From 442ac040cc20d4f70e0a6b8056a2cb334a6e0b42 Mon Sep 17 00:00:00 2001
From: Alexander Makarov <sam@rmcreative.ru>
Date: Sat, 14 Jan 2017 13:22:13 +0300
Subject: [PATCH] Used is_subclass_of() as suggested by @SamMousa

https://github.com/yiisoft/yii2/commit/3946ac0dabf3cfce62ed251b89d6b66aa422e3be#commitcomment-20466575
---
 framework/widgets/ActiveField.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/framework/widgets/ActiveField.php b/framework/widgets/ActiveField.php
index 4dc7d061c4f..5bac6799975 100644
--- a/framework/widgets/ActiveField.php
+++ b/framework/widgets/ActiveField.php
@@ -713,7 +713,7 @@ public function widget($class, $config = [])
         $config['model'] = $this->model;
         $config['attribute'] = $this->attribute;
         $config['view'] = $this->form->getView();
-        if (isset(class_parents($class)['yii\widgets\InputWidget'])) {
+        if (is_subclass_of($class, 'yii\widgets\InputWidget')) {
             $config['field'] = $this;
             if (isset($config['options'])) {
                 $this->addAriaAttributes($config['options']);