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40 lines
836 B
Markdown
40 lines
836 B
Markdown
# KeyNested
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- `v::keyNested(string $name)`
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- `v::keyNested(string $name, v $validator)`
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- `v::keyNested(string $name, v $validator, boolean $mandatory = true)`
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Validates an array key or an object property using `.` to represent nested data.
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Validating keys from arrays or `ArrayAccess` instances:
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```php
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$array = [
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'foo' => [
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'bar' => 123,
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],
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];
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v::keyNested('foo.bar')->validate($array); // true
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```
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Validating object properties:
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```php
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$object = new stdClass();
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$object->foo = new stdClass();
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$object->foo->bar = 42;
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v::keyNested('foo.bar')->validate($object); // true
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```
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This rule was inspired by [Yii2 ArrayHelper][].
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***
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See also:
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* [Attribute](Attribute.md)
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* [Key](Key.md)
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[Yii2 ArrayHelper]: https://github.com/yiisoft/yii2/blob/68c30c1/framework/helpers/BaseArrayHelper.php "Yii2 ArrayHelper"
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