[置顶] php实现类多线程的方法总结

大家都很清楚，php是不支持多线程的。但对于需要类似多线程功能的人来说确实是个头疼的问题。好在有几种方案可以进行解决，类似多线程功能。下面是本人总结的三种实现多线程类似的方法的方案，下面是三种方案与代码实例。

1、curl_multi方法

当需要多线程的时候，可以用curl_multi一次性请求多个操作来完成，但curl走的是网络通信，效率与可靠性就比较差了的。

function main(){

     $sql = "select waybill_id,order_id from waybill where status>40 order by update_time desc limit 10 ";

       $data = Yii::app()->db->createCommand($sql)->queryAll(); //yii 框架格式

       foreach ($data as $k => $v) { 

           if ($k % 2 == 0) { //偶数发一个网址

               $send_data[$k]['url'] = '';

               $send_data[$k]['body'] = $v['waybill_id'];

           } else { //奇数发送另外一个网址

 

               $send_data[$k]['url'] = 'http://www.abc.com';

               $send_data[$k]['body']=array($v['order_id'] => array('extra' => 16));

           }

       }

 

       $back_data =sendMulitRequest($send_data);

       var_dump($back_data);

   }

 

   function sendMulitRequest($send_data){

 

       $params = array();

 

       $curl = $text = array();

 

 

       $handle = curl_multi_init();

       foreach ($data as $k => $v) {

           if (empty($v['url'])) {

               $v['url'] = "http://www.xxx.com"; //if url is empty,set defalut url

           }

           $reqBody = json_encode($v['body']);

           $reqStream = array(

               'body' => $reqBody,

           );

           $encRequest = base64_encode(json_encode($reqStream));

           $params['data'] = $encRequest;

 

           $curl[$k] = curl_init();

 

           curl_setopt($curl[$k], CURLOPT_URL, $v['url']);

 

           curl_setopt($curl[$k], CURLOPT_POST, TRUE);

           curl_setopt($curl[$k], CURLOPT_HEADER, 0);

 

           curl_setopt($curl[$k], CURLOPT_POSTFIELDS, http_build_query($params));

           curl_setopt($curl[$k], CURLOPT_RETURNTRANSFER, 1);

 

           curl_multi_add_handle($handle, $curl[$k]);

       }

 

       $active = null;

       do {

           $mrc = curl_multi_exec($handle, $active);

       } while ($mrc == CURLM_CALL_MULTI_PERFORM);

 

       while ($active && $mrc == CURLM_OK) {

           if (curl_multi_select($handle) != -1) {

               do {

                   $mrc = curl_multi_exec($handle, $active);

               } while ($mrc == CURLM_CALL_MULTI_PERFORM);

           }

       }

       foreach ($curl as $k => $v) {

 

           if (curl_error($curl[$k]) == "") {

               $text[$k] = (string) curl_multi_getcontent($curl[$k]);

           }

           curl_multi_remove_handle($handle, $curl[$k]);

           curl_close($curl[$k]);

       }

       curl_multi_close($handle);

       return $text;

 

   }

2、通过stream_socket_client 方式

function sendStream() {

 

 

 

        $english_format_number = number_format($number, 4, '.', '');

        echo $english_format_number;

        exit();

        $timeout = 10;

        $result = array();

        $sockets = array();

        $convenient_read_block = 8192;

 

        $host = "test.local.com";

 

        $sql = "select waybill_id,order_id from xm_waybill where status>40 order by update_time desc limit 1 ";

        $data = Yii::app()->db->createCommand($sql)->queryAll();

        $id = 0;

        foreach ($data as $k => $v) {

            if ($k % 2 == 0) {

 

                $send_data[$k]['body'] = NoticeOrder::getSendData($v['waybill_id']);

            } else {

 

                $send_data[$k]['body'] = array($v['order_id'] => array('extra' => 16));

            }

            $data = json_encode($send_data[$k]['body']);

 

            $s = stream_socket_client($host . ":80", $errno, $errstr, $timeout, STREAM_CLIENT_ASYNC_CONNECT | STREAM_CLIENT_CONNECT);

            if ($s) {

                $sockets[$id++] = $s;

                $http_message = "GET /php/test.php?data=" . $data . " HTTP/1.0\r\nHost:" . $host . "\r\n\r\n";

 

                fwrite($s, $http_message);

            } else {

                echo "Stream " . $id . " failed to open correctly.";

            }

        }

 

        while (count($sockets)) {

            $read = $sockets;

            stream_select($read, $w = null, $e = null, $timeout);

            if (count($read)) {

 

                /* stream_select generally shuffles $read, so we need to

                  compute from which socket(s) we're reading. */

                foreach ($read as $r) {

                    $id = array_search($r, $sockets);

                    $data = fread($r, $convenient_read_block);

 

                    if (strlen($data) == 0) {

 

                        echo "Stream " . $id . " closes at " . date('h:i:s') . ".<br>   ";

                        fclose($r);

                        unset($sockets[$id]);

                    } else {

                        $result[$id] = $data;

                    }

                }

            } else {

                /* A time-out means that *all* streams have failed

                  to receive a response. */

                echo "Time-out!\n";

                break;

            }

        }

 

        print_r($result);

    }

3、通过多进程代替多线程

function daemon($func_name,$args,$number){
	while(true){
		$pid=pcntl_fork();
		if($pid==-1){
			echo "fork process fail";
			exit();
		}elseif($pid){//创建的子进程

			static $num=0;
			$num++;
			if($num>=$number){
				//当进程数量达到一定数量时候，就对子进程进行回收。
				pcntl_wait($status);

				$num--;
			}

		}else{ //为0 则代表是子进程创建的，则直接进入工作状态

			if(function_exists($func_name)){
				while (true) {
					$ppid=posix_getpid();
					var_dump($ppid);
					call_user_func_array($func_name,$args);
					sleep(2);
				}
			}else{
				echo "function is not exists";
			}
			exit();


		}
	}
}

function worker($args){

	//do something

}

daemon('worker',array(1),2);