[github/wallabag/wallabag.git] / inc / 3rdparty / simple_html_dom.php

<?php\r
/**\r
 * Website: http://sourceforge.net/projects/simplehtmldom/\r
 * Additional projects that may be used: http://sourceforge.net/projects/debugobject/\r
 * Acknowledge: Jose Solorzano (https://sourceforge.net/projects/php-html/)\r
 * Contributions by:\r
 *	 Yousuke Kumakura (Attribute filters)\r
 *	 Vadim Voituk (Negative indexes supports of "find" method)\r
 *	 Antcs (Constructor with automatically load contents either text or file/url)\r
 *\r
 * all affected sections have comments starting with "PaperG"\r
 *\r
 * Paperg - Added case insensitive testing of the value of the selector.\r
 * Paperg - Added tag_start for the starting index of tags - NOTE: This works but not accurately.\r
 *  This tag_start gets counted AFTER \r\n have been crushed out, and after the remove_noice calls so it will not reflect the REAL position of the tag in the source,\r
 *  it will almost always be smaller by some amount.\r
 *  We use this to determine how far into the file the tag in question is.  This "percentage will never be accurate as the $dom->size is the "real" number of bytes the dom was created from.\r
 *  but for most purposes, it's a really good estimation.\r
 * Paperg - Added the forceTagsClosed to the dom constructor.  Forcing tags closed is great for malformed html, but it CAN lead to parsing errors.\r
 * Allow the user to tell us how much they trust the html.\r
 * Paperg add the text and plaintext to the selectors for the find syntax.  plaintext implies text in the innertext of a node.  text implies that the tag is a text node.\r
 * This allows for us to find tags based on the text they contain.\r
 * Create find_ancestor_tag to see if a tag is - at any level - inside of another specific tag.\r
 * Paperg: added parse_charset so that we know about the character set of the source document.\r
 *  NOTE:  If the user's system has a routine called get_last_retrieve_url_contents_content_type availalbe, we will assume it's returning the content-type header from the\r
 *  last transfer or curl_exec, and we will parse that and use it in preference to any other method of charset detection.\r
 *\r
 * Found infinite loop in the case of broken html in restore_noise.  Rewrote to protect from that.\r
 * PaperG (John Schlick) Added get_display_size for "IMG" tags.\r
 *\r
 * Licensed under The MIT License\r
 * Redistributions of files must retain the above copyright notice.\r
 *\r
 * @author S.C. Chen <me578022@gmail.com>\r
 * @author John Schlick\r
 * @author Rus Carroll\r
 * @version 1.5 ($Rev: 210 $)\r
 * @package PlaceLocalInclude\r
 * @subpackage simple_html_dom\r
 */\r
\r
/**\r
 * All of the Defines for the classes below.\r
 * @author S.C. Chen <me578022@gmail.com>\r
 */\r
define('HDOM_TYPE_ELEMENT', 1);\r
define('HDOM_TYPE_COMMENT', 2);\r
define('HDOM_TYPE_TEXT',	3);\r
define('HDOM_TYPE_ENDTAG',  4);\r
define('HDOM_TYPE_ROOT',	5);\r
define('HDOM_TYPE_UNKNOWN', 6);\r
define('HDOM_QUOTE_DOUBLE', 0);\r
define('HDOM_QUOTE_SINGLE', 1);\r
define('HDOM_QUOTE_NO',	 3);\r
define('HDOM_INFO_BEGIN',   0);\r
define('HDOM_INFO_END',	 1);\r
define('HDOM_INFO_QUOTE',   2);\r
define('HDOM_INFO_SPACE',   3);\r
define('HDOM_INFO_TEXT',	4);\r
define('HDOM_INFO_INNER',   5);\r
define('HDOM_INFO_OUTER',   6);\r
define('HDOM_INFO_ENDSPACE',7);\r
define('DEFAULT_TARGET_CHARSET', 'UTF-8');\r
define('DEFAULT_BR_TEXT', "\r\n");\r
define('DEFAULT_SPAN_TEXT', " ");\r
define('MAX_FILE_SIZE', 600000);\r
// helper functions\r
// -----------------------------------------------------------------------------\r
// get html dom from file\r
// $maxlen is defined in the code as PHP_STREAM_COPY_ALL which is defined as -1.\r
function file_get_html($url, $use_include_path = false, $context=null, $offset = -1, $maxLen=-1, $lowercase = true, $forceTagsClosed=true, $target_charset = DEFAULT_TARGET_CHARSET, $stripRN=true, $defaultBRText=DEFAULT_BR_TEXT, $defaultSpanText=DEFAULT_SPAN_TEXT)\r
{\r
	// We DO force the tags to be terminated.\r
	$dom = new simple_html_dom(null, $lowercase, $forceTagsClosed, $target_charset, $stripRN, $defaultBRText, $defaultSpanText);\r
	// For sourceforge users: uncomment the next line and comment the retreive_url_contents line 2 lines down if it is not already done.\r
	$contents = file_get_contents($url, $use_include_path, $context, $offset);\r
	// Paperg - use our own mechanism for getting the contents as we want to control the timeout.\r
	//$contents = retrieve_url_contents($url);\r
	if (empty($contents) || strlen($contents) > MAX_FILE_SIZE)\r
	{\r
		return false;\r
	}\r
	// The second parameter can force the selectors to all be lowercase.\r
	$dom->load($contents, $lowercase, $stripRN);\r
	return $dom;\r
}\r
\r
// get html dom from string\r
function str_get_html($str, $lowercase=true, $forceTagsClosed=true, $target_charset = DEFAULT_TARGET_CHARSET, $stripRN=true, $defaultBRText=DEFAULT_BR_TEXT, $defaultSpanText=DEFAULT_SPAN_TEXT)\r
{\r
	$dom = new simple_html_dom(null, $lowercase, $forceTagsClosed, $target_charset, $stripRN, $defaultBRText, $defaultSpanText);\r
	if (empty($str) || strlen($str) > MAX_FILE_SIZE)\r
	{\r
		$dom->clear();\r
		return false;\r
	}\r
	$dom->load($str, $lowercase, $stripRN);\r
	return $dom;\r
}\r
\r
// dump html dom tree\r
function dump_html_tree($node, $show_attr=true, $deep=0)\r
{\r
	$node->dump($node);\r
}\r
\r
\r
/**\r
 * simple html dom node\r
 * PaperG - added ability for "find" routine to lowercase the value of the selector.\r
 * PaperG - added $tag_start to track the start position of the tag in the total byte index\r
 *\r
 * @package PlaceLocalInclude\r
 */\r
class simple_html_dom_node\r
{\r
	public $nodetype = HDOM_TYPE_TEXT;\r
	public $tag = 'text';\r
	public $attr = array();\r
	public $children = array();\r
	public $nodes = array();\r
	public $parent = null;\r
	// The "info" array - see HDOM_INFO_... for what each element contains.\r
	public $_ = array();\r
	public $tag_start = 0;\r
	private $dom = null;\r
\r
	function __construct($dom)\r
	{\r
		$this->dom = $dom;\r
		$dom->nodes[] = $this;\r
	}\r
\r
	function __destruct()\r
	{\r
		$this->clear();\r
	}\r
\r
	function __toString()\r
	{\r
		return $this->outertext();\r
	}\r
\r
	// clean up memory due to php5 circular references memory leak...\r
	function clear()\r
	{\r
		$this->dom = null;\r
		$this->nodes = null;\r
		$this->parent = null;\r
		$this->children = null;\r
	}\r
\r
	// dump node's tree\r
	function dump($show_attr=true, $deep=0)\r
	{\r
		$lead = str_repeat('	', $deep);\r
\r
		echo $lead.$this->tag;\r
		if ($show_attr && count($this->attr)>0)\r
		{\r
			echo '(';\r
			foreach ($this->attr as $k=>$v)\r
				echo "[$k]=>\"".$this->$k.'", ';\r
			echo ')';\r
		}\r
		echo "\n";\r
\r
		if ($this->nodes)\r
		{\r
			foreach ($this->nodes as $c)\r
			{\r
				$c->dump($show_attr, $deep+1);\r
			}\r
		}\r
	}\r
\r
\r
	// Debugging function to dump a single dom node with a bunch of information about it.\r
	function dump_node($echo=true)\r
	{\r
\r
		$string = $this->tag;\r
		if (count($this->attr)>0)\r
		{\r
			$string .= '(';\r
			foreach ($this->attr as $k=>$v)\r
			{\r
				$string .= "[$k]=>\"".$this->$k.'", ';\r
			}\r
			$string .= ')';\r
		}\r
		if (count($this->_)>0)\r
		{\r
			$string .= ' $_ (';\r
			foreach ($this->_ as $k=>$v)\r
			{\r
				if (is_array($v))\r
				{\r
					$string .= "[$k]=>(";\r
					foreach ($v as $k2=>$v2)\r
					{\r
						$string .= "[$k2]=>\"".$v2.'", ';\r
					}\r
					$string .= ")";\r
				} else {\r
					$string .= "[$k]=>\"".$v.'", ';\r
				}\r
			}\r
			$string .= ")";\r
		}\r
\r
		if (isset($this->text))\r
		{\r
			$string .= " text: (" . $this->text . ")";\r
		}\r
\r
		$string .= " HDOM_INNER_INFO: '";\r
		if (isset($node->_[HDOM_INFO_INNER]))\r
		{\r
			$string .= $node->_[HDOM_INFO_INNER] . "'";\r
		}\r
		else\r
		{\r
			$string .= ' NULL ';\r
		}\r
\r
		$string .= " children: " . count($this->children);\r
		$string .= " nodes: " . count($this->nodes);\r
		$string .= " tag_start: " . $this->tag_start;\r
		$string .= "\n";\r
\r
		if ($echo)\r
		{\r
			echo $string;\r
			return;\r
		}\r
		else\r
		{\r
			return $string;\r
		}\r
	}\r
\r
	// returns the parent of node\r
	// If a node is passed in, it will reset the parent of the current node to that one.\r
	function parent($parent=null)\r
	{\r
		// I am SURE that this doesn't work properly.\r
		// It fails to unset the current node from it's current parents nodes or children list first.\r
		if ($parent !== null)\r
		{\r
			$this->parent = $parent;\r
			$this->parent->nodes[] = $this;\r
			$this->parent->children[] = $this;\r
		}\r
\r
		return $this->parent;\r
	}\r
\r
	// verify that node has children\r
	function has_child()\r
	{\r
		return !empty($this->children);\r
	}\r
\r
	// returns children of node\r
	function children($idx=-1)\r
	{\r
		if ($idx===-1)\r
		{\r
			return $this->children;\r
		}\r
		if (isset($this->children[$idx]))\r
		{\r
			return $this->children[$idx];\r
		}\r
		return null;\r
	}\r
\r
	// returns the first child of node\r
	function first_child()\r
	{\r
		if (count($this->children)>0)\r
		{\r
			return $this->children[0];\r
		}\r
		return null;\r
	}\r
\r
	// returns the last child of node\r
	function last_child()\r
	{\r
		if (($count=count($this->children))>0)\r
		{\r
			return $this->children[$count-1];\r
		}\r
		return null;\r
	}\r
\r
	// returns the next sibling of node\r
	function next_sibling()\r
	{\r
		if ($this->parent===null)\r
		{\r
			return null;\r
		}\r
\r
		$idx = 0;\r
		$count = count($this->parent->children);\r
		while ($idx<$count && $this!==$this->parent->children[$idx])\r
		{\r
			++$idx;\r
		}\r
		if (++$idx>=$count)\r
		{\r
			return null;\r
		}\r
		return $this->parent->children[$idx];\r
	}\r
\r
	// returns the previous sibling of node\r
	function prev_sibling()\r
	{\r
		if ($this->parent===null) return null;\r
		$idx = 0;\r
		$count = count($this->parent->children);\r
		while ($idx<$count && $this!==$this->parent->children[$idx])\r
			++$idx;\r
		if (--$idx<0) return null;\r
		return $this->parent->children[$idx];\r
	}\r
\r
	// function to locate a specific ancestor tag in the path to the root.\r
	function find_ancestor_tag($tag)\r
	{\r
		global $debug_object;\r
		if (is_object($debug_object)) { $debug_object->debug_log_entry(1); }\r
\r
		// Start by including ourselves in the comparison.\r
		$returnDom = $this;\r
\r
		while (!is_null($returnDom))\r
		{\r
			if (is_object($debug_object)) { $debug_object->debug_log(2, "Current tag is: " . $returnDom->tag); }\r
\r
			if ($returnDom->tag == $tag)\r
			{\r
				break;\r
			}\r
			$returnDom = $returnDom->parent;\r
		}\r
		return $returnDom;\r
	}\r
\r
	// get dom node's inner html\r
	function innertext()\r
	{\r
		if (isset($this->_[HDOM_INFO_INNER])) return $this->_[HDOM_INFO_INNER];\r
		if (isset($this->_[HDOM_INFO_TEXT])) return $this->dom->restore_noise($this->_[HDOM_INFO_TEXT]);\r
\r
		$ret = '';\r
		foreach ($this->nodes as $n)\r
			$ret .= $n->outertext();\r
		return $ret;\r
	}\r
\r
	// get dom node's outer text (with tag)\r
	function outertext()\r
	{\r
		global $debug_object;\r
		if (is_object($debug_object))\r
		{\r
			$text = '';\r
			if ($this->tag == 'text')\r
			{\r
				if (!empty($this->text))\r
				{\r
					$text = " with text: " . $this->text;\r
				}\r
			}\r
			$debug_object->debug_log(1, 'Innertext of tag: ' . $this->tag . $text);\r
		}\r
\r
		if ($this->tag==='root') return $this->innertext();\r
\r
		// trigger callback\r
		if ($this->dom && $this->dom->callback!==null)\r
		{\r
			call_user_func_array($this->dom->callback, array($this));\r
		}\r
\r
		if (isset($this->_[HDOM_INFO_OUTER])) return $this->_[HDOM_INFO_OUTER];\r
		if (isset($this->_[HDOM_INFO_TEXT])) return $this->dom->restore_noise($this->_[HDOM_INFO_TEXT]);\r
\r
		// render begin tag\r
		if ($this->dom && $this->dom->nodes[$this->_[HDOM_INFO_BEGIN]])\r
		{\r
			$ret = $this->dom->nodes[$this->_[HDOM_INFO_BEGIN]]->makeup();\r
		} else {\r
			$ret = "";\r
		}\r
\r
		// render inner text\r
		if (isset($this->_[HDOM_INFO_INNER]))\r
		{\r
			// If it's a br tag...  don't return the HDOM_INNER_INFO that we may or may not have added.\r
			if ($this->tag != "br")\r
			{\r
				$ret .= $this->_[HDOM_INFO_INNER];\r
			}\r
		} else {\r
			if ($this->nodes)\r
			{\r
				foreach ($this->nodes as $n)\r
				{\r
					$ret .= $this->convert_text($n->outertext());\r
				}\r
			}\r
		}\r
\r
		// render end tag\r
		if (isset($this->_[HDOM_INFO_END]) && $this->_[HDOM_INFO_END]!=0)\r
			$ret .= '</'.$this->tag.'>';\r
		return $ret;\r
	}\r
\r
	// get dom node's plain text\r
	function text()\r
	{\r
		if (isset($this->_[HDOM_INFO_INNER])) return $this->_[HDOM_INFO_INNER];\r
		switch ($this->nodetype)\r
		{\r
			case HDOM_TYPE_TEXT: return $this->dom->restore_noise($this->_[HDOM_INFO_TEXT]);\r
			case HDOM_TYPE_COMMENT: return '';\r
			case HDOM_TYPE_UNKNOWN: return '';\r
		}\r
		if (strcasecmp($this->tag, 'script')===0) return '';\r
		if (strcasecmp($this->tag, 'style')===0) return '';\r
\r
		$ret = '';\r
		// In rare cases, (always node type 1 or HDOM_TYPE_ELEMENT - observed for some span tags, and some p tags) $this->nodes is set to NULL.\r
		// NOTE: This indicates that there is a problem where it's set to NULL without a clear happening.\r
		// WHY is this happening?\r
		if (!is_null($this->nodes))\r
		{\r
			foreach ($this->nodes as $n)\r
			{\r
				$ret .= $this->convert_text($n->text());\r
			}\r
\r
			// 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.\r
			if ($this->tag == "span")\r
			{\r
				$ret .= $this->dom->default_span_text;\r
			}\r
\r
\r
		}\r
		return $ret;\r
	}\r
\r
	function xmltext()\r
	{\r
		$ret = $this->innertext();\r
		$ret = str_ireplace('<![CDATA[', '', $ret);\r
		$ret = str_replace(']]>', '', $ret);\r
		return $ret;\r
	}\r
\r
	// build node's text with tag\r
	function makeup()\r
	{\r
		// text, comment, unknown\r
		if (isset($this->_[HDOM_INFO_TEXT])) return $this->dom->restore_noise($this->_[HDOM_INFO_TEXT]);\r
\r
		$ret = '<'.$this->tag;\r
		$i = -1;\r
\r
		foreach ($this->attr as $key=>$val)\r
		{\r
			++$i;\r
\r
			// skip removed attribute\r
			if ($val===null || $val===false)\r
				continue;\r
\r
			$ret .= $this->_[HDOM_INFO_SPACE][$i][0];\r
			//no value attr: nowrap, checked selected...\r
			if ($val===true)\r
				$ret .= $key;\r
			else {\r
				switch ($this->_[HDOM_INFO_QUOTE][$i])\r
				{\r
					case HDOM_QUOTE_DOUBLE: $quote = '"'; break;\r
					case HDOM_QUOTE_SINGLE: $quote = '\''; break;\r
					default: $quote = '';\r
				}\r
				$ret .= $key.$this->_[HDOM_INFO_SPACE][$i][1].'='.$this->_[HDOM_INFO_SPACE][$i][2].$quote.$val.$quote;\r
			}\r
		}\r
		$ret = $this->dom->restore_noise($ret);\r
		return $ret . $this->_[HDOM_INFO_ENDSPACE] . '>';\r
	}\r
\r
	// find elements by css selector\r
	//PaperG - added ability for find to lowercase the value of the selector.\r
	function find($selector, $idx=null, $lowercase=false)\r
	{\r
		$selectors = $this->parse_selector($selector);\r
		if (($count=count($selectors))===0) return array();\r
		$found_keys = array();\r
\r
		// find each selector\r
		for ($c=0; $c<$count; ++$c)\r
		{\r
			// The change on the below line was documented on the sourceforge code tracker id 2788009\r
			// used to be: if (($levle=count($selectors[0]))===0) return array();\r
			if (($levle=count($selectors[$c]))===0) return array();\r
			if (!isset($this->_[HDOM_INFO_BEGIN])) return array();\r
\r
			$head = array($this->_[HDOM_INFO_BEGIN]=>1);\r
\r
			// handle descendant selectors, no recursive!\r
			for ($l=0; $l<$levle; ++$l)\r
			{\r
				$ret = array();\r
				foreach ($head as $k=>$v)\r
				{\r
					$n = ($k===-1) ? $this->dom->root : $this->dom->nodes[$k];\r
					//PaperG - Pass this optional parameter on to the seek function.\r
					$n->seek($selectors[$c][$l], $ret, $lowercase);\r
				}\r
				$head = $ret;\r
			}\r
\r
			foreach ($head as $k=>$v)\r
			{\r
				if (!isset($found_keys[$k]))\r
				{\r
					$found_keys[$k] = 1;\r
				}\r
			}\r
		}\r
\r
		// sort keys\r
		ksort($found_keys);\r
\r
		$found = array();\r
		foreach ($found_keys as $k=>$v)\r
			$found[] = $this->dom->nodes[$k];\r
\r
		// return nth-element or array\r
		if (is_null($idx)) return $found;\r
		else if ($idx<0) $idx = count($found) + $idx;\r
		return (isset($found[$idx])) ? $found[$idx] : null;\r
	}\r
\r
	// seek for given conditions\r
	// PaperG - added parameter to allow for case insensitive testing of the value of a selector.\r
	protected function seek($selector, &$ret, $lowercase=false)\r
	{\r
		global $debug_object;\r
		if (is_object($debug_object)) { $debug_object->debug_log_entry(1); }\r
\r
		list($tag, $key, $val, $exp, $no_key) = $selector;\r
\r
		// xpath index\r
		if ($tag && $key && is_numeric($key))\r
		{\r
			$count = 0;\r
			foreach ($this->children as $c)\r
			{\r
				if ($tag==='*' || $tag===$c->tag) {\r
					if (++$count==$key) {\r
						$ret[$c->_[HDOM_INFO_BEGIN]] = 1;\r
						return;\r
					}\r
				}\r
			}\r
			return;\r
		}\r
\r
		$end = (!empty($this->_[HDOM_INFO_END])) ? $this->_[HDOM_INFO_END] : 0;\r
		if ($end==0) {\r
			$parent = $this->parent;\r
			while (!isset($parent->_[HDOM_INFO_END]) && $parent!==null) {\r
				$end -= 1;\r
				$parent = $parent->parent;\r
			}\r
			$end += $parent->_[HDOM_INFO_END];\r
		}\r
\r
		for ($i=$this->_[HDOM_INFO_BEGIN]+1; $i<$end; ++$i) {\r
			$node = $this->dom->nodes[$i];\r
\r
			$pass = true;\r
\r
			if ($tag==='*' && !$key) {\r
				if (in_array($node, $this->children, true))\r
					$ret[$i] = 1;\r
				continue;\r
			}\r
\r
			// compare tag\r
			if ($tag && $tag!=$node->tag && $tag!=='*') {$pass=false;}\r
			// compare key\r
			if ($pass && $key) {\r
				if ($no_key) {\r
					if (isset($node->attr[$key])) $pass=false;\r
				} else {\r
					if (($key != "plaintext") && !isset($node->attr[$key])) $pass=false;\r
				}\r
			}\r
			// compare value\r
			if ($pass && $key && $val  && $val!=='*') {\r
				// If they have told us that this is a "plaintext" search then we want the plaintext of the node - right?\r
				if ($key == "plaintext") {\r
					// $node->plaintext actually returns $node->text();\r
					$nodeKeyValue = $node->text();\r
				} else {\r
					// this is a normal search, we want the value of that attribute of the tag.\r
					$nodeKeyValue = $node->attr[$key];\r
				}\r
				if (is_object($debug_object)) {$debug_object->debug_log(2, "testing node: " . $node->tag . " for attribute: " . $key . $exp . $val . " where nodes value is: " . $nodeKeyValue);}\r
\r
				//PaperG - If lowercase is set, do a case insensitive test of the value of the selector.\r
				if ($lowercase) {\r
					$check = $this->match($exp, strtolower($val), strtolower($nodeKeyValue));\r
				} else {\r
					$check = $this->match($exp, $val, $nodeKeyValue);\r
				}\r
				if (is_object($debug_object)) {$debug_object->debug_log(2, "after match: " . ($check ? "true" : "false"));}\r
\r
				// handle multiple class\r
				if (!$check && strcasecmp($key, 'class')===0) {\r
					foreach (explode(' ',$node->attr[$key]) as $k) {\r
						// Without this, there were cases where leading, trailing, or double spaces lead to our comparing blanks - bad form.\r
						if (!empty($k)) {\r
							if ($lowercase) {\r
								$check = $this->match($exp, strtolower($val), strtolower($k));\r
							} else {\r
								$check = $this->match($exp, $val, $k);\r
							}\r
							if ($check) break;\r
						}\r
					}\r
				}\r
				if (!$check) $pass = false;\r
			}\r
			if ($pass) $ret[$i] = 1;\r
			unset($node);\r
		}\r
		// It's passed by reference so this is actually what this function returns.\r
		if (is_object($debug_object)) {$debug_object->debug_log(1, "EXIT - ret: ", $ret);}\r
	}\r
\r
	protected function match($exp, $pattern, $value) {\r
		global $debug_object;\r
		if (is_object($debug_object)) {$debug_object->debug_log_entry(1);}\r
\r
		switch ($exp) {\r
			case '=':\r
				return ($value===$pattern);\r
			case '!=':\r
				return ($value!==$pattern);\r
			case '^=':\r
				return preg_match("/^".preg_quote($pattern,'/')."/", $value);\r
			case '$=':\r
				return preg_match("/".preg_quote($pattern,'/')."$/", $value);\r
			case '*=':\r
				if ($pattern[0]=='/') {\r
					return preg_match($pattern, $value);\r
				}\r
				return preg_match("/".$pattern."/i", $value);\r
		}\r
		return false;\r
	}\r
\r
	protected function parse_selector($selector_string) {\r
		global $debug_object;\r
		if (is_object($debug_object)) {$debug_object->debug_log_entry(1);}\r
\r
		// pattern of CSS selectors, modified from mootools\r
		// Paperg: Add the colon to the attrbute, so that it properly finds <tag attr:ibute="something" > like google does.\r
		// Note: if you try to look at this attribute, yo MUST use getAttribute since $dom->x:y will fail the php syntax check.\r
// Notice the \[ starting the attbute?  and the @? following?  This implies that an attribute can begin with an @ sign that is not captured.\r
// This implies that an html attribute specifier may start with an @ sign that is NOT captured by the expression.\r
// farther study is required to determine of this should be documented or removed.\r
//		$pattern = "/([\w-:\*]*)(?:\#([\w-]+)|\.([\w-]+))?(?:\[@?(!?[\w-]+)(?:([!*^$]?=)[\"']?(.*?)[\"']?)?\])?([\/, ]+)/is";\r
		$pattern = "/([\w-:\*]*)(?:\#([\w-]+)|\.([\w-]+))?(?:\[@?(!?[\w-:]+)(?:([!*^$]?=)[\"']?(.*?)[\"']?)?\])?([\/, ]+)/is";\r
		preg_match_all($pattern, trim($selector_string).' ', $matches, PREG_SET_ORDER);\r
		if (is_object($debug_object)) {$debug_object->debug_log(2, "Matches Array: ", $matches);}\r
\r
		$selectors = array();\r
		$result = array();\r
		//print_r($matches);\r
\r
		foreach ($matches as $m) {\r
			$m[0] = trim($m[0]);\r
			if ($m[0]==='' || $m[0]==='/' || $m[0]==='//') continue;\r
			// for browser generated xpath\r
			if ($m[1]==='tbody') continue;\r
\r
			list($tag, $key, $val, $exp, $no_key) = array($m[1], null, null, '=', false);\r
			if (!empty($m[2])) {$key='id'; $val=$m[2];}\r
			if (!empty($m[3])) {$key='class'; $val=$m[3];}\r
			if (!empty($m[4])) {$key=$m[4];}\r
			if (!empty($m[5])) {$exp=$m[5];}\r
			if (!empty($m[6])) {$val=$m[6];}\r
\r
			// convert to lowercase\r
			if ($this->dom->lowercase) {$tag=strtolower($tag); $key=strtolower($key);}\r
			//elements that do NOT have the specified attribute\r
			if (isset($key[0]) && $key[0]==='!') {$key=substr($key, 1); $no_key=true;}\r
\r
			$result[] = array($tag, $key, $val, $exp, $no_key);\r
			if (trim($m[7])===',') {\r
				$selectors[] = $result;\r
				$result = array();\r
			}\r
		}\r
		if (count($result)>0)\r
			$selectors[] = $result;\r
		return $selectors;\r
	}\r
\r
	function __get($name)\r
	{\r
		if (isset($this->attr[$name]))\r
		{\r
			return $this->convert_text($this->attr[$name]);\r
		}\r
		switch ($name)\r
		{\r
			case 'outertext': return $this->outertext();\r
			case 'innertext': return $this->innertext();\r
			case 'plaintext': return $this->text();\r
			case 'xmltext': return $this->xmltext();\r
			default: return array_key_exists($name, $this->attr);\r
		}\r
	}\r
\r
	function __set($name, $value)\r
	{\r
		global $debug_object;\r
		if (is_object($debug_object)) {$debug_object->debug_log_entry(1);}\r
\r
		switch ($name)\r
		{\r
			case 'outertext': return $this->_[HDOM_INFO_OUTER] = $value;\r
			case 'innertext':\r
				if (isset($this->_[HDOM_INFO_TEXT])) return $this->_[HDOM_INFO_TEXT] = $value;\r
				return $this->_[HDOM_INFO_INNER] = $value;\r
		}\r
		if (!isset($this->attr[$name]))\r
		{\r
			$this->_[HDOM_INFO_SPACE][] = array(' ', '', '');\r
			$this->_[HDOM_INFO_QUOTE][] = HDOM_QUOTE_DOUBLE;\r
		}\r
		$this->attr[$name] = $value;\r
	}\r
\r
	function __isset($name)\r
	{\r
		switch ($name)\r
		{\r
			case 'outertext': return true;\r
			case 'innertext': return true;\r
			case 'plaintext': return true;\r
		}\r
		//no value attr: nowrap, checked selected...\r
		return (array_key_exists($name, $this->attr)) ? true : isset($this->attr[$name]);\r
	}\r
\r
	function __unset($name) {\r
		if (isset($this->attr[$name]))\r
			unset($this->attr[$name]);\r
	}\r
\r
	// PaperG - Function to convert the text from one character set to another if the two sets are not the same.\r
	function convert_text($text)\r
	{\r
		global $debug_object;\r
		if (is_object($debug_object)) {$debug_object->debug_log_entry(1);}\r
\r
		$converted_text = $text;\r
\r
		$sourceCharset = "";\r
		$targetCharset = "";\r
\r
		if ($this->dom)\r
		{\r
			$sourceCharset = strtoupper($this->dom->_charset);\r
			$targetCharset = strtoupper($this->dom->_target_charset);\r
		}\r
		if (is_object($debug_object)) {$debug_object->debug_log(3, "source charset: " . $sourceCharset . " target charaset: " . $targetCharset);}\r
\r
		if (!empty($sourceCharset) && !empty($targetCharset) && (strcasecmp($sourceCharset, $targetCharset) != 0))\r
		{\r
			// Check if the reported encoding could have been incorrect and the text is actually already UTF-8\r
			if ((strcasecmp($targetCharset, 'UTF-8') == 0) && ($this->is_utf8($text)))\r
			{\r
				$converted_text = $text;\r
			}\r
			else\r
			{\r
				$converted_text = iconv($sourceCharset, $targetCharset, $text);\r
			}\r
		}\r
\r
		// Lets make sure that we don't have that silly BOM issue with any of the utf-8 text we output.\r
		if ($targetCharset == 'UTF-8')\r
		{\r
			if (substr($converted_text, 0, 3) == "\xef\xbb\xbf")\r
			{\r
				$converted_text = substr($converted_text, 3);\r
			}\r
			if (substr($converted_text, -3) == "\xef\xbb\xbf")\r
			{\r
				$converted_text = substr($converted_text, 0, -3);\r
			}\r
		}\r
\r
		return $converted_text;\r
	}\r
\r
	/**\r
	* Returns true if $string is valid UTF-8 and false otherwise.\r
	*\r
	* @param mixed $str String to be tested\r
	* @return boolean\r
	*/\r
	static function is_utf8($str)\r
	{\r
		$c=0; $b=0;\r
		$bits=0;\r
		$len=strlen($str);\r
		for($i=0; $i<$len; $i++)\r
		{\r
			$c=ord($str[$i]);\r
			if($c > 128)\r
			{\r
				if(($c >= 254)) return false;\r
				elseif($c >= 252) $bits=6;\r
				elseif($c >= 248) $bits=5;\r
				elseif($c >= 240) $bits=4;\r
				elseif($c >= 224) $bits=3;\r
				elseif($c >= 192) $bits=2;\r
				else return false;\r
				if(($i+$bits) > $len) return false;\r
				while($bits > 1)\r
				{\r
					$i++;\r
					$b=ord($str[$i]);\r
					if($b < 128 || $b > 191) return false;\r
					$bits--;\r
				}\r
			}\r
		}\r
		return true;\r
	}\r
	/*\r
	function is_utf8($string)\r
	{\r
		//this is buggy\r
		return (utf8_encode(utf8_decode($string)) == $string);\r
	}\r
	*/\r
\r
	/**\r
	 * Function to try a few tricks to determine the displayed size of an img on the page.\r
	 * NOTE: This will ONLY work on an IMG tag. Returns FALSE on all other tag types.\r
	 *\r
	 * @author John Schlick\r
	 * @version April 19 2012\r
	 * @return array an array containing the 'height' and 'width' of the image on the page or -1 if we can't figure it out.\r
	 */\r
	function get_display_size()\r
	{\r
		global $debug_object;\r
\r
		$width = -1;\r
		$height = -1;\r
\r
		if ($this->tag !== 'img')\r
		{\r
			return false;\r
		}\r
\r
		// See if there is aheight or width attribute in the tag itself.\r
		if (isset($this->attr['width']))\r
		{\r
			$width = $this->attr['width'];\r
		}\r
\r
		if (isset($this->attr['height']))\r
		{\r
			$height = $this->attr['height'];\r
		}\r
\r
		// Now look for an inline style.\r
		if (isset($this->attr['style']))\r
		{\r
			// Thanks to user gnarf from stackoverflow for this regular expression.\r
			$attributes = array();\r
			preg_match_all("/([\w-]+)\s*:\s*([^;]+)\s*;?/", $this->attr['style'], $matches, PREG_SET_ORDER);\r
			foreach ($matches as $match) {\r
			  $attributes[$match[1]] = $match[2];\r
			}\r
\r
			// If there is a width in the style attributes:\r
			if (isset($attributes['width']) && $width == -1)\r
			{\r
				// check that the last two characters are px (pixels)\r
				if (strtolower(substr($attributes['width'], -2)) == 'px')\r
				{\r
					$proposed_width = substr($attributes['width'], 0, -2);\r
					// Now make sure that it's an integer and not something stupid.\r
					if (filter_var($proposed_width, FILTER_VALIDATE_INT))\r
					{\r
						$width = $proposed_width;\r
					}\r
				}\r
			}\r
\r
			// If there is a width in the style attributes:\r
			if (isset($attributes['height']) && $height == -1)\r
			{\r
				// check that the last two characters are px (pixels)\r
				if (strtolower(substr($attributes['height'], -2)) == 'px')\r
				{\r
					$proposed_height = substr($attributes['height'], 0, -2);\r
					// Now make sure that it's an integer and not something stupid.\r
					if (filter_var($proposed_height, FILTER_VALIDATE_INT))\r
					{\r
						$height = $proposed_height;\r
					}\r
				}\r
			}\r
\r
		}\r
\r
		// Future enhancement:\r
		// Look in the tag to see if there is a class or id specified that has a height or width attribute to it.\r
\r
		// Far future enhancement\r
		// 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\r
		// Note that in this case, the class or id will have the img subselector for it to apply to the image.\r
\r
		// ridiculously far future development\r
		// 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.\r
\r
		$result = array('height' => $height,\r
						'width' => $width);\r
		return $result;\r
	}\r
\r
	// camel naming conventions\r
	function getAllAttributes() {return $this->attr;}\r
	function getAttribute($name) {return $this->__get($name);}\r
	function setAttribute($name, $value) {$this->__set($name, $value);}\r
	function hasAttribute($name) {return $this->__isset($name);}\r
	function removeAttribute($name) {$this->__set($name, null);}\r
	function getElementById($id) {return $this->find("#$id", 0);}\r
	function getElementsById($id, $idx=null) {return $this->find("#$id", $idx);}\r
	function getElementByTagName($name) {return $this->find($name, 0);}\r
	function getElementsByTagName($name, $idx=null) {return $this->find($name, $idx);}\r
	function parentNode() {return $this->parent();}\r
	function childNodes($idx=-1) {return $this->children($idx);}\r
	function firstChild() {return $this->first_child();}\r
	function lastChild() {return $this->last_child();}\r
	function nextSibling() {return $this->next_sibling();}\r
	function previousSibling() {return $this->prev_sibling();}\r
	function hasChildNodes() {return $this->has_child();}\r
	function nodeName() {return $this->tag;}\r
	function appendChild($node) {$node->parent($this); return $node;}\r
\r
}\r
\r
/**\r
 * simple html dom parser\r
 * Paperg - in the find routine: allow us to specify that we want case insensitive testing of the value of the selector.\r
 * Paperg - change $size from protected to public so we can easily access it\r
 * Paperg - added ForceTagsClosed in the constructor which tells us whether we trust the html or not.  Default is to NOT trust it.\r
 *\r
 * @package PlaceLocalInclude\r
 */\r
class simple_html_dom\r
{\r
	public $root = null;\r
	public $nodes = array();\r
	public $callback = null;\r
	public $lowercase = false;\r
	// Used to keep track of how large the text was when we started.\r
	public $original_size;\r
	public $size;\r
	protected $pos;\r
	protected $doc;\r
	protected $char;\r
	protected $cursor;\r
	protected $parent;\r
	protected $noise = array();\r
	protected $token_blank = " \t\r\n";\r
	protected $token_equal = ' =/>';\r
	protected $token_slash = " />\r\n\t";\r
	protected $token_attr = ' >';\r
	// Note that this is referenced by a child node, and so it needs to be public for that node to see this information.\r
	public $_charset = '';\r
	public $_target_charset = '';\r
	protected $default_br_text = "";\r
	public $default_span_text = "";\r
\r
	// use isset instead of in_array, performance boost about 30%...\r
	protected $self_closing_tags = array('img'=>1, 'br'=>1, 'input'=>1, 'meta'=>1, 'link'=>1, 'hr'=>1, 'base'=>1, 'embed'=>1, 'spacer'=>1);\r
	protected $block_tags = array('root'=>1, 'body'=>1, 'form'=>1, 'div'=>1, 'span'=>1, 'table'=>1);\r
	// Known sourceforge issue #2977341\r
	// B tags that are not closed cause us to return everything to the end of the document.\r
	protected $optional_closing_tags = array(\r
		'tr'=>array('tr'=>1, 'td'=>1, 'th'=>1),\r
		'th'=>array('th'=>1),\r
		'td'=>array('td'=>1),\r
		'li'=>array('li'=>1),\r
		'dt'=>array('dt'=>1, 'dd'=>1),\r
		'dd'=>array('dd'=>1, 'dt'=>1),\r
		'dl'=>array('dd'=>1, 'dt'=>1),\r
		'p'=>array('p'=>1),\r
		'nobr'=>array('nobr'=>1),\r
		'b'=>array('b'=>1),\r
		'option'=>array('option'=>1),\r
	);\r
\r
	function __construct($str=null, $lowercase=true, $forceTagsClosed=true, $target_charset=DEFAULT_TARGET_CHARSET, $stripRN=true, $defaultBRText=DEFAULT_BR_TEXT, $defaultSpanText=DEFAULT_SPAN_TEXT)\r
	{\r
		if ($str)\r
		{\r
			if (preg_match("/^http:\/\//i",$str) || is_file($str))\r
			{\r
				$this->load_file($str);\r
			}\r
			else\r
			{\r
				$this->load($str, $lowercase, $stripRN, $defaultBRText, $defaultSpanText);\r
			}\r
		}\r
		// Forcing tags to be closed implies that we don't trust the html, but it can lead to parsing errors if we SHOULD trust the html.\r
		if (!$forceTagsClosed) {\r
			$this->optional_closing_array=array();\r
		}\r
		$this->_target_charset = $target_charset;\r
	}\r
\r
	function __destruct()\r
	{\r
		$this->clear();\r
	}\r
\r
	// load html from string\r
	function load($str, $lowercase=true, $stripRN=true, $defaultBRText=DEFAULT_BR_TEXT, $defaultSpanText=DEFAULT_SPAN_TEXT)\r
	{\r
		global $debug_object;\r
\r
		// prepare\r
		$this->prepare($str, $lowercase, $stripRN, $defaultBRText, $defaultSpanText);\r
		// strip out cdata\r
		$this->remove_noise("'<!\[CDATA\[(.*?)\]\]>'is", true);\r
		// strip out comments\r
		$this->remove_noise("'<!--(.*?)-->'is");\r
		// Per sourceforge http://sourceforge.net/tracker/?func=detail&aid=2949097&group_id=218559&atid=1044037\r
		// Script tags removal now preceeds style tag removal.\r
		// strip out <script> tags\r
		$this->remove_noise("'<\s*script[^>]*[^/]>(.*?)<\s*/\s*script\s*>'is");\r
		$this->remove_noise("'<\s*script\s*>(.*?)<\s*/\s*script\s*>'is");\r
		// strip out <style> tags\r
		$this->remove_noise("'<\s*style[^>]*[^/]>(.*?)<\s*/\s*style\s*>'is");\r
		$this->remove_noise("'<\s*style\s*>(.*?)<\s*/\s*style\s*>'is");\r
		// strip out preformatted tags\r
		$this->remove_noise("'<\s*(?:code)[^>]*>(.*?)<\s*/\s*(?:code)\s*>'is");\r
		// strip out server side scripts\r
		$this->remove_noise("'(<\?)(.*?)(\?>)'s", true);\r
		// strip smarty scripts\r
		$this->remove_noise("'(\{\w)(.*?)(\})'s", true);\r
\r
		// parsing\r
		while ($this->parse());\r
		// end\r
		$this->root->_[HDOM_INFO_END] = $this->cursor;\r
		$this->parse_charset();\r
\r
		// make load function chainable\r
		return $this;\r
\r
	}\r
\r
	// load html from file\r
	function load_file()\r
	{\r
	  //external error: NOT related to dom loading\r
	  $extError=error_get_last();\r
\r
		$args = func_get_args();\r
		$this->load(call_user_func_array('file_get_contents', $args), true);\r
\r
		// Throw an error if we can't properly load the dom.\r
		$error=error_get_last();\r
		if ($error!==$extError) {\r
			$this->clear();\r
			return false;\r
		}\r
	}\r
\r
	// set callback function\r
	function set_callback($function_name)\r
	{\r
		$this->callback = $function_name;\r
	}\r
\r
	// remove callback function\r
	function remove_callback()\r
	{\r
		$this->callback = null;\r
	}\r
\r
	// save dom as string\r
	function save($filepath='')\r
	{\r
		$ret = $this->root->innertext();\r
		if ($filepath!=='') file_put_contents($filepath, $ret, LOCK_EX);\r
		return $ret;\r
	}\r
\r
	// find dom node by css selector\r
	// Paperg - allow us to specify that we want case insensitive testing of the value of the selector.\r
	function find($selector, $idx=null, $lowercase=false)\r
	{\r
		return $this->root->find($selector, $idx, $lowercase);\r
	}\r
\r
	// clean up memory due to php5 circular references memory leak...\r
	function clear()\r
	{\r
		foreach ($this->nodes as $n) {$n->clear(); $n = null;}\r
		// This add next line is documented in the sourceforge repository. 2977248 as a fix for ongoing memory leaks that occur even with the use of clear.\r
		if (isset($this->children)) foreach ($this->children as $n) {$n->clear(); $n = null;}\r
		if (isset($this->parent)) {$this->parent->clear(); unset($this->parent);}\r
		if (isset($this->root)) {$this->root->clear(); unset($this->root);}\r
		unset($this->doc);\r
		unset($this->noise);\r
	}\r
\r
	function dump($show_attr=true)\r
	{\r
		$this->root->dump($show_attr);\r
	}\r
\r
	// prepare HTML data and init everything\r
	protected function prepare($str, $lowercase=true, $stripRN=true, $defaultBRText=DEFAULT_BR_TEXT, $defaultSpanText=DEFAULT_SPAN_TEXT)\r
	{\r
		$this->clear();\r
\r
		// set the length of content before we do anything to it.\r
		$this->size = strlen($str);\r
		// Save the original size of the html that we got in.  It might be useful to someone.\r
		$this->original_size = $this->size;\r
\r
		//before we save the string as the doc...  strip out the \r \n's if we are told to.\r
		if ($stripRN) {\r
			$str = str_replace("\r", " ", $str);\r
			$str = str_replace("\n", " ", $str);\r
\r
			// set the length of content since we have changed it.\r
			$this->size = strlen($str);\r
		}\r
\r
		$this->doc = $str;\r
		$this->pos = 0;\r
		$this->cursor = 1;\r
		$this->noise = array();\r
		$this->nodes = array();\r
		$this->lowercase = $lowercase;\r
		$this->default_br_text = $defaultBRText;\r
		$this->default_span_text = $defaultSpanText;\r
		$this->root = new simple_html_dom_node($this);\r
		$this->root->tag = 'root';\r
		$this->root->_[HDOM_INFO_BEGIN] = -1;\r
		$this->root->nodetype = HDOM_TYPE_ROOT;\r
		$this->parent = $this->root;\r
		if ($this->size>0) $this->char = $this->doc[0];\r
	}\r
\r
	// parse html content\r
	protected function parse()\r
	{\r
		if (($s = $this->copy_until_char('<'))==='')\r
		{\r
			return $this->read_tag();\r
		}\r
\r
		// text\r
		$node = new simple_html_dom_node($this);\r
		++$this->cursor;\r
		$node->_[HDOM_INFO_TEXT] = $s;\r
		$this->link_nodes($node, false);\r
		return true;\r
	}\r
\r
	// PAPERG - dkchou - added this to try to identify the character set of the page we have just parsed so we know better how to spit it out later.\r
	// NOTE:  IF you provide a routine called get_last_retrieve_url_contents_content_type which returns the CURLINFO_CONTENT_TYPE from the last curl_exec\r
	// (or the content_type header from the last transfer), we will parse THAT, and if a charset is specified, we will use it over any other mechanism.\r
	protected function parse_charset()\r
	{\r
		global $debug_object;\r
\r
		$charset = null;\r
\r
		if (function_exists('get_last_retrieve_url_contents_content_type'))\r
		{\r
			$contentTypeHeader = get_last_retrieve_url_contents_content_type();\r
			$success = preg_match('/charset=(.+)/', $contentTypeHeader, $matches);\r
			if ($success)\r
			{\r
				$charset = $matches[1];\r
				if (is_object($debug_object)) {$debug_object->debug_log(2, 'header content-type found charset of: ' . $charset);}\r
			}\r
\r
		}\r
\r
		if (empty($charset))\r
		{\r
			$el = $this->root->find('meta[http-equiv=Content-Type]',0, true);\r
			if (!empty($el))\r
			{\r
				$fullvalue = $el->content;\r
				if (is_object($debug_object)) {$debug_object->debug_log(2, 'meta content-type tag found' . $fullvalue);}\r
\r
				if (!empty($fullvalue))\r
				{\r
					$success = preg_match('/charset=(.+)/i', $fullvalue, $matches);\r
					if ($success)\r
					{\r
						$charset = $matches[1];\r
					}\r
					else\r
					{\r
						// If there is a meta tag, and they don't specify the character set, research says that it's typically ISO-8859-1\r
						if (is_object($debug_object)) {$debug_object->debug_log(2, 'meta content-type tag couldn\'t be parsed. using iso-8859 default.');}\r
						$charset = 'ISO-8859-1';\r
					}\r
				}\r
			}\r
		}\r
\r
		// If we couldn't find a charset above, then lets try to detect one based on the text we got...\r
		if (empty($charset))\r
		{\r
			// Use this in case mb_detect_charset isn't installed/loaded on this machine.\r
			$charset = false;\r
			if (function_exists('mb_detect_encoding'))\r
			{\r
				// Have php try to detect the encoding from the text given to us.\r
				$charset = mb_detect_encoding($this->root->plaintext . "ascii", $encoding_list = array( "UTF-8", "CP1252" ) );\r
				if (is_object($debug_object)) {$debug_object->debug_log(2, 'mb_detect found: ' . $charset);}\r
			}\r
\r
			// and if this doesn't work...  then we need to just wrongheadedly assume it's UTF-8 so that we can move on - cause this will usually give us most of what we need...\r
			if ($charset === false)\r
			{\r
				if (is_object($debug_object)) {$debug_object->debug_log(2, 'since mb_detect failed - using default of utf-8');}\r
				$charset = 'UTF-8';\r
			}\r
		}\r
\r
		// Since CP1252 is a superset, if we get one of it's subsets, we want it instead.\r
		if ((strtolower($charset) == strtolower('ISO-8859-1')) || (strtolower($charset) == strtolower('Latin1')) || (strtolower($charset) == strtolower('Latin-1')))\r
		{\r
			if (is_object($debug_object)) {$debug_object->debug_log(2, 'replacing ' . $charset . ' with CP1252 as its a superset');}\r
			$charset = 'CP1252';\r
		}\r
\r
		if (is_object($debug_object)) {$debug_object->debug_log(1, 'EXIT - ' . $charset);}\r
\r
		return $this->_charset = $charset;\r
	}\r
\r
	// read tag info\r
	protected function read_tag()\r
	{\r
		if ($this->char!=='<')\r
		{\r
			$this->root->_[HDOM_INFO_END] = $this->cursor;\r
			return false;\r
		}\r
		$begin_tag_pos = $this->pos;\r
		$this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next\r
\r
		// end tag\r
		if ($this->char==='/')\r
		{\r
			$this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next\r
			// This represents the change in the simple_html_dom trunk from revision 180 to 181.\r
			// $this->skip($this->token_blank_t);\r
			$this->skip($this->token_blank);\r
			$tag = $this->copy_until_char('>');\r
\r
			// skip attributes in end tag\r
			if (($pos = strpos($tag, ' '))!==false)\r
				$tag = substr($tag, 0, $pos);\r
\r
			$parent_lower = strtolower($this->parent->tag);\r
			$tag_lower = strtolower($tag);\r
\r
			if ($parent_lower!==$tag_lower)\r
			{\r
				if (isset($this->optional_closing_tags[$parent_lower]) && isset($this->block_tags[$tag_lower]))\r
				{\r
					$this->parent->_[HDOM_INFO_END] = 0;\r
					$org_parent = $this->parent;\r
\r
					while (($this->parent->parent) && strtolower($this->parent->tag)!==$tag_lower)\r
						$this->parent = $this->parent->parent;\r
\r
					if (strtolower($this->parent->tag)!==$tag_lower) {\r
						$this->parent = $org_parent; // restore origonal parent\r
						if ($this->parent->parent) $this->parent = $this->parent->parent;\r
						$this->parent->_[HDOM_INFO_END] = $this->cursor;\r
						return $this->as_text_node($tag);\r
					}\r
				}\r
				else if (($this->parent->parent) && isset($this->block_tags[$tag_lower]))\r
				{\r
					$this->parent->_[HDOM_INFO_END] = 0;\r
					$org_parent = $this->parent;\r
\r
					while (($this->parent->parent) && strtolower($this->parent->tag)!==$tag_lower)\r
						$this->parent = $this->parent->parent;\r
\r
					if (strtolower($this->parent->tag)!==$tag_lower)\r
					{\r
						$this->parent = $org_parent; // restore origonal parent\r
						$this->parent->_[HDOM_INFO_END] = $this->cursor;\r
						return $this->as_text_node($tag);\r
					}\r
				}\r
				else if (($this->parent->parent) && strtolower($this->parent->parent->tag)===$tag_lower)\r
				{\r
					$this->parent->_[HDOM_INFO_END] = 0;\r
					$this->parent = $this->parent->parent;\r
				}\r
				else\r
					return $this->as_text_node($tag);\r
			}\r
\r
			$this->parent->_[HDOM_INFO_END] = $this->cursor;\r
			if ($this->parent->parent) $this->parent = $this->parent->parent;\r
\r
			$this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next\r
			return true;\r
		}\r
\r
		$node = new simple_html_dom_node($this);\r
		$node->_[HDOM_INFO_BEGIN] = $this->cursor;\r
		++$this->cursor;\r
		$tag = $this->copy_until($this->token_slash);\r
		$node->tag_start = $begin_tag_pos;\r
\r
		// doctype, cdata & comments...\r
		if (isset($tag[0]) && $tag[0]==='!') {\r
			$node->_[HDOM_INFO_TEXT] = '<' . $tag . $this->copy_until_char('>');\r
\r
			if (isset($tag[2]) && $tag[1]==='-' && $tag[2]==='-') {\r
				$node->nodetype = HDOM_TYPE_COMMENT;\r
				$node->tag = 'comment';\r
			} else {\r
				$node->nodetype = HDOM_TYPE_UNKNOWN;\r
				$node->tag = 'unknown';\r
			}\r
			if ($this->char==='>') $node->_[HDOM_INFO_TEXT].='>';\r
			$this->link_nodes($node, true);\r
			$this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next\r
			return true;\r
		}\r
\r
		// text\r
		if ($pos=strpos($tag, '<')!==false) {\r
			$tag = '<' . substr($tag, 0, -1);\r
			$node->_[HDOM_INFO_TEXT] = $tag;\r
			$this->link_nodes($node, false);\r
			$this->char = $this->doc[--$this->pos]; // prev\r
			return true;\r
		}\r
\r
		if (!preg_match("/^[\w-:]+$/", $tag)) {\r
			$node->_[HDOM_INFO_TEXT] = '<' . $tag . $this->copy_until('<>');\r
			if ($this->char==='<') {\r
				$this->link_nodes($node, false);\r
				return true;\r
			}\r
\r
			if ($this->char==='>') $node->_[HDOM_INFO_TEXT].='>';\r
			$this->link_nodes($node, false);\r
			$this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next\r
			return true;\r
		}\r
\r
		// begin tag\r
		$node->nodetype = HDOM_TYPE_ELEMENT;\r
		$tag_lower = strtolower($tag);\r
		$node->tag = ($this->lowercase) ? $tag_lower : $tag;\r
\r
		// handle optional closing tags\r
		if (isset($this->optional_closing_tags[$tag_lower]) )\r
		{\r
			while (isset($this->optional_closing_tags[$tag_lower][strtolower($this->parent->tag)]))\r
			{\r
				$this->parent->_[HDOM_INFO_END] = 0;\r
				$this->parent = $this->parent->parent;\r
			}\r
			$node->parent = $this->parent;\r
		}\r
\r
		$guard = 0; // prevent infinity loop\r
		$space = array($this->copy_skip($this->token_blank), '', '');\r
\r
		// attributes\r
		do\r
		{\r
			if ($this->char!==null && $space[0]==='')\r
			{\r
				break;\r
			}\r
			$name = $this->copy_until($this->token_equal);\r
			if ($guard===$this->pos)\r
			{\r
				$this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next\r
				continue;\r
			}\r
			$guard = $this->pos;\r
\r
			// handle endless '<'\r
			if ($this->pos>=$this->size-1 && $this->char!=='>') {\r
				$node->nodetype = HDOM_TYPE_TEXT;\r
				$node->_[HDOM_INFO_END] = 0;\r
				$node->_[HDOM_INFO_TEXT] = '<'.$tag . $space[0] . $name;\r
				$node->tag = 'text';\r
				$this->link_nodes($node, false);\r
				return true;\r
			}\r
\r
			// handle mismatch '<'\r
			if ($this->doc[$this->pos-1]=='<') {\r
				$node->nodetype = HDOM_TYPE_TEXT;\r
				$node->tag = 'text';\r
				$node->attr = array();\r
				$node->_[HDOM_INFO_END] = 0;\r
				$node->_[HDOM_INFO_TEXT] = substr($this->doc, $begin_tag_pos, $this->pos-$begin_tag_pos-1);\r
				$this->pos -= 2;\r
				$this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next\r
				$this->link_nodes($node, false);\r
				return true;\r
			}\r
\r
			if ($name!=='/' && $name!=='') {\r
				$space[1] = $this->copy_skip($this->token_blank);\r
				$name = $this->restore_noise($name);\r
				if ($this->lowercase) $name = strtolower($name);\r
				if ($this->char==='=') {\r
					$this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next\r
					$this->parse_attr($node, $name, $space);\r
				}\r
				else {\r
					//no value attr: nowrap, checked selected...\r
					$node->_[HDOM_INFO_QUOTE][] = HDOM_QUOTE_NO;\r
					$node->attr[$name] = true;\r
					if ($this->char!='>') $this->char = $this->doc[--$this->pos]; // prev\r
				}\r
				$node->_[HDOM_INFO_SPACE][] = $space;\r
				$space = array($this->copy_skip($this->token_blank), '', '');\r
			}\r
			else\r
				break;\r
		} while ($this->char!=='>' && $this->char!=='/');\r
\r
		$this->link_nodes($node, true);\r
		$node->_[HDOM_INFO_ENDSPACE] = $space[0];\r
\r
		// check self closing\r
		if ($this->copy_until_char_escape('>')==='/')\r
		{\r
			$node->_[HDOM_INFO_ENDSPACE] .= '/';\r
			$node->_[HDOM_INFO_END] = 0;\r
		}\r
		else\r
		{\r
			// reset parent\r
			if (!isset($this->self_closing_tags[strtolower($node->tag)])) $this->parent = $node;\r
		}\r
		$this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next\r
\r
		// If it's a BR tag, we need to set it's text to the default text.\r
		// This way when we see it in plaintext, we can generate formatting that the user wants.\r
		// since a br tag never has sub nodes, this works well.\r
		if ($node->tag == "br")\r
		{\r
			$node->_[HDOM_INFO_INNER] = $this->default_br_text;\r
		}\r
\r
		return true;\r
	}\r
\r
	// parse attributes\r
	protected function parse_attr($node, $name, &$space)\r
	{\r
		// Per sourceforge: http://sourceforge.net/tracker/?func=detail&aid=3061408&group_id=218559&atid=1044037\r
		// If the attribute is already defined inside a tag, only pay atetntion to the first one as opposed to the last one.\r
		if (isset($node->attr[$name]))\r
		{\r
			return;\r
		}\r
\r
		$space[2] = $this->copy_skip($this->token_blank);\r
		switch ($this->char) {\r
			case '"':\r
				$node->_[HDOM_INFO_QUOTE][] = HDOM_QUOTE_DOUBLE;\r
				$this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next\r
				$node->attr[$name] = $this->restore_noise($this->copy_until_char_escape('"'));\r
				$this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next\r
				break;\r
			case '\'':\r
				$node->_[HDOM_INFO_QUOTE][] = HDOM_QUOTE_SINGLE;\r
				$this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next\r
				$node->attr[$name] = $this->restore_noise($this->copy_until_char_escape('\''));\r
				$this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next\r
				break;\r
			default:\r
				$node->_[HDOM_INFO_QUOTE][] = HDOM_QUOTE_NO;\r
				$node->attr[$name] = $this->restore_noise($this->copy_until($this->token_attr));\r
		}\r
		// PaperG: Attributes should not have \r or \n in them, that counts as html whitespace.\r
		$node->attr[$name] = str_replace("\r", "", $node->attr[$name]);\r
		$node->attr[$name] = str_replace("\n", "", $node->attr[$name]);\r
		// 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.\r
		if ($name == "class") {\r
			$node->attr[$name] = trim($node->attr[$name]);\r
		}\r
	}\r
\r
	// link node's parent\r
	protected function link_nodes(&$node, $is_child)\r
	{\r
		$node->parent = $this->parent;\r
		$this->parent->nodes[] = $node;\r
		if ($is_child)\r
		{\r
			$this->parent->children[] = $node;\r
		}\r
	}\r
\r
	// as a text node\r
	protected function as_text_node($tag)\r
	{\r
		$node = new simple_html_dom_node($this);\r
		++$this->cursor;\r
		$node->_[HDOM_INFO_TEXT] = '</' . $tag . '>';\r
		$this->link_nodes($node, false);\r
		$this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next\r
		return true;\r
	}\r
\r
	protected function skip($chars)\r
	{\r
		$this->pos += strspn($this->doc, $chars, $this->pos);\r
		$this->char = ($this->pos<$this->size) ? $this->doc[$this->pos] : null; // next\r
	}\r
\r
	protected function copy_skip($chars)\r
	{\r
		$pos = $this->pos;\r
		$len = strspn($this->doc, $chars, $pos);\r
		$this->pos += $len;\r
		$this->char = ($this->pos<$this->size) ? $this->doc[$this->pos] : null; // next\r
		if ($len===0) return '';\r
		return substr($this->doc, $pos, $len);\r
	}\r
\r
	protected function copy_until($chars)\r
	{\r
		$pos = $this->pos;\r
		$len = strcspn($this->doc, $chars, $pos);\r
		$this->pos += $len;\r
		$this->char = ($this->pos<$this->size) ? $this->doc[$this->pos] : null; // next\r
		return substr($this->doc, $pos, $len);\r
	}\r
\r
	protected function copy_until_char($char)\r
	{\r
		if ($this->char===null) return '';\r
\r
		if (($pos = strpos($this->doc, $char, $this->pos))===false) {\r
			$ret = substr($this->doc, $this->pos, $this->size-$this->pos);\r
			$this->char = null;\r
			$this->pos = $this->size;\r
			return $ret;\r
		}\r
\r
		if ($pos===$this->pos) return '';\r
		$pos_old = $this->pos;\r
		$this->char = $this->doc[$pos];\r
		$this->pos = $pos;\r
		return substr($this->doc, $pos_old, $pos-$pos_old);\r
	}\r
\r
	protected function copy_until_char_escape($char)\r
	{\r
		if ($this->char===null) return '';\r
\r
		$start = $this->pos;\r
		while (1)\r
		{\r
			if (($pos = strpos($this->doc, $char, $start))===false)\r
			{\r
				$ret = substr($this->doc, $this->pos, $this->size-$this->pos);\r
				$this->char = null;\r
				$this->pos = $this->size;\r
				return $ret;\r
			}\r
\r
			if ($pos===$this->pos) return '';\r
\r
			if ($this->doc[$pos-1]==='\\') {\r
				$start = $pos+1;\r
				continue;\r
			}\r
\r
			$pos_old = $this->pos;\r
			$this->char = $this->doc[$pos];\r
			$this->pos = $pos;\r
			return substr($this->doc, $pos_old, $pos-$pos_old);\r
		}\r
	}\r
\r
	// remove noise from html content\r
	// save the noise in the $this->noise array.\r
	protected function remove_noise($pattern, $remove_tag=false)\r
	{\r
		global $debug_object;\r
		if (is_object($debug_object)) { $debug_object->debug_log_entry(1); }\r
\r
		$count = preg_match_all($pattern, $this->doc, $matches, PREG_SET_ORDER|PREG_OFFSET_CAPTURE);\r
\r
		for ($i=$count-1; $i>-1; --$i)\r
		{\r
			$key = '___noise___'.sprintf('% 5d', count($this->noise)+1000);\r
			if (is_object($debug_object)) { $debug_object->debug_log(2, 'key is: ' . $key); }\r
			$idx = ($remove_tag) ? 0 : 1;\r
			$this->noise[$key] = $matches[$i][$idx][0];\r
			$this->doc = substr_replace($this->doc, $key, $matches[$i][$idx][1], strlen($matches[$i][$idx][0]));\r
		}\r
\r
		// reset the length of content\r
		$this->size = strlen($this->doc);\r
		if ($this->size>0)\r
		{\r
			$this->char = $this->doc[0];\r
		}\r
	}\r
\r
	// restore noise to html content\r
	function restore_noise($text)\r
	{\r
		global $debug_object;\r
		if (is_object($debug_object)) { $debug_object->debug_log_entry(1); }\r
\r
		while (($pos=strpos($text, '___noise___'))!==false)\r
		{\r
			// Sometimes there is a broken piece of markup, and we don't GET the pos+11 etc... token which indicates a problem outside of us...\r
			if (strlen($text) > $pos+15)\r
			{\r
				$key = '___noise___'.$text[$pos+11].$text[$pos+12].$text[$pos+13].$text[$pos+14].$text[$pos+15];\r
				if (is_object($debug_object)) { $debug_object->debug_log(2, 'located key of: ' . $key); }\r
\r
				if (isset($this->noise[$key]))\r
				{\r
					$text = substr($text, 0, $pos).$this->noise[$key].substr($text, $pos+16);\r
				}\r
				else\r
				{\r
					// do this to prevent an infinite loop.\r
					$text = substr($text, 0, $pos).'UNDEFINED NOISE FOR KEY: '.$key . substr($text, $pos+16);\r
				}\r
			}\r
			else\r
			{\r
				// There is no valid key being given back to us... We must get rid of the ___noise___ or we will have a problem.\r
				$text = substr($text, 0, $pos).'NO NUMERIC NOISE KEY' . substr($text, $pos+11);\r
			}\r
		}\r
		return $text;\r
	}\r
\r
	// Sometimes we NEED one of the noise elements.\r
	function search_noise($text)\r
	{\r
		global $debug_object;\r
		if (is_object($debug_object)) { $debug_object->debug_log_entry(1); }\r
\r
		foreach($this->noise as $noiseElement)\r
		{\r
			if (strpos($noiseElement, $text)!==false)\r
			{\r
				return $noiseElement;\r
			}\r
		}\r
	}\r
	function __toString()\r
	{\r
		return $this->root->innertext();\r
	}\r
\r
	function __get($name)\r
	{\r
		switch ($name)\r
		{\r
			case 'outertext':\r
				return $this->root->innertext();\r
			case 'innertext':\r
				return $this->root->innertext();\r
			case 'plaintext':\r
				return $this->root->text();\r
			case 'charset':\r
				return $this->_charset;\r
			case 'target_charset':\r
				return $this->_target_charset;\r
		}\r
	}\r
\r
	// camel naming conventions\r
	function childNodes($idx=-1) {return $this->root->childNodes($idx);}\r
	function firstChild() {return $this->root->first_child();}\r
	function lastChild() {return $this->root->last_child();}\r
	function createElement($name, $value=null) {return @str_get_html("<$name>$value</$name>")->first_child();}\r
	function createTextNode($value) {return @end(str_get_html($value)->nodes);}\r
	function getElementById($id) {return $this->find("#$id", 0);}\r
	function getElementsById($id, $idx=null) {return $this->find("#$id", $idx);}\r
	function getElementByTagName($name) {return $this->find($name, 0);}\r
	function getElementsByTagName($name, $idx=-1) {return $this->find($name, $idx);}\r
	function loadFile() {$args = func_get_args();$this->load_file($args);}\r
}\r
\r
?>