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@ -342,11 +342,11 @@ by calling `validateValue()`.
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### Handling Empty Inputs <a name="handling-empty-inputs"></a> |
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Validators often need to check if an input is empty or not. You may call [[yii\validators\Validator::isEmpty()]] |
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Validators often need to check if an input is empty or not. In your validator, you may call [[yii\validators\Validator::isEmpty()]] |
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to perform this check. By default, this method will return true if a value is an empty string, an empty array or null. |
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Users of validators can customize the default empty detection logic by configuring |
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the [[yii\validators\Validator::isEmpty]] property. For example, |
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the [[yii\validators\Validator::isEmpty]] property with a PHP callable. For example, |
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```php |
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[ |
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@ -356,6 +356,16 @@ the [[yii\validators\Validator::isEmpty]] property. For example,
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] |
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``` |
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When input data are submitted from HTML forms, you often need to assign some default values to the inputs |
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if they are empty. You can do so by using the [default](tutorial-core-validators.md#default) validator. For example, |
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```php |
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[ |
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// set "level" to be 1 if it is empty |
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['level', 'default', 'value' => 1], |
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] |
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``` |
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## Client-Side Validation <a name="client-side-validation"></a> |
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