public function getIndex()
 {
     if (Session::get('logininfo')->level == 3) {
         return view('admin.error');
     }
     $data = ads::orderBy('id', 'desc')->get();
     return view("admin.ads.index", array('data' => $data));
 }
 public static function getAds()
 {
     $ads = new ads();
     return $ads->orderBy('type', 'asc')->get();
 }