public function quitAction()
{
$rid = trim($_POST['rid']);
$roomModel = new RoomModel();
$room = $roomModel->getRoomById($rid);
$userlist = json_decode($room['user_list'], true);
$userlist = $userlist ? $userlist : array();
if (!isset($userlist[$this->uid])) {
$this->echoJson(true, $rid);
} else {
$res = $roomModel->removeUser($rid, $userlist, $this->uid);
if ($res) {
$this->echoJson(true, $rid);
} else {
$this->echoJson(false, "db fail");
}
}
}
