fsockopen関数エラーの解決方法

<?//获取文件大小function remote_filesize($url_file){    if (!remote_file_exists($url_file)) return false;    $headInf = get_headers($url_file,1);    return $headInf['Content-Length'];}//判断文件是否存在function remote_file_exists($url_file){     $url_file = trim($url_file);    if (empty($url_file)) return false;    $url_arr = parse_url($url_file);    if (!is_array($url_arr) || empty($url_arr)) return false;    $host = $url_arr['host'];    $path = $url_arr['path'] ."?".@$url_arr['query'];    $port = isset($url_arr['port']) ?$url_arr['port'] : "80";    $fp = fsockopen($host, $port, $err_no, $err_str,30);    if (!$fp) return false;    $request_str = "GET ".$path." HTTP/1.1\r\n";    $request_str .= "Host:".$host."\r\n";    $request_str .= "Connection:Close\r\n\r\n";    fwrite($fp,$request_str);    //fread replace fgets    $first_header = fread($fp, 128);    fclose($fp);    if (trim($first_header) == "") return false;    //check $url_file "Content-Location"    if (!preg_match("/200/", $first_header) || preg_match("/Location:/", $first_header)) return false;    return true;}echo remote_filesize("http://wlm212.bjphp1.qq1.cc/down/ee.exe");?>