The AllowDynamicProperties attribute

Вступ

This attribute is used to mark classes that allow dynamic properties.

Зауваження:

Although attributes themselves are not inherited, the effect of the AllowDynamicProperties attribute is inherited. Child classes of a class marked with this attribute will also allow dynamic properties, even if they do not explicitly declare the attribute.

Зауваження:

This attribute was introduced in PHP 8.2.0 as the explicit way to allow dynamic properties. Creating a dynamic property on a class that does not use this attribute, and that does not implement __get() or __set(), is deprecated.

Короткий огляд класу

Приклади

<?php
#[\AllowDynamicProperties]
class ValidExample { }

$obj = new ValidExample();
$obj->myDynamicProp = 1234;
?>

<?php
class InvalidExample { }

$obj = new InvalidExample();
$obj->myUnknownProperty = 1234;
?>

Deprecated: Creation of dynamic property InvalidExample::$myUnknownProperty is deprecated in file on line 5

<?php
class DefaultBehaviour { }

#[\AllowDynamicProperties]
class ClassAllowsDynamicProperties { }

class InheritedClassAllowsDynamicProperties extends ClassAllowsDynamicProperties { }

$o1 = new DefaultBehaviour();
$o2 = new InheritedClassAllowsDynamicProperties();

$o1->nonExistingProp = true;
$o2->nonExistingProp = true;
?>

Deprecated: Creation of dynamic property DefaultBehaviour::$nonExistingProp is deprecated in file on line 12

Прогляньте також

Attributes overview