复制代码 代码如下:
//取重定向的地址
 class redirecturl{
     //地址
     var $url;
     //初始化地址
     function redirecturl($url){
         $this->url = $url;
     }
     /**
      * get_redirect_url()
      * 取重定向的地址
      *
      * @param string $url
      * @return string
      */
     private function get_redirect_url($url){
         $redirect_url = null;
$url_parts = @parse_url($url);
         if (!$url_parts) return false;
         if (!isset($url_parts['host'])) return false; //can't process relative urls
         if (!isset($url_parts['path'])) $url_parts['path'] = '/';
$sock = fsockopen($url_parts['host'], (isset($url_parts['port']) ? (int)$url_parts['port'] : 80), $errno, $errstr, 30);
         if (!$sock) return false;
$request = head . $url_parts['path'] . (isset($url_parts['query']) ?'?'.$url_parts['query'] : '') . http/1.1\r\n;
         $request .= 'host: ' . $url_parts['host'] . \r\n;
         $request .= connection: close\r\n\r\n;
         fwrite($sock, $request);
         $response = '';
         while(!feof($sock)) $response .= fread($sock, 8192);
         fclose($sock);
if (preg_match('/^location: (.+?)$/m', $response, $matches)){
             return trim($matches[1]);
         } else {
             return false;
         }
     }
/**
      * get_all_redirects()
      * 取所有重定向地址
      *
      * @param string $url
      * @return array
      */
     private function get_all_redirects($url){
         $redirects = array();
         while ($newurl = $this->get_redirect_url($url)){
             if (in_array($newurl, $redirects)){
                 break;
             }
             $redirects[] = $newurl;
             $url = $newurl;
         }
         return $redirects;
     }
/**
      * get_final_url()
      * 取实际地址
      *
      * @param string $url
      * @return string
      */
     function get_final_url(){
         $redirects = $this->get_all_redirects($this->url);
if (count($redirects)>0){
             return array_pop($redirects);
         } else {
             return $this->url;
         }
     }
 }
/**
  * get_show_pic
  * 取最终要显示的图片地址
  *
  * @param string $url
  * @return  string
  */
 function get_show_pic($url,$noimg ='noimg.gif',$newimg=http://special.ku6img.com/projects/2010/d-color/images/slt-1.jpg){
     $obj = new redirecturl($url);
$realurl = $obj->get_final_url();
if(strpos($realurl,$noimg)>0){
         return $newimg;
     }
     return $url;
 }
 //参考
 echo ;
 ?>
http://www.bkjia.com/phpjc/327892.htmlwww.bkjia.comtruehttp://www.bkjia.com/phpjc/327892.htmltecharticle复制代码 代码如下: //取重定向的地址 class redirecturl{ //地址 var $url; //初始化地址 function redirecturl($url){ $this-url = $url; } /** * get_redirect_url()...