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<?xml version="1.0" encoding="utf-8"?>
<reference xml:id="class.allowdynamicproperties" role="class" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xi="http://www.w3.org/2001/XInclude">
<title>The AllowDynamicProperties attribute</title>
<titleabbrev>AllowDynamicProperties</titleabbrev>
<partintro>
<section xml:id="allowdynamicproperties.intro">
&reftitle.intro;
<para>
This attribute is used to mark classes that allow
<link linkend="language.oop5.properties.dynamic-properties">dynamic properties</link>.
</para>
</section>
<section xml:id="allowdynamicproperties.synopsis">
&reftitle.classsynopsis;
<classsynopsis class="class">
<ooclass>
<modifier>final</modifier>
<classname>AllowDynamicProperties</classname>
</ooclass>
<classsynopsisinfo role="comment">&Methods;</classsynopsisinfo>
<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('class.allowdynamicproperties')/db:refentry/db:refsect1[@role='description']/descendant::db:constructorsynopsis[@role='AllowDynamicProperties'])">
<xi:fallback/>
</xi:include>
</classsynopsis>
</section>
<section>
&reftitle.examples;
<para>
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.
</para>
<informalexample>
<programlisting role="php">
<![CDATA[
<?php
class DefaultBehaviour { }
#[\AllowDynamicProperties]
class ClassAllowsDynamicProperties { }
$o1 = new DefaultBehaviour();
$o2 = new ClassAllowsDynamicProperties();
$o1->nonExistingProp = true;
$o2->nonExistingProp = true;
?>
]]>
</programlisting>
&example.outputs.82;
<screen>
<![CDATA[
Deprecated: Creation of dynamic property DefaultBehaviour::$nonExistingProp is deprecated in file on line 10
]]>
</screen>
</informalexample>
</section>
<section xml:id="allowdynamicproperties.seealso">
&reftitle.seealso;
<para><link linkend="language.attributes">Attributes overview</link></para>
</section>
</partintro>
&language.predefined.allowdynamicproperties.construct;
</reference>
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