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。

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;
}

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);
}

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);
Loading Disqus comments...
Table of Contents