[Resolvido]Error no str_get_html.php

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<?php
/**
* Website: http://sourceforge.net/projects/simplehtmldom/
* Additional projects that may be used: http://sourceforge.net/projects/debugobject/
* Acknowledge: Jose Solorzano (https://sourceforge.net/projects/php-html/)
* Contributions by:
* Yousuke Kumakura (Attribute filters)
* Vadim Voituk (Negative indexes supports of "find" method)
* Antcs (Constructor with automatically load contents either text or file/url)
*
* all affected sections have comments starting with "PaperG"
*
* Paperg - Added case insensitive testing of the value of the selector.
* Paperg - Added tag_start for the starting index of tags - NOTE: This works but not accurately.
* 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,
* it will almost always be smaller by some amount.
* We use this to determine how far into the file the tag in question is. This "percentage will never be accurate as the $dom->size is the "real" number of bytes the dom was created from.
* but for most purposes, it's a really good estimation.
* Paperg - Added the forceTagsClosed to the dom constructor. Forcing tags closed is great for malformed html, but it CAN lead to parsing errors.
* Allow the user to tell us how much they trust the html.
* Paperg add the text and plaintext to the selectors for the find syntax. plaintext implies text in the innertext of a node. text implies that the tag is a text node.
* This allows for us to find tags based on the text they contain.
* Create find_ancestor_tag to see if a tag is - at any level - inside of another specific tag.
* Paperg: added parse_charset so that we know about the character set of the source document.
* NOTE: If the user's system has a routine called get_last_retrieve_url_contents_content_type availalbe, we will assume it's returning the content-type header from the
* last transfer or curl_exec, and we will parse that and use it in preference to any other method of charset detection.
*
* Found infinite loop in the case of broken html in restore_noise. Rewrote to protect from that.
* PaperG (John Schlick) Added get_display_size for "IMG" tags.
*
* Licensed under The MIT License
* Redistributions of files must retain the above copyright notice.
*
* @author S.C. Chen <me578022@gmail.com>
* @author John Schlick
* @author Rus Carroll
* @version 1.5 ($Rev: 210 $)
* @package PlaceLocalInclude
* @subpackage simple_html_dom
*/

/**
* All of the Defines for the classes below.
* @author S.C. Chen <me578022@gmail.com>
*/

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);
define('DEFAULT_TARGET_CHARSET', 'UTF-8');
define('DEFAULT_BR_TEXT', "\r\n");
define('DEFAULT_SPAN_TEXT', " ");
define('MAX_FILE_SIZE', 600000);

// helper functions
// -----------------------------------------------------------------------------
// get html dom from file
// $maxlen is defined in the code as PHP_STREAM_COPY_ALL which is defined as -1.
function file_get_html($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)
{
// We DO force the tags to be terminated.

	$dom = new simple_html_dom(null, $lowercase, $forceTagsClosed, $target_charset, $stripRN, $defaultBRText, $defaultSpanText);
	// For sourceforge users: uncomment the next line and comment the retreive_url_contents line 2 lines down if it is not already done.
	$contents = file_get_contents($url, $use_include_path, $context, $offset);
	// Paperg - use our own mechanism for getting the contents as we want to control the timeout.
	//$contents = retrieve_url_contents($url);
	if (empty($contents) || strlen($contents) > MAX_FILE_SIZE)
	{
 return false;
	}
	// The second parameter can force the selectors to all be lowercase.
	$dom->load($contents, $lowercase, $stripRN);
	return $dom;
}

// get html dom from string
function str_get_html($str, $lowercase=true, $forceTagsClosed=true, $target_charset = DEFAULT_TARGET_CHARSET, $stripRN=true, $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;
	}
	$dom->load($str, $lowercase, $stripRN);
	return $dom;
}

// dump html dom tree
function dump_html_tree($node, $show_attr=true, $deep=0)
{

	$node->dump($node);
}

/**
* simple html dom node
* PaperG - added ability for "find" routine to lowercase the value of the selector.
* PaperG - added $tag_start to track the start position of the tag in the total byte index
*
* @package PlaceLocalInclude
*/
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;
	// The "info" array - see HDOM_INFO_... for what each element contains.
	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();
	}

	// clean up memory due to php5 circular references memory leak...
	function clear()
	{
 $this->dom = null;
 $this->nodes = null;
 $this->parent = null;
 $this->children = null;
	}

	// dump node's tree
	function dump($show_attr=true, $deep=0)
	{
 $lead = str_repeat('	', $deep);

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

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

	// Debugging function to dump a single dom node with a bunch of information about it.
	function dump_node($echo=true)
	{

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

	// returns the parent of node
	// If a node is passed in, it will reset the parent of the current node to that one.
	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;
	}

	// verify that node has children
	function has_child()
	{
 return !empty($this->children);
	}

	// returns children of node
	function children($idx=-1)
	{
 if ($idx===-1)
 {
 return $this->children;
 }
 if (isset($this->children[$idx]))
 {
 return $this->children[$idx];
 }
 return null;
	}

	// returns the first child of node
	function first_child()
	{
 if (count($this->children)>0)
 {
 return $this->children[0];
 }
 return null;
	}

	// returns the last child of node
	function last_child()
	{
 if (($count=count($this->children))>0)
 {
 return $this->children[$count-1];
 }
 return null;
	}

	// returns the next sibling of node
	function next_sibling()
	{
 if ($this->parent===null)
 {
 return null;
 }

 $idx = 0;
 $count = count($this->parent->children);
 while ($idx<$count && $this!==$this->parent->children[$idx])
 {
 ++$idx;
 }
 if (++$idx>=$count)
 {
 return null;
 }
 return $this->parent->children[$idx];
	}

	// returns the previous sibling of node
	function prev_sibling()
	{
 if ($this->parent===null) return null;
 $idx = 0;
 $count = count($this->parent->children);
 while ($idx<$count && $this!==$this->parent->children[$idx])
 ++$idx;
 if (--$idx<0) return null;
 return $this->parent->children[$idx];
	}

	// function to locate a specific ancestor tag in the path to the root.
	function find_ancestor_tag($tag)
	{
 global $debug_object;
 if (is_object($debug_object)) { $debug_object->debug_log_entry(1); }

 // Start by including ourselves in the comparison.
 $returnDom = $this;

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

 if ($returnDom->tag == $tag)
 {
 break;
 }
 $returnDom = $returnDom->parent;
 }
 return $returnDom;
	}

	// get dom node's inner html
	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;
	}

	// get dom node's outer text (with tag)
	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();

 // trigger callback
 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]);

 // render begin tag
 if ($this->dom && $this->dom->nodes[$this->_[HDOM_INFO_BEGIN]])
 {
 $ret = $this->dom->nodes[$this->_[HDOM_INFO_BEGIN]]->makeup();
 } else {
 $ret = "";
 }

 // render inner text
 if (isset($this->_[HDOM_INFO_INNER]))
 {
 // If it's a br tag... don't return the HDOM_INNER_INFO that we may or may not have added.
 if ($this->tag != "br")
 {
 $ret .= $this->_[HDOM_INFO_INNER];
 }
 } else {
 if ($this->nodes)
 {
 foreach ($this->nodes as $n)
 {
 $ret .= $this->convert_text($n->outertext());
 }
 }
 }

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

	// get dom node's plain text
	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)
 {
 $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 ($this->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;
	}

	// build node's text with tag
	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] . '>';
	}

	// find elements by css selector
	//PaperG - added ability for find to lowercase the value of the selector.
	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);

 // 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, $lowercase);
 }
 $head = $ret;
 }

 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 $found;
 else if ($idx<0) $idx = count($found) + $idx;
 return (isset($found[$idx])) ? $found[$idx] : null;
	}

	// seek for given conditions
	// PaperG - added parameter to allow for case insensitive testing of the value of a selector.
	protected function seek($selector, &$ret, $lowercase=false)
	{
 global $debug_object;
 if (is_object($debug_object)) { $debug_object->debug_log_entry(1); }

 list($tag, $key, $val, $exp, $no_key) = $selector;

 // xpath index
 if ($tag && $key && is_numeric($key))
 {
 $count = 0;
 foreach ($this->children as $c)
 {
 if ($tag==='*' || $tag===$c->tag) {
 if (++$count==$key) {
 $ret[$c->_[HDOM_INFO_BEGIN]] = 1;
 return;
 }
 }
 }
 return;
 }

 $end = (!empty($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];
 }

 for ($i=$this->_[HDOM_INFO_BEGIN]+1; $i<$end; ++$i) {
 $node = $this->dom->nodes[$i];

 $pass = true;

 if ($tag==='*' && !$key) {
 if (in_array($node, $this->children, true))
 $ret[$i] = 1;
 continue;
 }

 // compare tag
 if ($tag && $tag!=$node->tag && $tag!=='*') {$pass=false;}
 // compare key
 if ($pass && $key) {
 if ($no_key) {
 if (isset($node->attr[$key])) $pass=false;
 } else {
 if (($key != "plaintext") && !isset($node->attr[$key])) $pass=false;
 }
 }
 // compare value
 if ($pass && $key && $val && $val!=='*') {
 // If they have told us that this is a "plaintext" search then we want the plaintext of the node - right?
 if ($key == "plaintext") {
 // $node->plaintext actually returns $node->text();
 $nodeKeyValue = $node->text();
 } else {
 // this is a normal search, we want the value of that attribute of the tag.
 $nodeKeyValue = $node->attr[$key];
 }
 if (is_object($debug_object)) {$debug_object->debug_log(2, "testing node: " . $node->tag . " for attribute: " . $key . $exp . $val . " where nodes value is: " . $nodeKeyValue);}

 //PaperG - If lowercase is set, do a case insensitive test of the value of the selector.
 if ($lowercase) {
 $check = $this->match($exp, strtolower($val), strtolower($nodeKeyValue));
 } else {
 $check = $this->match($exp, $val, $nodeKeyValue);
 }
 if (is_object($debug_object)) {$debug_object->debug_log(2, "after match: " . ($check ? "true" : "false"));}

 // handle multiple class
 if (!$check && strcasecmp($key, 'class')===0) {
 foreach (explode(' ',$node->attr[$key]) as $k) {
 // Without this, there were cases where leading, trailing, or double spaces lead to our comparing blanks - bad form.
 if (!empty($k)) {
 if ($lowercase) {
 $check = $this->match($exp, strtolower($val), strtolower($k));
 } else {
 $check = $this->match($exp, $val, $k);
 }
 if ($check) break;
 }
 }
 }
 if (!$check) $pass = false;
 }
 if ($pass) $ret[$i] = 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) {
 global $debug_object;
 if (is_object($debug_object)) {$debug_object->debug_log_entry(1);}

 switch ($exp) {
 case '=':
 return ($value===$pattern);
 case '!=':
 return ($value!==$pattern);
 case '^=':
 return preg_match("/^".preg_quote($pattern,'/')."/", $value);
 case '$=':
 return preg_match("/".preg_quote($pattern,'/')."$/", $value);
 case '*=':
 if ($pattern[0]=='/') {
 return preg_match($pattern, $value);
 }
 return preg_match("/".$pattern."/i", $value);
 }
 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
 // Paperg: Add the colon to the attrbute, so that it properly finds <tag attr:ibute="something" > like google does.
 // Note: if you try to look at this attribute, yo MUST use getAttribute since $dom->x:y will fail the php syntax check.

// Notice the \[ starting the attbute? 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.

// $pattern = "/([\w-:\*]*)(?:\#([\w-]+)|\.([\w-]+))?(?:\[@?(!?[\w-]+)(?:([!*^$]?=)[\"']?(.*?)[\"']?)?\])?([\/, ]+)/is";
 $pattern = "/([\w-:\*]*)(?:\#([\w-]+)|\.([\w-]+))?(?:\[@?(!?[\w-:]+)(?:([!*^$]?=)[\"']?(.*?)[\"']?)?\])?([\/, ]+)/is";
 preg_match_all($pattern, trim($selector_string).' ', $matches, PREG_SET_ORDER);
 if (is_object($debug_object)) {$debug_object->debug_log(2, "Matches Array: ", $matches);}

 $selectors = array();
 $result = array();
 //print_r($matches);

 foreach ($matches as $m) {
 $m[0] = trim($m[0]);
 if ($m[0]==='' || $m[0]==='/' || $m[0]==='//') continue;
 // for browser generated xpath
 if ($m[1]==='tbody') continue;

 list($tag, $key, $val, $exp, $no_key) = array($m[1], null, null, '=', false);
 if (!empty($m[2])) {$key='id'; $val=$m[2];}
 if (!empty($m[3])) {$key='class'; $val=$m[3];}
 if (!empty($m[4])) {$key=$m[4];}
 if (!empty($m[5])) {$exp=$m[5];}
 if (!empty($m[6])) {$val=$m[6];}

 // convert to lowercase
 if ($this->dom->lowercase) {$tag=strtolower($tag); $key=strtolower($key);}
 //elements that do NOT have the specified attribute
 if (isset($key[0]) && $key[0]==='!') {$key=substr($key, 1); $no_key=true;}

 $result[] = array($tag, $key, $val, $exp, $no_key);
 if (trim($m[7])===',') {
 $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]);
	}

	// PaperG - Function to convert the text from one character set to another if the two sets are not the same.
	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;
	}

	/**
	* Returns true if $string is valid UTF-8 and false otherwise.
	*
	* @param mixed $str String to be tested
	* @return boolean
	*/
	static function is_utf8($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;
 $bits--;
 }
 }
 }
 return true;
	}
	/*
	function is_utf8($string)
	{
 //this is buggy
 return (utf8_encode(utf8_decode($string)) == $string);
	}
	*/

	/**
 * Function to try a few tricks to determine the displayed size of an img on the page.
 * NOTE: This will ONLY work on an IMG tag. Returns FALSE on all other tag types.
 *
 * @author John Schlick
 * @version April 19 2012
 * @return array an array containing the 'height' and 'width' of the image on the page or -1 if we can't figure it out.
 */
	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;
	}

	// camel naming conventions
	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($name, null);}
	function getElementById($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;}

}

/**
* simple html dom parser
* Paperg - in the find routine: allow us to specify that we want case insensitive testing of the value of the selector.
* Paperg - change $size from protected to public so we can easily access it
* Paperg - added ForceTagsClosed in the constructor which tells us whether we trust the html or not. Default is to NOT trust it.
*
* @package PlaceLocalInclude
*/
class simple_html_dom
{

	public $root = null;
	public $nodes = array();
	public $callback = null;
	public $lowercase = false;
	// Used to keep track of how large the text was when we started.
	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 = ' >';
	// Note that this is referenced by a child node, and so it needs to be public for that node to see this information.
	public $_charset = '';
	public $_target_charset = '';
	protected $default_br_text = "";
	public $default_span_text = "";

	// use isset instead of in_array, performance boost about 30%...
	protected $self_closing_tags = array('img'=>1, 'br'=>1, 'input'=>1, 'meta'=>1, 'link'=>1, 'hr'=>1, 'base'=>1, 'embed'=>1, 'spacer'=>1);
	protected $block_tags = array('root'=>1, 'body'=>1, 'form'=>1, 'div'=>1, 'span'=>1, 'table'=>1);
	// Known sourceforge issue #2977341
	// B tags that are not closed cause us to return everything to the end of the document.
	protected $optional_closing_tags = array(
 'tr'=>array('tr'=>1, 'td'=>1, 'th'=>1),
 'th'=>array('th'=>1),
 'td'=>array('td'=>1),
 'li'=>array('li'=>1),
 'dt'=>array('dt'=>1, 'dd'=>1),
 'dd'=>array('dd'=>1, 'dt'=>1),
 'dl'=>array('dd'=>1, 'dt'=>1),
 'p'=>array('p'=>1),
 'nobr'=>array('nobr'=>1),
 'b'=>array('b'=>1),
 'option'=>array('option'=>1),
	);

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

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

	// load html from string
	function load($str, $lowercase=true, $stripRN=true, $defaultBRText=DEFAULT_BR_TEXT, $defaultSpanText=DEFAULT_SPAN_TEXT)
	{
 global $debug_object;

 // prepare
 $this->prepare($str, $lowercase, $stripRN, $defaultBRText, $defaultSpanText);
 // strip out cdata
 $this->remove_noise("'<!\[CDATA\[(.*?)\]\]>'is", true);
 // strip out comments
 $this->remove_noise("'<!--(.*?)-->'is");
 // 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 <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);
 // strip smarty scripts
 $this->remove_noise("'(\{\w)(.*?)(\})'s", true);

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

 // make load function chainable
 return $this;

	}

	// load html from file
	function load_file()
	{
 $args = func_get_args();
 $this->load(call_user_func_array('file_get_contents', $args), true);
 // Throw an error if we can't properly load the dom.
 if (($error=error_get_last())!==null) {
 $this->clear();
 return false;
 }
	}

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

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

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

	// find dom node by css selector
	// Paperg - allow us to specify that we want case insensitive testing of the value of the selector.
	function find($selector, $idx=null, $lowercase=false)
	{
 return $this->root->find($selector, $idx, $lowercase);
	}

	// clean up memory due to php5 circular references memory leak...
	function clear()
	{
 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);
	}

	// prepare HTML data and init everything
	protected function prepare($str, $lowercase=true, $stripRN=true, $defaultBRText=DEFAULT_BR_TEXT, $defaultSpanText=DEFAULT_SPAN_TEXT)
	{
 $this->clear();

 // set the length of content before we do anything to it.
 $this->size = strlen($str);
 // Save the original size of the html that we got in. It might be useful to someone.
 $this->original_size = $this->size;

 //before we save the string as the doc... strip out the \r \n's if we are told to.
 if ($stripRN) {
 $str = str_replace("\r", " ", $str);
 $str = str_replace("\n", " ", $str);

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

 $this->doc = $str;
 $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];
	}

	// parse html content
	protected function parse()
	{
 if (($s = $this->copy_until_char('<'))==='')
 {
 return $this->read_tag();
 }

 // text
 $node = new simple_html_dom_node($this);
 ++$this->cursor;
 $node->_[HDOM_INFO_TEXT] = $s;
 $this->link_nodes($node, false);
 return true;
	}

	// 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.
	// 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
	// (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.
	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))
 {
 $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 we couldn't find a charset above, then lets try to detect one based on the text we got...
 if (empty($charset))
 {
 // Use this in case mb_detect_charset isn't installed/loaded on this machine.
 $charset = false;
 if (function_exists('mb_detect_encoding'))
 {
 // Have php try to detect the encoding from the text given to us.
 $charset = mb_detect_encoding($this->root->plaintext . "ascii", $encoding_list = array( "UTF-8", "CP1252" ) );
 if (is_object($debug_object)) {$debug_object->debug_log(2, 'mb_detect found: ' . $charset);}
 }

 // 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...
 if ($charset === false)
 {
 if (is_object($debug_object)) {$debug_object->debug_log(2, 'since mb_detect failed - using default of utf-8');}
 $charset = 'UTF-8';
 }
 }

 // Since CP1252 is a superset, if we get one of it's subsets, we want it instead.
 if ((strtolower($charset) == strtolower('ISO-8859-1')) || (strtolower($charset) == strtolower('Latin1')) || (strtolower($charset) == strtolower('Latin-1')))
 {
 if (is_object($debug_object)) {$debug_object->debug_log(2, 'replacing ' . $charset . ' with CP1252 as its a superset');}
 $charset = 'CP1252';
 }

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

 return $this->_charset = $charset;
	}

	// read tag info
	protected function read_tag()
	{
 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
 // This represents the change in the simple_html_dom trunk from revision 180 to 181.
 // $this->skip($this->token_blank_t);
 $this->skip($this->token_blank);
 $tag = $this->copy_until_char('>');

 // skip attributes in end tag
 if (($pos = strpos($tag, ' '))!==false)
 $tag = substr($tag, 0, $pos);

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

 if ($parent_lower!==$tag_lower)
 {
 if (isset($this->optional_closing_tags[$parent_lower]) && isset($this->block_tags[$tag_lower]))
 {
 $this->parent->_[HDOM_INFO_END] = 0;
 $org_parent = $this->parent;

 while (($this->parent->parent) && strtolower($this->parent->tag)!==$tag_lower)
 $this->parent = $this->parent->parent;

 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);
 }
 }
 else if (($this->parent->parent) && isset($this->block_tags[$tag_lower]))
 {
 $this->parent->_[HDOM_INFO_END] = 0;
 $org_parent = $this->parent;

 while (($this->parent->parent) && strtolower($this->parent->tag)!==$tag_lower)
 $this->parent = $this->parent->parent;

 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);
 }
 }
 else if (($this->parent->parent) && strtolower($this->parent->parent->tag)===$tag_lower)
 {
 $this->parent->_[HDOM_INFO_END] = 0;
 $this->parent = $this->parent->parent;
 }
 else
 return $this->as_text_node($tag);
 }

 $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;
 }

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

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

 if (isset($tag[2]) && $tag[1]==='-' && $tag[2]==='-') {
 $node->nodetype = HDOM_TYPE_COMMENT;
 $node->tag = 'comment';
 } else {
 $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;
 }

 // text
 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;
 }

 if (!preg_match("/^[\w-:]+$/", $tag)) {
 $node->_[HDOM_INFO_TEXT] = '<' . $tag . $this->copy_until('<>');
 if ($this->char==='<') {
 $this->link_nodes($node, false);
 return true;
 }

 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
 $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]) )
 {
 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
 $space = array($this->copy_skip($this->token_blank), '', '');

 // attributes
 do
 {
 if ($this->char!==null && $space[0]==='')
 {
 break;
 }
 $name = $this->copy_until($this->token_equal);
 if ($guard===$this->pos)
 {
 $this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
 continue;
 }
 $guard = $this->pos;

 // handle endless '<'
 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 '<'
 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!=='') {
 $space[1] = $this->copy_skip($this->token_blank);
 $name = $this->restore_noise($name);
 if ($this->lowercase) $name = strtolower($name);
 if ($this->char==='=') {
 $this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
 $this->parse_attr($node, $name, $space);
 }
 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;
 $space = array($this->copy_skip($this->token_blank), '', '');
 }
 else
 break;
 } while ($this->char!=='>' && $this->char!=='/');

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

 // check self closing
 if ($this->copy_until_char_escape('>')==='/')
 {
 $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;
	}

	// parse attributes
	protected function parse_attr($node, $name, &$space)
	{
 // Per sourceforge: http://sourceforge.net/tracker/?func=detail&aid=3061408&group_id=218559&atid=1044037
 // If the attribute is already defined inside a tag, only pay atetntion to the first one as opposed to the last one.
 if (isset($node->attr[$name]))
 {
 return;
 }

 $space[2] = $this->copy_skip($this->token_blank);
 switch ($this->char) {
 case '"':
 $node->_[HDOM_INFO_QUOTE][] = HDOM_QUOTE_DOUBLE;
 $this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
 $node->attr[$name] = $this->restore_noise($this->copy_until_char_escape('"'));
 $this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
 break;
 case '\'':
 $node->_[HDOM_INFO_QUOTE][] = HDOM_QUOTE_SINGLE;
 $this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
 $node->attr[$name] = $this->restore_noise($this->copy_until_char_escape('\''));
 $this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
 break;
 default:
 $node->_[HDOM_INFO_QUOTE][] = HDOM_QUOTE_NO;
 $node->attr[$name] = $this->restore_noise($this->copy_until($this->token_attr));
 }
 // PaperG: Attributes should not have \r or \n in them, that counts as html whitespace.
 $node->attr[$name] = str_replace("\r", "", $node->attr[$name]);
 $node->attr[$name] = str_replace("\n", "", $node->attr[$name]);
 // 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") {
 $node->attr[$name] = trim($node->attr[$name]);
 }
	}

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

	// as a text 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 copy_until_char_escape($char)
	{
 if ($this->char===null) return '';

 $start = $this->pos;
 while (1)
 {
 if (($pos = strpos($this->doc, $char, $start))===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 '';

 if ($this->doc[$pos-1]==='\\') {
 $start = $pos+1;
 continue;
 }

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

	// remove noise from html content
	// save the noise in the $this->noise array.
	protected function remove_noise($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;
 $this->noise[$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];
 }
	}

	// restore noise to html content
	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...
 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;
	}

	// Sometimes we NEED one of the noise elements.
	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;
 }
	}

	// camel naming conventions
	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>")->first_child();}
	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);}
}

?>