framework/web/Controller.php
public function refresh($anchor = '')
    {
        return Yii::$app->getResponse()->redirect(Yii::$app->getRequest()->getUrl() . $anchor);
    }
public function refresh($anchor = '')
    {
        return Yii::$app->getResponse()->redirect(Yii::$app->getRequest()->getUrl() . $anchor);
    }
Refreshes the current page.
This method is a shortcut to [[Response::refresh()]].

You can use it in an action by returning the [[Response]] directly:

```php
// stop executing this action and refresh the current page
return $this->refresh();
```

@param string $anchor the anchor that should be appended to the redirection URL.
Defaults to empty. Make sure the anchor starts with '#' if you want to specify it.
@return Response the response object itself