wbr' => 1
		);
		protected $block_tags = array(
			'body' => 1,
			'div' => 1,
			'form' => 1,
			'root' => 1,
			'span' => 1,
			'table' => 1
		);
		protected $optional_closing_tags = array(
			// Not optional, see
			// https://www.w3.org/TR/html/textlevel-semantics.html#the-b-element
			'b' => array('b' => 1),
			'dd' => array('dd' => 1, 'dt' => 1),
			// Not optional, see
			// https://www.w3.org/TR/html/grouping-content.html#the-dl-element
			'dl' => array('dd' => 1, 'dt' => 1),
			'dt' => array('dd' => 1, 'dt' => 1),
			'li' => array('li' => 1),
			'optgroup' => array('optgroup' => 1, 'option' => 1),
			'option' => array('optgroup' => 1, 'option' => 1),
			'p' => array('p' => 1),
			'rp' => array('rp' => 1, 'rt' => 1),
			'rt' => array('rp' => 1, 'rt' => 1),
			'td' => array('td' => 1, 'th' => 1),
			'th' => array('td' => 1, 'th' => 1),
			'tr' => array('td' => 1, 'th' => 1, 'tr' => 1),
		);

		function __construct(
			$str = null,
			$lowercase = true,
			$forceTagsClosed = true,
			$target_charset = DEFAULT_TARGET_CHARSET,
			$stripRN = false,
			$defaultBRText = DEFAULT_BR_TEXT,
			$defaultSpanText = DEFAULT_SPAN_TEXT,
			$options = 0)
		{
			if ($str) {
				if (preg_match('/^http:\/\//i', $str) || is_file($str)) {
					$this->load_file($str);
				} else {
					$this->load(
						$str,
						$lowercase,
						$stripRN,
						$defaultBRText,
						$defaultSpanText,
						$options
					);
				}
			}
			// Forcing tags to be closed implies that we don't trust the html, but
			// it can lead to parsing errors if we SHOULD trust the html.
			if (!$forceTagsClosed) {
				$this->optional_closing_array = array();
			}

			$this->_target_charset = $target_charset;
		}

		function __destruct()
		{
			$this->clear();
		}

		function load(
			$str,
			$lowercase = true,
			$stripRN = false,
			$defaultBRText = DEFAULT_BR_TEXT,
			$defaultSpanText = DEFAULT_SPAN_TEXT,
			$options = 0)
		{
			global $debug_object;

			// prepare
			$this->prepare($str, $lowercase, $defaultBRText, $defaultSpanText);

			// Per sourceforge http://sourceforge.net/tracker/?func=detail&aid=2949097&group_id=218559&atid=1044037
			// Script tags removal now preceeds style tag removal.
			// strip out <script> tags
			$this->remove_noise("'<\s*script[^>]*[^/]>(.*?)<\s*/\s*script\s*>'is");
			$this->remove_noise("'<\s*script\s*>(.*?)<\s*/\s*script\s*>'is");

			// strip out the \r \n's if we are told to.
			if ($stripRN) {
				$this->doc = str_replace("\r", ' ', $this->doc);
				$this->doc = str_replace("\n", ' ', $this->doc);

				// set the length of content since we have changed it.
				$this->size = strlen($this->doc);
			}

			// strip out cdata
			$this->remove_noise("'<!\[CDATA\[(.*?)\]\]>'is", true);
			// strip out comments
			$this->remove_noise("'<!--(.*?)-->'is");
			// strip out <style> tags
			$this->remove_noise("'<\s*style[^>]*[^/]>(.*?)<\s*/\s*style\s*>'is");
			$this->remove_noise("'<\s*style\s*>(.*?)<\s*/\s*style\s*>'is");
			// strip out preformatted tags
			$this->remove_noise("'<\s*(?:code)[^>]*>(.*?)<\s*/\s*(?:code)\s*>'is");
			// strip out server side scripts
			$this->remove_noise("'(<\?)(.*?)(\?>)'s", true);

			if($options & HDOM_SMARTY_AS_TEXT) { // Strip Smarty scripts
				$this->remove_noise("'(\{\w)(.*?)(\})'s", true);
			}

			// parsing
			$this->parse();
			// end
			$this->root->_[HDOM_INFO_END] = $this->cursor;
			$this->parse_charset();

			// make load function chainable
			return $this;
		}

		function load_file()
		{
			$args = func_get_args();

			if(($doc = call_user_func_array('file_get_contents', $args)) !== false) {
				$this->load($doc, true);
			} else {
				return false;
			}
		}

		function set_callback($function_name)
		{
			$this->callback = $function_name;
		}

		function remove_callback()
		{
			$this->callback = null;
		}

		function save($filepath = '')
		{
			$ret = $this->root->innertext();
			if ($filepath !== '') { file_put_contents($filepath, $ret, LOCK_EX); }
			return $ret;
		}

		function find($selector, $idx = null, $lowercase = false)
		{
			return $this->root->find($selector, $idx, $lowercase);
		}

		function clear()
		{
			if (isset($this->nodes)) {
				foreach ($this->nodes as $n) {
					$n->clear();
					$n = null;
				}
			}

			// This add next line is documented in the sourceforge repository.
			// 2977248 as a fix for ongoing memory leaks that occur even with the
			// use of clear.
			if (isset($this->children)) {
				foreach ($this->children as $n) {
					$n->clear();
					$n = null;
				}
			}

			if (isset($this->parent)) {
				$this->parent->clear();
				unset($this->parent);
			}

			if (isset($this->root)) {
				$this->root->clear();
				unset($this->root);
			}

			unset($this->doc);
			unset($this->noise);
		}

		function dump($show_attr = true)
		{
			$this->root->dump($show_attr);
		}

		protected function prepare(
			$str, $lowercase = true,
			$defaultBRText = DEFAULT_BR_TEXT,
			$defaultSpanText = DEFAULT_SPAN_TEXT)
		{
			$this->clear();

			$this->doc = trim($str);
			$this->size = strlen($this->doc);
			$this->original_size = $this->size; // original size of the html
			$this->pos = 0;
			$this->cursor = 1;
			$this->noise = array();
			$this->nodes = array();
			$this->lowercase = $lowercase;
			$this->default_br_text = $defaultBRText;
			$this->default_span_text = $defaultSpanText;
			$this->root = new simple_html_dom_node($this);
			$this->root->tag = 'root';
			$this->root->_[HDOM_INFO_BEGIN] = -1;
			$this->root->nodetype = HDOM_TYPE_ROOT;
			$this->parent = $this->root;
			if ($this->size > 0) { $this->char = $this->doc[0]; }
		}

		protected function parse()
		{
			while (true) {
				// Read next tag if there is no text between current position and the
				// next opening tag.
				if (($s = $this->copy_until_char('<')) === '') {
					if($this->read_tag()) {
						continue;
					} else {
						return true;
					}
				}

				// Add a text node for text between tags
				$node = new simple_html_dom_node($this);
				++$this->cursor;
				$node->_[HDOM_INFO_TEXT] = $s;
				$this->link_nodes($node, false);
			}
		}

		protected function parse_charset()
		{
			global $debug_object;

			$charset = null;

			if (function_exists('get_last_retrieve_url_contents_content_type')) {
				$contentTypeHeader = get_last_retrieve_url_contents_content_type();
				$success = preg_match('/charset=(.+)/', $contentTypeHeader, $matches);
				if ($success) {
					$charset = $matches[1];
					if (is_object($debug_object)) {
						$debug_object->debug_log(2,
							'header content-type found charset of: '
							. $charset
						);
					}
				}
			}

			if (empty($charset)) {
				// https://www.w3.org/TR/html/document-metadata.html#statedef-http-equiv-content-type
				$el = $this->root->find('meta[http-equiv=Content-Type]', 0, true);

				if (!empty($el)) {
					$fullvalue = $el->content;
					if (is_object($debug_object)) {
						$debug_object->debug_log(2,
							'meta content-type tag found'
							. $fullvalue
						);
					}

					if (!empty($fullvalue)) {
						$success = preg_match(
							'/charset=(.+)/i',
							$fullvalue,
							$matches
						);

						if ($success) {
							$charset = $matches[1];
						} else {
							// If there is a meta tag, and they don't specify the
							// character set, research says that it's typically
							// ISO-8859-1
							if (is_object($debug_object)) {
								$debug_object->debug_log(2,
									'meta content-type tag couldn\'t be parsed. using iso-8859 default.'
								);
							}

							$charset = 'ISO-8859-1';
						}
					}
				}
			}

			if (empty($charset)) {
				// https://www.w3.org/TR/html/document-metadata.html#character-encoding-declaration
				if ($meta = $this->root->find('meta[charset]', 0)) {
					$charset = $meta->charset;
					if (is_object($debug_object)) {
						$debug_object->debug_log(2, 'meta charset: ' . $charset);
					}
				}
			}

			if (empty($charset)) {
				// Try to guess the charset based on the content
				// Requires Multibyte String (mbstring) support (optional)
				if (function_exists('mb_detect_encoding')) {
					/**
					 * mb_detect_encoding() is not intended to distinguish between
					 * charsets, especially single-byte charsets. Its primary
					 * purpose is to detect which multibyte encoding is in use,
					 * i.e. UTF-8, UTF-16, shift-JIS, etc.
					 *
					 * -- https://bugs.php.net/bug.php?id=38138
					 *
					 * Adding both CP1251/ISO-8859-5 and CP1252/ISO-8859-1 will
					 * always result in CP1251/ISO-8859-5 and vice versa.
					 *
					 * Thus, only detect if it's either UTF-8 or CP1252/ISO-8859-1
					 * to stay compatible.
					 */
					$encoding = mb_detect_encoding(
						$this->doc,
						array( 'UTF-8', 'CP1252', 'ISO-8859-1' )
					);

					if ($encoding === 'CP1252' || $encoding === 'ISO-8859-1') {
						// Due to a limitation of mb_detect_encoding
						// 'CP1251'/'ISO-8859-5' will be detected as
						// 'CP1252'/'ISO-8859-1'. This will cause iconv to fail, in
						// which case we can simply assume it is the other charset.
						if (!@iconv('CP1252', 'UTF-8', $this->doc)) {
							$encoding = 'CP1251';
						}
					}

					if ($encoding !== false) {
						$charset = $encoding;
						if (is_object($debug_object)) {
							$debug_object->debug_log(2, 'mb_detect: ' . $charset);
						}
					}
				}
			}

			if (empty($charset)) {
				// Assume it's UTF-8 as it is the most likely charset to be used
				$charset = 'UTF-8';
				if (is_object($debug_object)) {
					$debug_object->debug_log(2, 'No match found, assume ' . $charset);
				}
			}

			// Since CP1252 is a superset, if we get one of it's subsets, we want
			// it instead.
			if ((strtolower($charset) == 'iso-8859-1')
				|| (strtolower($charset) == 'latin1')
				|| (strtolower($charset) == 'latin-1')) {
				$charset = 'CP1252';
				if (is_object($debug_object)) {
					$debug_object->debug_log(2,
						'replacing ' . $charset . ' with CP1252 as its a superset'
					);
				}
			}

			if (is_object($debug_object)) {
				$debug_object->debug_log(1, 'EXIT - ' . $charset);
			}

			return $this->_charset = $charset;
		}

		protected function read_tag()
		{
			// Set end position if no further tags found
			if ($this->char !== '<') {
				$this->root->_[HDOM_INFO_END] = $this->cursor;
				return false;
			}

			$begin_tag_pos = $this->pos;
			$this->char = (++$this->pos < $this->size) ? $this->doc[$this->pos] : null; // next

			// end tag
			if ($this->char === '/') {
				$this->char = (++$this->pos < $this->size) ? $this->doc[$this->pos] : null; // next

				// Skip whitespace in end tags (i.e. in "</   html>")
				$this->skip($this->token_blank);
				$tag = $this->copy_until_char('>');

				// Skip attributes in end tags
				if (($pos = strpos($tag, ' ')) !== false) {
					$tag = substr($tag, 0, $pos);
				}

				$parent_lower = strtolower($this->parent->tag);
				$tag_lower = strtolower($tag);

				// The end tag is supposed to close the parent tag. Handle situations
				// when it doesn't
				if ($parent_lower !== $tag_lower) {
					// Parent tag does not have to be closed necessarily (optional closing tag)
					// Current tag is a block tag, so it may close an ancestor
					if (isset($this->optional_closing_tags[$parent_lower])
						&& isset($this->block_tags[$tag_lower])) {

						$this->parent->_[HDOM_INFO_END] = 0;
						$org_parent = $this->parent;

						// Traverse ancestors to find a matching opening tag
						// Stop at root node
						while (($this->parent->parent)
							&& strtolower($this->parent->tag) !== $tag_lower
						){
							$this->parent = $this->parent->parent;
						}

						// If we don't have a match add current tag as text node
						if (strtolower($this->parent->tag) !== $tag_lower) {
							$this->parent = $org_parent; // restore origonal parent

							if ($this->parent->parent) {
								$this->parent = $this->parent->parent;
							}

							$this->parent->_[HDOM_INFO_END] = $this->cursor;
							return $this->as_text_node($tag);
						}
					} elseif (($this->parent->parent)
						&& isset($this->block_tags[$tag_lower])
					) {
						// Grandparent exists and current tag is a block tag, so our
						// parent doesn't have an end tag
						$this->parent->_[HDOM_INFO_END] = 0; // No end tag
						$org_parent = $this->parent;

						// Traverse ancestors to find a matching opening tag
						// Stop at root node
						while (($this->parent->parent)
							&& strtolower($this->parent->tag) !== $tag_lower
						) {
							$this->parent = $this->parent->parent;
						}

						// If we don't have a match add current tag as text node
						if (strtolower($this->parent->tag) !== $tag_lower) {
							$this->parent = $org_parent; // restore origonal parent
							$this->parent->_[HDOM_INFO_END] = $this->cursor;
							return $this->as_text_node($tag);
						}
					} elseif (($this->parent->parent)
						&& strtolower($this->parent->parent->tag) === $tag_lower
					) { // Grandparent exists and current tag closes it
						$this->parent->_[HDOM_INFO_END] = 0;
						$this->parent = $this->parent->parent;
					} else { // Random tag, add as text node
						return $this->as_text_node($tag);
					}
				}

				// Set end position of parent tag to current cursor position
				$this->parent->_[HDOM_INFO_END] = $this->cursor;

				if ($this->parent->parent) {
					$this->parent = $this->parent->parent;
				}

				$this->char = (++$this->pos < $this->size) ? $this->doc[$this->pos] : null; // next
				return true;
			}

			// start tag
			$node = new simple_html_dom_node($this);
			$node->_[HDOM_INFO_BEGIN] = $this->cursor;
			++$this->cursor;
			$tag = $this->copy_until($this->token_slash); // Get tag name
			$node->tag_start = $begin_tag_pos;

			// doctype, cdata & comments...
			// <!DOCTYPE html>
			// <![CDATA[ ... ]]>
			// <!-- Comment -->
			if (isset($tag[0]) && $tag[0] === '!') {
				$node->_[HDOM_INFO_TEXT] = '<' . $tag . $this->copy_until_char('>');

				if (isset($tag[2]) && $tag[1] === '-' && $tag[2] === '-') { // Comment ("<!--")
					$node->nodetype = HDOM_TYPE_COMMENT;
					$node->tag = 'comment';
				} else { // Could be doctype or CDATA but we don't care
					$node->nodetype = HDOM_TYPE_UNKNOWN;
					$node->tag = 'unknown';
				}

				if ($this->char === '>') { $node->_[HDOM_INFO_TEXT] .= '>'; }

				$this->link_nodes($node, true);
				$this->char = (++$this->pos < $this->size) ? $this->doc[$this->pos] : null; // next
				return true;
			}

			// The start tag cannot contain another start tag, if so add as text
			// i.e. "<<html>"
			if ($pos = strpos($tag, '<') !== false) {
				$tag = '<' . substr($tag, 0, -1);
				$node->_[HDOM_INFO_TEXT] = $tag;
				$this->link_nodes($node, false);
				$this->char = $this->doc[--$this->pos]; // prev
				return true;
			}

			// Handle invalid tag names (i.e. "<html#doc>")
			if (!preg_match('/^\w[\w:-]*$/', $tag)) {
				$node->_[HDOM_INFO_TEXT] = '<' . $tag . $this->copy_until('<>');

				// Next char is the beginning of a new tag, don't touch it.
				if ($this->char === '<') {
					$this->link_nodes($node, false);
					return true;
				}

				// Next char closes current tag, add and be done with it.
				if ($this->char === '>') { $node->_[HDOM_INFO_TEXT] .= '>'; }
				$this->link_nodes($node, false);
				$this->char = (++$this->pos < $this->size) ? $this->doc[$this->pos] : null; // next
				return true;
			}

			// begin tag, add new node
			$node->nodetype = HDOM_TYPE_ELEMENT;
			$tag_lower = strtolower($tag);
			$node->tag = ($this->lowercase) ? $tag_lower : $tag;

			// handle optional closing tags
			if (isset($this->optional_closing_tags[$tag_lower])) {
				// Traverse ancestors to close all optional closing tags
				while (isset($this->optional_closing_tags[$tag_lower][strtolower($this->parent->tag)])) {
					$this->parent->_[HDOM_INFO_END] = 0;
					$this->parent = $this->parent->parent;
				}
				$node->parent = $this->parent;
			}

			$guard = 0; // prevent infinity loop

			// [0] Space between tag and first attribute
			$space = array($this->copy_skip($this->token_blank), '', '');

			// attributes
			do {
				// Everything until the first equal sign should be the attribute name
				$name = $this->copy_until($this->token_equal);

				if ($name === '' && $this->char !== null && $space[0] === '') {
					break;
				}

				if ($guard === $this->pos) { // Escape infinite loop
					$this->char = (++$this->pos < $this->size) ? $this->doc[$this->pos] : null; // next
					continue;
				}

				$guard = $this->pos;

				// handle endless '<'
				// Out of bounds before the tag ended
				if ($this->pos >= $this->size - 1 && $this->char !== '>') {
					$node->nodetype = HDOM_TYPE_TEXT;
					$node->_[HDOM_INFO_END] = 0;
					$node->_[HDOM_INFO_TEXT] = '<' . $tag . $space[0] . $name;
					$node->tag = 'text';
					$this->link_nodes($node, false);
					return true;
				}

				// handle mismatch '<'
				// Attributes cannot start after opening tag
				if ($this->doc[$this->pos - 1] == '<') {
					$node->nodetype = HDOM_TYPE_TEXT;
					$node->tag = 'text';
					$node->attr = array();
					$node->_[HDOM_INFO_END] = 0;
					$node->_[HDOM_INFO_TEXT] = substr(
						$this->doc,
						$begin_tag_pos,
						$this->pos - $begin_tag_pos - 1
					);
					$this->pos -= 2;
					$this->char = (++$this->pos < $this->size) ? $this->doc[$this->pos] : null; // next
					$this->link_nodes($node, false);
					return true;
				}

				if ($name !== '/' && $name !== '') { // this is a attribute name
					// [1] Whitespace after attribute name
					$space[1] = $this->copy_skip($this->token_blank);

					$name = $this->restore_noise($name); // might be a noisy name

					if ($this->lowercase) { $name = strtolower($name); }

					if ($this->char === '=') { // attribute with value
						$this->char = (++$this->pos < $this->size) ? $this->doc[$this->pos] : null; // next
						$this->parse_attr($node, $name, $space); // get attribute value
					} else {
						//no value attr: nowrap, checked selected...
						$node->_[HDOM_INFO_QUOTE][] = HDOM_QUOTE_NO;
						$node->attr[$name] = true;
						if ($this->char != '>') { $this->char = $this->doc[--$this->pos]; } // prev
					}

					$node->_[HDOM_INFO_SPACE][] = $space;

					// prepare for next attribute
					$space = array(
						$this->copy_skip($this->token_blank),
						'',
						''
					);
				} else { // no more attributes
					break;
				}
			} while ($this->char !== '>' && $this->char !== '/'); // go until the tag ended

			$this->link_nodes($node, true);
			$node->_[HDOM_INFO_ENDSPACE] = $space[0];

			// handle empty tags (i.e. "<div/>")
			if ($this->copy_until_char('>') === '/') {
				$node->_[HDOM_INFO_ENDSPACE] .= '/';
				$node->_[HDOM_INFO_END] = 0;
			} else {
				// reset parent
				if (!isset($this->self_closing_tags[strtolower($node->tag)])) {
					$this->parent = $node;
				}
			}

			$this->char = (++$this->pos < $this->size) ? $this->doc[$this->pos] : null; // next

			// If it's a BR tag, we need to set it's text to the default text.
			// This way when we see it in plaintext, we can generate formatting that the user wants.
			// since a br tag never has sub nodes, this works well.
			if ($node->tag === 'br') {
				$node->_[HDOM_INFO_INNER] = $this->default_br_text;
			}

			return true;
		}

		protected function parse_attr($node, $name, &$space)
		{
			$is_duplicate = isset($node->attr[$name]);

			if (!$is_duplicate) // Copy whitespace between "=" and value
				$space[2] = $this->copy_skip($this->token_blank);

			switch ($this->char) {
				case '"':
					$quote_type = HDOM_QUOTE_DOUBLE;
					$this->char = (++$this->pos < $this->size) ? $this->doc[$this->pos] : null; // next
					$value = $this->copy_until_char('"');
					$this->char = (++$this->pos < $this->size) ? $this->doc[$this->pos] : null; // next
					break;
				case '\'':
					$quote_type = HDOM_QUOTE_SINGLE;
					$this->char = (++$this->pos < $this->size) ? $this->doc[$this->pos] : null; // next
					$value = $this->copy_until_char('\'');
					$this->char = (++$this->pos < $this->size) ? $this->doc[$this->pos] : null; // next
					break;
				default:
					$quote_type = HDOM_QUOTE_NO;
					$value = $this->copy_until($this->token_attr);
			}

			$value = $this->restore_noise($value);

			// PaperG: Attributes should not have \r or \n in them, that counts as
			// html whitespace.
			$value = str_replace("\r", '', $value);
			$value = str_replace("\n", '', $value);

			// PaperG: If this is a "class" selector, lets get rid of the preceeding
			// and trailing space since some people leave it in the multi class case.
			if ($name === 'class') {
				$value = trim($value);
			}

			if (!$is_duplicate) {
				$node->_[HDOM_INFO_QUOTE][] = $quote_type;
				$node->attr[$name] = $value;
			}
		}

		protected function link_nodes(&$node, $is_child)
		{
			$node->parent = $this->parent;
			$this->parent->nodes[] = $node;
			if ($is_child) {
				$this->parent->children[] = $node;
			}
		}

		protected function as_text_node($tag)
		{
			$node = new simple_html_dom_node($this);
			++$this->cursor;
			$node->_[HDOM_INFO_TEXT] = '</' . $tag . '>';
			$this->link_nodes($node, false);
			$this->char = (++$this->pos < $this->size) ? $this->doc[$this->pos] : null; // next
			return true;
		}

		protected function skip($chars)
		{
			$this->pos += strspn($this->doc, $chars, $this->pos);
			$this->char = ($this->pos < $this->size) ? $this->doc[$this->pos] : null; // next
		}

		protected function copy_skip($chars)
		{
			$pos = $this->pos;
			$len = strspn($this->doc, $chars, $pos);
			$this->pos += $len;
			$this->char = ($this->pos < $this->size) ? $this->doc[$this->pos] : null; // next
			if ($len === 0) { return ''; }
			return substr($this->doc, $pos, $len);
		}

		protected function copy_until($chars)
		{
			$pos = $this->pos;
			$len = strcspn($this->doc, $chars, $pos);
			$this->pos += $len;
			$this->char = ($this->pos < $this->size) ? $this->doc[$this->pos] : null; // next
			return substr($this->doc, $pos, $len);
		}

		protected function copy_until_char($char)
		{
			if ($this->char === null) { return ''; }

			if (($pos = strpos($this->doc, $char, $this->pos)) === false) {
				$ret = substr($this->doc, $this->pos, $this->size - $this->pos);
				$this->char = null;
				$this->pos = $this->size;
				return $ret;
			}

			if ($pos === $this->pos) { return ''; }

			$pos_old = $this->pos;
			$this->char = $this->doc[$pos];
			$this->pos = $pos;
			return substr($this->doc, $pos_old, $pos - $pos_old);
		}

		protected function remove_noise($pattern, $remove_tag = false)
		{
			global $debug_object;
			if (is_object($debug_object)) { $debug_object->debug_log_entry(1); }

			$count = preg_match_all(
				$pattern,
				$this->doc,
				$matches,
				PREG_SET_ORDER | PREG_OFFSET_CAPTURE
			);

			for ($i = $count - 1; $i > -1; --$i) {
				$key = '___noise___' . sprintf('% 5d', count($this->noise) + 1000);

				if (is_object($debug_object)) {
					$debug_object->debug_log(2, 'key is: ' . $key);
				}

				$idx = ($remove_tag) ? 0 : 1; // 0 = entire match, 1 = submatch
				$this->noise[$key] = $matches[$i][$idx][0];
				$this->doc = substr_replace($this->doc, $key, $matches[$i][$idx][1], strlen($matches[$i][$idx][0]));
			}

			// reset the length of content
			$this->size = strlen($this->doc);

			if ($this->size > 0) {
				$this->char = $this->doc[0];
			}
		}

		function restore_noise($text)
		{
			global $debug_object;
			if (is_object($debug_object)) { $debug_object->debug_log_entry(1); }

			while (($pos = strpos($text, '___noise___')) !== false) {
				// Sometimes there is a broken piece of markup, and we don't GET the
				// pos+11 etc... token which indicates a problem outside of us...

				// todo: "___noise___1000" (or any number with four or more digits)
				// in the DOM causes an infinite loop which could be utilized by
				// malicious software
				if (strlen($text) > $pos + 15) {
					$key = '___noise___'
					. $text[$pos + 11]
					. $text[$pos + 12]
					. $text[$pos + 13]
					. $text[$pos + 14]
					. $text[$pos + 15];

					if (is_object($debug_object)) {
						$debug_object->debug_log(2, 'located key of: ' . $key);
					}

					if (isset($this->noise[$key])) {
						$text = substr($text, 0, $pos)
						. $this->noise[$key]
						. substr($text, $pos + 16);
					} else {
						// do this to prevent an infinite loop.
						$text = substr($text, 0, $pos)
						. 'UNDEFINED NOISE FOR KEY: '
						. $key
						. substr($text, $pos + 16);
					}
				} else {
					// There is no valid key being given back to us... We must get
					// rid of the ___noise___ or we will have a problem.
					$text = substr($text, 0, $pos)
					. 'NO NUMERIC NOISE KEY'
					. substr($text, $pos + 11);
				}
			}
			return $text;
		}

		function search_noise($text)
		{
			global $debug_object;
			if (is_object($debug_object)) { $debug_object->debug_log_entry(1); }

			foreach($this->noise as $noiseElement) {
				if (strpos($noiseElement, $text) !== false) {
					return $noiseElement;
				}
			}
		}

		function __toString()
		{
			return $this->root->innertext();
		}

		function __get($name)
		{
			switch ($name) {
				case 'outertext':
					return $this->root->innertext();
				case 'innertext':
					return $this->root->innertext();
				case 'plaintext':
					return $this->root->text();
				case 'charset':
					return $this->_charset;
				case 'target_charset':
					return $this->_target_charset;
			}
		}

		function childNodes($idx = -1)
		{
			return $this->root->childNodes($idx);
		}

		function firstChild()
		{
			return $this->root->first_child();
		}

		function lastChild()
		{
			return $this->root->last_child();
		}

		function createElement($name, $value = null)
		{
			return @str_get_html("<$name>$value</$name>")->firstChild();
		}

		function createTextNode($value)
		{
			return @end(str_get_html($value)->nodes);
		}

		function getElementById($id)
		{
			return $this->find("#$id", 0);
		}

		function getElementsById($id, $idx = null)
		{
			return $this->find("#$id", $idx);
		}

		function getElementByTagName($name)
		{
			return $this->find($name, 0);
		}

		function getElementsByTagName($name, $idx = -1)
		{
			return $this->find($name, $idx);
		}

		function loadFile()
		{
			$args = func_get_args();
			$this->load_file($args);
		}
	}
}