PHP でマルチスレッドを実現する 3 つの同様の方法

1.curl_multiメソッド

マルチスレッドが必要な場合、curl_multiを使用して一度に複数の操作をリクエストできますが、curlはネットワーク通信を使用するため、効率と信頼性が比較的低くなります。

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. stream_socket_client メソッドを使用する

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 " . $id . " closes at " . date(&#39;h:i:s&#39;) . ".<br>  ";
            fclose($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. マルチプロセスを使用してマルチスレッドを置き換える

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);

上記は、マルチスレッドを実装する 3 つの方法です。 PHP でのスレッド化この方法が皆さんの勉強に役立つことを願っています。

PHP でマルチスレッドを実装する 3 つの同様の方法に関するその他の関連記事については、PHP 中国語 Web サイトに注目してください。