使用Simple-Html-Dom爬取其他网站html数据的实例运用

使用Simple-Html-Dom爬取其他网站html数据的实例运用

    /**
     * 获取其他网站的日历内容
     */
    public function calendarSimplehtml()
    {
        //判断redis是否存在数据
        $key = "Kaijang:lottery:calendar:simplehtml";
        $calendarSimplehtmlRedis = Redis::getInstance()->redisGet($key);

        if ($calendarSimplehtmlRedis["data"]) {
            $data = json_decode($calendarSimplehtmlRedis["data"], true);
        } else {
            $str = file_get_contents("compress.zlib://https://www.rili.com.cn/");
            if (empty($str)) {
                	hinkfacadeLog::error("日历抓取数据失败");
                return [];
            }
            $encode = mb_detect_encoding($str, array("ASCII", "UTF-8", "GB2312", "GBK", "BIG5"));
            $str = mb_convert_encoding($str, "UTF-8", $encode);

            $htmlDom = new SimpleHtmlDom();
            $html = $htmlDom->load($str);

            $data["today_24jie"] = $html->find("span[id=today_24jie]", 0)->innertext;
            $data["today_dlleft"] = $html->find("span[id=today_dlleft]", 0)->innertext;
            $data["today_dlright"] = $html->find("span[id=today_dlright]", 0)->innertext;
            $data["today_week_id"] = $html->find("span[id=today_week_id]", 0)->innertext;
            $data["today_nongli"] = $html->find("span[id=today_nongli]", 0)->innertext;

            foreach ($html->find("tbody tr ul") as $ul) {
                $ulHtmlArr[] = $ul->innertext;
            }
            //宜
            $lihtml = $htmlDom->load($ulHtmlArr[0]);
            foreach ($lihtml->find("li") as $eli) {
                $data["yiArr"][] = $eli->innertext;
            }
            //忌
            $lihtml = $htmlDom->load($ulHtmlArr[1]);
            foreach ($lihtml->find("li") as $eli) {
                $data["jiArr"][] = $eli->innertext;
            }
            //明天凌晨时间戳
            $tomorrowWeehoursStrtotime = strtotime(date("Y-m-d", strtotime("+1 day")));
            //现在到明天凌晨的时间戳差
            $deltaTStrtotime = $tomorrowWeehoursStrtotime - time();
            //开奖和预测数据写入缓存
            Redis::getInstance()->redisSet($key, json_encode($data), $deltaTStrtotime);
        }

        return $data;
    }

SimpleHtmlDom.php

<?php

namespace appcommon;

/**
 * Website: http://sourceforge.net/projects/simplehtmldom/
 * 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 
 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: 196 $)
 * @package PlaceLocalInclude
 * @subpackage SimpleHtmlDom
 */

/**
 * 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", "
");
define("DEFAULT_SPAN_TEXT", " ");
if (!defined("MAX_FILE_SIZE")) {
    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 = 0, $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 SimpleHtmlDom(null, $lowercase, $forceTagsClosed, $target_charset, $stripRN, $defaultBRText, $defaultSpanText);

	do {
		$repeat = false;
		if ($context!==NULL)
		{
			// Test if "Accept-Encoding: gzip" has been set in $context
			$params = stream_context_get_params($context);
			if (isset($params["options"]["http"]["header"]) && preg_match("/gzip/", $params["options"]["http"]["header"]) !== false)
			{
				$contents = file_get_contents("compress.zlib://".$url, $use_include_path, $context, $offset);
			}
			else
			{
				$contents = file_get_contents($url, $use_include_path, $context, $offset);
			}
		}
		else
		{
		  	$contents = file_get_contents($url, $use_include_path, NULL, $offset);
//		  	var_dump($contents);exit;
		}
//var_dump($http_response_header[0]);exit;
		// test if the URL doesn"t return a 200 status
//		if (isset($http_response_header) && strpos($http_response_header[0], "200") === false) {
//			 has a 301 redirect header been sent?
//			$pattern = "/^Location:s*(.*)$/i";
//			$location_headers = preg_grep($pattern, $http_response_header);
//
//			if (!empty($location_headers) && preg_match($pattern, array_values($location_headers)[0], $matches)) {
//				 set the URL to that returned via the redirect header and repeat this loop
//				$url = $matches[1];
//				$repeat = true;
//			}
//		}
  	} while ($repeat);
    
	// stop processing if the header isn"t a good responce
  	if (isset($http_response_header) && strpos($http_response_header[0], "200") === false)
	{
  		return false;
  	}	
	
	// stop processing if the contents are too big
    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 SimpleHtmlDom(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 SimpleHtmlDomNode
{
    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 "
";

        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 .= "
";

        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 $debugObject;
        if (is_object($debugObject)) { $debugObject->debugLogEntry(1); }

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

        while (!is_null($returnDom))
        {
            if (is_object($debugObject)) { $debugObject->debugLog(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 $debugObject;
        if (is_object($debugObject))
        {
            $text = "";
            if ($this->tag == "text")
            {
                if (!empty($this->text))
                {
                    $text = " with text: " . $this->text;
                }
            }
            $debugObject->debugLog(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 $debugObject;
        if (is_object($debugObject)) { $debugObject->debugLogEntry(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($debugObject)) {$debugObject->debugLog(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, $nodeKeyValue);
                }
                if (is_object($debugObject)) {$debugObject->debugLog(2, "after match: " . ($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($node);
        }
        // It"s passed by reference so this is actually what this function returns.
        if (is_object($debugObject)) {$debugObject->debugLog(1, "EXIT - ret: ", $ret);}
    }

    protected function match($exp, $pattern, $value) {
        global $debugObject;
        if (is_object($debugObject)) {$debugObject->debugLogEntry(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 $debugObject;
        if (is_object($debugObject)) {$debugObject->debugLogEntry(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)." ", $matches, PREG_SET_ORDER);
        if (is_object($debugObject)) {$debugObject->debugLog(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, $value) {
        switch ($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 $debugObject;
        if (is_object($debugObject)) {$debugObject->debugLogEntry(1);}

        $converted_text = $text;

        $sourceCharset = "";
        $targetCharset = "";

        if ($this->dom)
        {
            $sourceCharset = strtoupper($this->dom->_charset);
            $targetCharset = strtoupper($this->dom->_target_charset);
        }
        if (is_object($debugObject)) {$debugObject->debugLog(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) == "xefxbbxbf")
            {
                $converted_text = substr($converted_text, 3);
            }
            if (substr($converted_text, -3) == "xefxbbxbf")
            {
                $converted_text = substr($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 $debugObject;

        $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 SimpleHtmlDom
{
    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 = " 	
";
    protected $token_equal = " =/>";
    protected $token_slash = " />
	";
    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 $debugObject;

        // prepare
        $this->prepare($str, $lowercase, $stripRN, $defaultBRText, $defaultSpanText);
        // strip out comments
        $this->remove_noise(""<!--(.*?)-->"is");
        // strip out cdata
        $this->remove_noise(""<![CDATA[(.*?)]]>"is", true);
        // 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*scripts*>"is");
        $this->remove_noise(""<s*scripts*>(.*?)<s*/s*scripts*>"is");
        // strip out <style> tags
        $this->remove_noise(""<s*style[^>]*[^/]>(.*?)<s*/s*styles*>"is");
        $this->remove_noise(""<s*styles*>(.*?)<s*/s*styles*>"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 
 
"s if we are told to.
        if ($stripRN) {
            $str = str_replace("
", " ", $str);
            $str = str_replace("
", " ", $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;
        $this->root = new SimpleHtmlDomNode($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];
    }

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

        // text
        $node = new SimpleHtmlDomNode($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 $debugObject;

        $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 = $matches[1];
                if (is_object($debugObject)) {$debugObject->debugLog(2, "header content-type found charset of: " . $charset);}
            }

        }

        if (empty($charset))
        {
            $el = $this->root->find("meta[http-equiv=Content-Type]",0);
            if (!empty($el))
            {
                $fullvalue = $el->content;
                if (is_object($debugObject)) {$debugObject->debugLog(2, "meta content-type tag found" . $fullvalue);}

                if (!empty($fullvalue))
                {
                    $success = preg_match("/charset=(.+)/", $fullvalue, $matches);
                    if ($success)
                    {
                        $charset = $matches[1];
                    }
                    else
                    {
                        // If there is a meta tag, and they don"t specify the character set, research says that it"s typically ISO-8859-1
                        if (is_object($debugObject)) {$debugObject->debugLog(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))
        {
            // Have php try to detect the encoding from the text given to us.
            $charset = mb_detect_encoding($this->root->plaintext . "ascii", $encoding_list = array( "UTF-8", "CP1252" ) );
            if (is_object($debugObject)) {$debugObject->debugLog(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 ($charset === false)
            {
                if (is_object($debugObject)) {$debugObject->debugLog(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($charset) == strtolower("Latin-1")))
        {
            if (is_object($debugObject)) {$debugObject->debugLog(2, "replacing " . $charset . " with CP1252 as its a superset");}
            $charset = "CP1252";
        }

        if (is_object($debugObject)) {$debugObject->debugLog(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 SimpleHtmlDom 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;
        }

        $node = new SimpleHtmlDomNode($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 
 or 
 in them, that counts as html whitespace.
        $node->attr[$name] = str_replace("
", "", $node->attr[$name]);
        $node->attr[$name] = str_replace("
", "", $node->attr[$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)
    {
        $node = new SimpleHtmlDomNode($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 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 $debugObject;
        if (is_object($debugObject)) { $debugObject->debugLogEntry(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($debugObject)) { $debugObject->debugLog(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 $debugObject;
        if (is_object($debugObject)) { $debugObject->debugLogEntry(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[$pos+15];
                if (is_object($debugObject)) { $debugObject->debugLog(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 $debugObject;
        if (is_object($debugObject)) { $debugObject->debugLogEntry(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);}
}

 

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