php实现类多线程的方法总结

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。

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;        } 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);      } 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($args){      //do something   }  daemon('worker',array(1),2); function daemon($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);