我怎样才能获得current_link id？

Question

我正在使用laravel 5.2。我想获取current_link的ID。请帮我找到current_link的id。

public function checkUrl（）{

        $current_link = $_SERVER['REQUEST_URI'];

        $current_link=ltrim($current_link, '/');

        $current_link=ltrim($current_link, 'cable');

        $current_link=ltrim($current_link, '/');

        $plink = DB::table('roles')->where('id',$current_link->id)->get();

        // print_r($plink);
        // die();

         $dlink= DB::table('my_roles')->where('role_id',$current_link->role_id)->get();


       if($plink!=$dlink){
             Session::flash('flash_notification', array('level' => 'success', 'message' => 'Error!! You dont have the permission to access this page'));
             return Redirect::action('Admin\DashboardController@index');
          }

    }