public function actionAddChild() { $parent_id = Yii::$app->request->post('parent_id'); $category_name = Yii::$app->request->post('node_name'); $category_type_id = Yii::$app->request->post('cur_cat_type_id'); if (Yii::$app->getRequest()->isAjax && $parent_id && $category_name && $category_type_id) { return Categories::addChildCategory($parent_id, $category_name, $category_type_id); } }