# The AllowDynamicProperties class

(PHP 8 >= 8.2.0)

## Introducción

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

## Sinopsis de la Clase

final class AllowDynamicProperties {
/* Métodos */
public __construct()
}

## Ejemplos

Dynamic properties are deprecated as of PHP 8.2.0, thus using them without marking the class with this attribute will emit a deprecation notice.

`<?php
class DefaultBehaviour { }
#[\AllowDynamicProperties]
class ClassAllowsDynamicProperties { }
$o1 = new DefaultBehaviour();
$o2 = new ClassAllowsDynamicProperties();
$o1->nonExistingProp = true;
$o2->nonExistingProp = true;
?>`

Output of the above example in PHP 8.2:

    Deprecated: Creation of dynamic property DefaultBehaviour::$nonExistingProp is deprecated in file on line 10

## Ver también

Attributes overview

## Tabla de contenidos

- AllowDynamicProperties::__construct — Construct a new AllowDynamicProperties attribute instance