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[PHP 8.3] Mention readonly props reset in __clone() #4172

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Merged
Girgias merged 2 commits into from
Nov 27, 2024
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[PHP 8.3] Mention readonly props reset in __clone() #4172

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Mention readonly props reset in `__clone()`
alexandre-daubois Nov 27, 2024
2d956fa
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Girgias Nov 27, 2024
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30 changes: 30 additions & 0 deletions language/oop5/properties.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -330,6 +330,36 @@ $test->obj = new stdClass;
</programlisting>
</informalexample>
</para>
<para>
As of PHP 8.3.0, readonly properties can be reinitialized when cloning an object
using the <link linkend="object.clone">__clone()</link> method.
<example>
<title>Readonly properties and cloning</title>
<programlisting role="php">
<![CDATA[
<?php
class Test1 {
public readonly ?string $prop;

public function __clone() {
$this->prop = null;
}

public function setProp(string $prop): void {
$this->prop = $prop;
}
}

$test1 = new Test1;
$test1->setProp('foobar');

$test2 = clone $test1;
var_dump($test2->prop); // NULL
?>
]]>
</programlisting>
</example>
</para>
</sect2>

<sect2 xml:id="language.oop5.properties.dynamic-properties">
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