php composer.phar require --prefer-dist troy/yii2-image-upload ""

"troy/yii2-image-upload": ""

 class SiteController extends Controller
  {
      public function actions()
      {
          return [
              'upload' => [
                  'class' => 'troy\ImageUpload\UploadAction',
                  'successCallback' => [$this, 'successCallback'],
                  'beforeStoreCallback' => [$this,'beforeStoreCallback']
              ],
          ]
      }
 
      public function successCallback($store,$file)
      {
      }
      public function beforeStoreCallback($file)
      {
      }
  }