application/core/manage/logic/MemberLogic.php
public function getUser($user_id)
    {
        if (empty(self::$users[$user_id])) {
            self::$users[$user_id] = $this->model->get($user_id);
        }
        return self::$users[$user_id];
    }
public function getUser($user_id)
    {
        if (empty(self::$users[$user_id])) {
            self::$users[$user_id] = $this->model->get($user_id);
        }
        return self::$users[$user_id];
    }
获取用户

@param number $user_id
@return array