File::isDirectory PHP Method

        public static function isDirectory($directory)
        {
            return \Illuminate\Filesystem\Filesystem::isDirectory($directory);
        }

 public static function uploadImage($user_id)
 {
     $error_code = ApiResponse::OK;
     if (User::where('user_id', $user_id)->first()) {
         $profile = Profile::where('user_id', $user_id)->first();
         if (Input::hasFile('file')) {
             $file = Input::file('file');
             $destinationPath = public_path() . '/images/' . $user_id . '/avatar';
             $filename = date('YmdHis') . '_' . $file->getClientOriginalName();
             $extension = $file->getClientOriginalExtension();
             if (!File::isDirectory($destinationPath)) {
                 File::makeDirectory($destinationPath, $mode = 0777, true, true);
             }
             $upload_success = $file->move($destinationPath, $filename);
             $profile->image = 'images/' . $user_id . '/avatar/' . $filename;
             $profile->save();
             $data = URL::asset($profile->image);
         } else {
             $error_code = ApiResponse::MISSING_PARAMS;
             $data = null;
         }
     } else {
         $error_code = ApiResponse::UNAVAILABLE_USER;
         $data = ApiResponse::getErrorContent(ApiResponse::UNAVAILABLE_USER);
     }
     return array("code" => $error_code, "data" => $data);
 }