Fixes #9915: yii\helpers\ArrayHelper::getValue() was erroring instead of returning null for non-existing object properties

framework/CHANGELOG.md

@@ -24,6 +24,7 @@ Yii Framework 2 Change Log
 - Bug #9874: Fixed outputting exception stacktrace in non-debug mode when `Response::FORMAT_RAW` is used (nainoon)
 - Bug #9883: Passing a single `yii\db\Expression` to `Query::select()` or `::addSelect()` was not handled correctly in all cases (cebe)
 - Bug #9911: Fixed `yii\helpers\BaseStringHelper::explode()` code so it does not remove items eq to 0 with skip_empty attribute (silverfire, kidol)
+- Bug #9915: `yii\helpers\ArrayHelper::getValue()` was erroring instead of returning `null` for non-existing object properties (totaldev, samdark)
 - Bug: Fixed generation of canonical URLs for `ViewAction` pages (samdark)
 - Enh #7581: Added ability to specify range using anonymous function in `RangeValidator` (RomeroMsk)
 - Enh #8613: `yii\widgets\FragmentCache` will not store empty content anymore which fixes some problems related to `yii\filters\PageCache` (kidol)

framework/helpers/BaseArrayHelper.php

@@ -198,7 +198,7 @@ class BaseArrayHelper
             $key = substr($key, $pos + 1);
         }
 
-        if (is_object($array)) {
+        if (is_object($array) && isset($array->$key)) {
             return $array->$key;
         } elseif (is_array($array)) {
             return array_key_exists($key, $array) ? $array[$key] : $default;