关于gatewayworker中使用redis

                global $redis;
                $room_id = $message_data['room_id'];
                $user_list = Gateway::getUidListByGroup($room_id);
                var_dump('在线人');
                var_dump($user_list);
                $redis->zRange('R:r_'.$room_id.':room_user_list',0,-1,  function ($result,$redis)use($user_list,$room_id) {
                    var_dump('redis在线人');
                    var_dump($result);
                    $user_list = array_values($user_list);
                });