<?php
/**
 * Website: http://sourceforge.net/projects/simplehtmldom/
  * Version Rev. 1.9.1 (291)
 */


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

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

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

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

	protected $default_br_text = '';

	public $default_span_text = '';

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

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

		$this->_target_charset = $target_charset;
	}

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

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

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

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

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

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

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

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

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

		// make load function chainable
		return $this;
	}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

	protected function parse_charset()
	{
		global $debug_object;

		$charset = null;

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

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

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

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

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

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

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

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

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

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

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

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

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

		return $this->_charset = $charset;
	}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

		$guard = 0; // prevent infinity loop

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

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

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

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

			$guard = $this->pos;

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

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

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

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

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

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

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

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

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

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

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

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

		return true;
	}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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