- cmd 创建模型 ````必须在build同一级目录下才能创建 php think make:model api/BarannerIime ````  ```` //闭包 public function test($id=5) { $result = Db::table('banner_item') ->where(function ($query) use ($id){ $query->where('banner_id','=',$id); }) ->select(); return $result; }