public function start()
{
  $this->lock = new swoole_lock(SWOOLE_MUTEX);　　　　　　　　　　　　

  // 对文件或数组进行锁操作，已达到同步
  $this->server = new swoole_websocket_server($this->addr, $this->port);　　

  // swoole提供的Websocket Server
  $this->server->set(array(
   'daemonize' => 0,
   'worker_num' => 4,
   'task_worker_num' => 10,
   'max_request' => 1000,
   'log_file' => ROOT_PATH . 'storage\\logs\\swoole.log'  

  // swoole日志路径，必须是绝对路径
  ));

  $this->server->on('open', array($this, 'onOpen'));
  $this->server->on('message', array($this, 'onMessage'));
  $this->server->on('task', array($this, 'onTask'));
  $this->server->on('finish', array($this, 'onFinish'));
  $this->server->on('close', array($this, 'onClose'));

　　 // 启动服务
  $this->server->start();
}

public function onOpen($server, $request)
  {
   $message = array(
    'remote_addr' => $request->server['remote_addr'],
    'request_time' => date('Y-m-d H:i:s', $request->server['request_time'])
   );
   write_log($message);
  }

public function onMessage($server, $frame)
  {
   $data = json_decode($frame->data);

   switch ($data->type) {
    case 'init':
    case 'INIT':
     $this->users[$frame->fd] = $data->message;　　、

   // 记录每个链接的信息，同样不要尝试打印出来看，因为你只能看到自己的链接信息
     $message = '欢迎' . $data->message . '加入了聊天室';
     $response = array(
      'type' => 1, // 1代表系统消息，2代表用户聊天
      'message' => $message
     );
     break;
    case 'chat':
    case 'CHAT':
     $message = $data->message;
     $response = array(
      'type' => 2, // 1代表系统消息，2代表用户聊天
      'username' => $this->users[$frame->fd],
      'message' => $message
     );
     break;
    default:
     return false;
   }
　　　　　　　　
　　　　　　　// 将信息交给task处理
   $this->server->task($response);
  }

  public function onTask($server, $task_id, $from_id, $message)
  {
　　　　　　　// 迭代所有的客户端链接，将消息推送过去。（如果你尝试将 $this->server->connections 打印出来，那么你会发现他是空的。但当时用 foreach 去循环时，它确实有用。）
   foreach ($this->server->connections as $fd) {
    $this->server->push($fd, json_encode($message));
   }
   $server->finish( 'Task' . $task_id . 'Finished' . PHP_EOL);
  }

public function onClose($server, $fd)
  {
   $username = $this->users[$fd];
   // 释放客户端，利用锁进行同步
   $this->lock->lock();
   unset($this->users[$fd]);
   $this->lock->unlock();

   if( $username ) {
    $response = array(
     'type' => 1, // 1代表系统消息，2代表用户聊天
     'message' => $username . '离开了聊天室'
    );
    $this->server->task($response);
   }


   write_log( $fd . ' disconnected');
  }

// websocket
  let address = 'ws://<"ui-border-tb"><span class="username">系统消息:</span><span class="message">' + data.message + '</span></li>');
   } else if (data.type == 2) {
    $('#chat-list2').append('<li class="ui-border-tb"><span class="username">' + data.username + ':</span><span class="message">' + data.message + '</span></li>');
   }

  };
  webSocket.onclose = function (event) {
   alert('散了吧，服务器都关了');
  };