Revert "Fix #19668: Fix Error null check PHP 8.1 yii\validators\FilterValidator"

This reverts commit d056c7f209c3e14c36959225383b0ca4aaaf171f.

Author: samdark

CHANGELOG.md

@@ -17,7 +17,6 @@ Yii Framework 2 Change Log
 - Bug #19316: Fix MysqlMutex with same connection but difference database (kamarton)
 - Bug #19507: Fix eager loading of nested one-to-many relations (spo0okie)
 - Bug #19546: Reverted #19309 (bizley)
-- Bug #19668: Fix Error null check PHP 8.1 `yii\validators\FilterValidator` (samuelexyz)
 - Bug #19670: Fix Error null check PHP 8.1 `yii\rbac\DbManager` (samuelexyz)
 - Bug #19520: Fix for TIMESTAMP & ROWVERSION columns in MSSQL insert query (darkdef)
 - Bug #19581: Fix regression in `CompositeAuth` introduced in #19418 (SamMousa, WinterSilence, samdark)

validators/FilterValidator.php

@@ -77,7 +77,7 @@ public function init()
     public function validateAttribute($model, $attribute)
     {
         $value = $model->$attribute;
-        if ((!$this->skipOnArray || !is_array($value)) && $value) {
+        if (!$this->skipOnArray || !is_array($value)) {
             $model->$attribute = call_user_func($this->filter, $value);
         }
     }