/**

     * 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);