How to delete a file physically in Yii2?

Question

Yii

Hello! Tell me how to delete a file in Yii2 physically?
Generated a regular KRUD with image loading. The path to the images is stored in the database, and the image itself is stored in the folder. When deleting, only the record in the database is deleted, and the file remains.
Please tell me how to delete the file ...
Delete function

public function actionDelete($id)
    {
        $this->findModel($id)->delete();
        return $this->redirect(['index']);
    }

Answer 1

unlink('/path/to/file');