Yii2 sort

function actionIndex()
  {
      $sort = new Sort([
          'attributes' => [
              'age',
              'name' => [
                  'asc' => ['first_name' => SORT_ASC, 'last_name' => SORT_ASC],
                  'desc' => ['first_name' => SORT_DESC, 'last_name' => SORT_DESC],
                  'default' => SORT_DESC,
                  'label' => 'Name',
              ],
          ],
      ]);

      $models = Article::find()
          ->where(['status' => 1])
          ->orderBy($sort->orders)
          ->all();

      return $this->render('index', [
           'models' => $models,
           'sort' => $sort,
      ]);
  }

 View:

 echo $sort->link('name') . ' | ' . $sort->link('age');

 foreach ($models as $model) {
     // display $model here
 }