php三种实现多线程类似的方法

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); 

以上就是为大家分享的三种php实现多线程类似的方法，希望对大家的学习有所帮助。