PHP异步非阻塞fsockopen(本地可以非阻塞请求,服务器就一直执行异步的不成功) (未解决)

    /**
     * php异步请求
     *
     * @param $host string 主机地址
     * @param $path string 路径
     * @param $param array 请求参数
     * @return string
     */
function asyncRequest($url,$post_data=array(),$cookie=array())
    {
        $url_arr = parse_url($url);
        $port = isset($url_arr['port'])?$url_arr['port']:80;

        if($url_arr['scheme'] == 'https'){
            $url_arr['host'] = 'ssl://'.$url_arr['host'];
        }
        $fp = fsockopen($url_arr['host'],$port,$errno,$errstr,30);
        if(!$fp) return false;
        $getPath = isset($url_arr['path'])?$url_arr['path']:'/index.php';
        $getPath .= isset($url_arr['query'])?'?'.$url_arr['query']:'';
        $method = 'GET';  //默认get方式
        if(!empty($post_data)) $method = 'POST';
        $header = "$method  $getPath  HTTP/1.1\r\n";
        $header .= "Host: ".$url_arr['host']."\r\n";

        if(!empty($cookie)){  //传递cookie信息
            $_cookie = strval(NULL);
            foreach($cookie AS $k=>$v){
                $_cookie .= $k."=".$v.";";
            }
            $cookie_str = "Cookie:".base64_encode($_cookie)."\r\n";
            $header .= $cookie_str;
        }

        if(!empty($post_data)){  //传递post数据
            $_post = array();
            foreach($post_data AS $_k=>$_v){
                $_post[] = $_k."=".urlencode($_v);
            }
            $_post = implode('&', $_post);
            $post_str = "Content-Type:application/x-www-form-urlencoded; charset=UTF-8\r\n";
            $post_str .= "Content-Length: ".strlen($_post)."\r\n";  //数据长度
            $post_str .= "Connection:Close\r\n\r\n";
            $post_str .= $_post;  //传递post数据
            $header .= $post_str;
        }else{
            $header .= "Connection:Close\r\n\r\n";
        }
        fwrite($fp, $header);
        usleep(1000); // 这一句也是关键，如果没有这延时，可能在nginx服务器上就无法执行成功
        fclose($fp);
        return true;
    }




        //$url = 'http://xxx.com/1.php';
        $url = 'http://localhost/1.php';
        $res = asyncRequest($url);
        var_dump($res);
        echo "我没有等a站点返回值，我就执行了";

sleep(3);
file_put_contents("1234.txt",time(),FILE_APPEND);

ignore_user_abort (true);
set_time_limit (30);