WebSocket规范的目标是在浏览器中实现和服务器端双向通信。双向通信可以拓展浏览器上的应用类型，如果你想要用PHP来写websocket应用，那swoole_framework一定是最好的选择,需要的朋友可以参考下

 代码如下: <?php define('DEBUG', 'on'); define("WEBPATH", str_replace("","/", __DIR__)); require __DIR__ . '/../libs/lib_config.php';   class WebSocket extends SwooleNetworkProtocolWebSocket {     /**      * 下线时，通知所有人      */     function onClose($serv, $client_id, $from_id)     {         //将下线消息发送给所有人         //$this->log("onOffline: " . $client_id);         //$this->broadcast($client_id, "onOffline: " . $client_id);         parent::onClose($serv, $client_id, $from_id);     }       /**      * 接收到消息时      * @see WSProtocol::onMessage()      */     function onMessage($client_id, $ws)     {         $this->log("onMessage: ".$client_id.' = '.$ws['message']);         $this->send($client_id, "Server: ".$ws['message']);   //$this->broadcast($client_id, $ws['message']);     }       function broadcast($client_id, $msg)     {         foreach ($this->connections as $clid => $info)         {             if ($client_id != $clid)             {                 $this->send($clid, $msg);             }         }     } }     $AppSvr = new WebSocket(); $AppSvr->loadSetting(__DIR__."/swoole.ini"); //加载配置文件 $AppSvr->setLogger(new SwooleLogEchoLog(true)); //Logger   $server = new SwooleNetworkServer('0.0.0.0', 9503); $server->setProtocol($AppSvr); //$server->daemonize(); //作为守护进程 $server->run(array('worker_num' =>4));