thinkPHP

public function getGroups($uid) {

        static $groups = array();

        if (isset($groups[$uid]))

            return $groups[$uid];

        $user_groups = M()

            ->table($this->_config['AUTH_GROUP_ACCESS'] . ' a')

            ->where("a.uid='$uid' and g.status='1'")

            ->join($this->_config['AUTH_GROUP']." g on a.group_id=g.id")

            ->field('uid,group_id,title,rules')->select();

        $groups[$uid]=$user_groups?:array();

        return $groups[$uid];

    }