<?php    $oldSetting = libxml_use_internal_errors( true );    libxml_clear_errors();   /**  *   * -+-----------------------------------  * |PHP5 Framework - 2011  * |Web Site: www.iblue.cc  * |E-mail: mejinke@gmail.com  * |Date: 2012-10-12  * -+-----------------------------------  *   * @desc HTML解析器  * @author jingke  */    class XF_HtmlDom   {       private $_xpath = null;       private $_nodePath = '';       public function __construct($xpath = null, $nodePath = '')       {           $this->_xpath = $xpath;           $this->_nodePath = $nodePath;       }       public function loadHtml($url)       {           ini_set('user_agent', 'Mozilla/5.0 (Linux; U; Android 2.1; en-us; Nexus One Build/ERD62) AppleWebKit/530.17 (KHTML, like Gecko) Version/4.0 Mobile Safari/530.17 –Nexus');           $content = '';           if(strpos(strtolower($url), 'http')===false)           {               $content = file_get_contents($url);           }           else          {               $ch = curl_init();                $user_agent = "Baiduspider+(+http://www.baidu.com/search/spider.htm)";               $user_agent1='Mozilla/5.0 (Windows NT 5.1; rv:6.0) Gecko/20100101 Firefox/6.0';               curl_setopt($ch, CURLOPT_URL, $url);                curl_setopt($ch, CURLOPT_HEADER, false);                curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);                curl_setopt($ch, CURLOPT_REFERER, $url);               curl_setopt($ch, CURLOPT_USERAGENT, $user_agent1);               curl_setopt($ch, CURLOPT_FOLLOWLOCATION,1);               $content =curl_exec($ch);                curl_close($ch);           }           $html = new DOMDocument();            $html->loadHtml($content);            $this->_xpath = new DOMXPath( $html );            //return $this;      }       public function find($query, $index = null)       {           if($this->_nodePath == '')               $this->_nodePath = '//';          else              $this->_nodePath .= '/';           $nodes = $this->_xpath->query($this->_nodePath.$query);           //echo $nodes->item(0)->getNodePath();exit;                     if ($index == null && !is_numeric($index))            {                $tmp = array();               foreach ($nodes as $node)                {                   $tmp[] = new XF_HtmlDom($this->_xpath, $node->getNodePath());               }               return $tmp;           }           return new XF_HtmlDom($this->_xpath,$this->_xpath->query($this->_nodePath.$query)->item($index)->getNodePath());       }       /**      * 获取内容      */      public function text()       {           if ($this->_nodePath != '' && $this->_xpath != null )                return $this->_xpath->query($this->_nodePath)->item(0)->textContent;           else              return false;       }       /**      * 获取属性值      */      public function getAttribute($name)       {           if ($this->_nodePath != '' && $this->_xpath != null )                return $this->_xpath->query($this->_nodePath)->item(0)->getAttribute($name);           else              return false;       }       public function __get($name)       {           if($name == 'innertext')               return $this->text();           else              return $this->getAttribute($name);       }     }     $xp = new xf_HtmlDom();   $xp->loadHtml('http://www.aizhan.com/siteall/www.opendir.cn/');  $rows = $xp->find("td[@id='baidu']/a", 0)->innertext;   print_r($rows);