DcatAdmin開發集錦（2）：屏蔽OSS找不到檔案錯誤

$id = \request('article');
      if($id){$res = Article::find($id);
      if($res->photo != ''){
        $handle= @fopen('http://static.abc.com/'.$res->photo,'r');
          if (!$handle) {
              $res->photo = null;
              $res->save();
          }
      }
    }