function curl_redir_exec($ch,$debug="") {     static $curl_loops = 0;     static $curl_max_loops = 20;     if ($curl_loops++ >= $curl_max_loops)     {         $curl_loops = 0;         return FALSE;     }     curl_setopt($ch, CURLOPT_HEADER, true);     curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);     $data = http://www.mamicode.com/curl_exec($ch); "\n\n", $data, 2);     $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);     if ($http_code == 301 || $http_code == 302) {         $matches = array();         preg_match(‘/Location:(.*?)\n/‘, $header, $matches);         $url = @parse_url(trim(array_pop($matches)));         //print_r($url);         if (!$url)         {             //couldn‘t process the url to redirect to             $curl_loops = 0;             return $data;         }         $last_url = parse_url(curl_getinfo($ch, CURLINFO_EFFECTIVE_URL));     /*    if (!$url[‘scheme‘])             $url[‘scheme‘] = $last_url[‘scheme‘];         if (!$url[‘host‘])             $url[‘host‘] = $last_url[‘host‘];         if (!$url[‘path‘])             $url[‘path‘] = $last_url[‘path‘];*/         $new_url = $url[‘scheme‘] . ‘://‘ . $url[‘host‘] . $url[‘path‘] . ($url[‘query‘]?‘?‘.$url[‘query‘]:‘‘);         curl_setopt($ch, CURLOPT_URL, $new_url);     //    debug(‘Redirecting to‘, $new_url);         return curl_redir_exec($ch);     } else {         $curl_loops=0;         return $debbbb;     } } 

curl_redir_exec()函数