function getUser($id) { if (Session::is_set('user')) { $user = Session::get('user'); return $user[$id]; } import('@.Dao.UserDao'); $dao = new UserDao(); $userList = $dao->field('id,name,nickname')->findAll(); $user = $userList->getCol('id,name'); $name = $user[$id]; Session::set('user', $user); return $name; }