PHP用socket开启多线程

$fp = fsockopen('127.0.0.1', 80, $errno, $errstr, 60);if($fp) {    socket_set_blocking($fp, 0);    $http = "GET /Admin/Index/delQiniuImg HTTP/1.1\r\n";    $http .= "Host: 127.0.0.1\r\n";    $http .= "Connection: Close\r\n\r\n";    fwrite($fp, $http);    fclose($fp);}