Three ways to implement multithreading in PHP

This article mainly introduces three methods of implementing multi-threading in PHP. Interested friends can refer to it. I hope it will be helpful to everyone.

1. curl_multi method

When multi-threading is needed, curl_multi can be used to request multiple operations at one time, but curl uses network communication, which is more efficient. The reliability is relatively poor.

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. Through stream_socket_client method

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 " . $id . " closes at " . date('h:i:s') . ".
  "; 
            fclose($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. Through multi-process instead of multi-thread

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);

Summary: The above is The entire content of this article is hoped to be helpful to everyone's study.

Related recommendations:

Methods and examples of making template engines in PHP

PHP uses the Mysqli class library to achieve paging effects Method and example analysis

About how PHP uses tokens to prevent repeated submission of forms

The above is the detailed content of Three ways to implement multithreading in PHP. For more information, please follow other related articles on the PHP Chinese website!