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Document static asymmetric visibility. #4891

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Document static asymmetric visibility. #4891

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29 changes: 28 additions & 1 deletion language/oop5/visibility.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -79,7 +79,7 @@ $obj2->printHello(); // Shows Public2, Protected2, Undefined
<sect3 xml:id="language.oop5.visibility-members-aviz">
<title>Asymmetric Property Visibility</title>
<simpara>
As of PHP 8.4, properties may also have their
As of PHP 8.4, object properties may also have their
visibility set asymmetrically, with a different scope for
reading (<literal>get</literal>) and writing (<literal>set</literal>).
Specifically, the <literal>set</literal> visibility may be
Expand Down Expand Up @@ -119,6 +119,33 @@ $b->title = 'How not to PHP'; // Fatal Error
$b->author = 'Pedro H. Peterson'; // Fatal Error
$b->pubYear = 2023; // Fatal Error
?>
]]>
</programlisting>
</example>
<simpara>As of PHP 8.5, set visibility may also be applied to static properties of classes.</simpara>
<example>
<title>Asymmetric Property visibility</title>
<programlisting role="php" annotations="non-interactive">
<![CDATA[
<?php
class Manager
{
public private(set) static int $calls = 0;

public doAThing(): string
{
self::$calls++;
// Do other stuff.
return "some string";
}
}

$m = new Manager();

$m->doAThing(); // Works
print Manager::$calls; // Works
Manager::$calls = 5; // Fatal error
?>
]]>
</programlisting>
</example>
Expand Down