Wrap "null"
@ -231,7 +231,7 @@ return [
];
```
By default, an input is considered empty if its value is an empty string, an empty array or a null.
By default, an input is considered empty if its value is an empty string, an empty array or a `null`.
You may customize the default empty detection logic by configuring the [[yii\validators\Validator::isEmpty]] property
with a PHP callable. For example,