php三種實現多線程類似的方法

1、curl_multi方法

當需要多線程的時候，可以用curl_multi一次性請求多個操作來完成，但curl走的是網路通訊，效率與可靠性就比較差了的。

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 架構格式      foreach ($data as $k => $v) {         if ($k % 2 == 0) { //偶數發一個網址          $send_data[$k]['url'] = '';          $send_data[$k]['body'] = $v['waybill_id'];        } else { //奇數發送另外一個網址        $send_data[$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、通過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、通過多進程代替多線程

function daemon($func_name,$args,$number){  while(true){    $pid=pcntl_fork();    if($pid==-1){      echo "fork process fail";      exit();    }elseif($pid){//建立的子進程        static $num=0;      $num++;      if($num>=$number){        //當進程數量達到一定數量時候，就對子進程進行回收。        pcntl_wait($status);          $num--;      }     }else{ //為0 則代表是子進程建立的，則直接進入工作狀態        if(function_exists($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);

以上就是為大家分享的三種php實現多線程類似的方法，希望對大家的學習有所協助。