<?xml version="1.0"?>
<documentation xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="https://phpcsstandards.github.io/PHPCSDevTools/phpcsdocs.xsd"
title="Static in Final Class"
>
<standard>
<![CDATA[
When a class is declared as final, using the `static` keyword for late static binding is unnecessary and redundant.
This rule also covers using `static` in a comparison with `instanceof`, using `static` for class instantiations or as a return type.
`self` should be used instead.
This applies to final classes, anonymous classes (final by nature) and enums (final by design).
]]>
</standard>
<code_comparison>
<code title="Valid: Using 'self' in a final OO construct.">
<![CDATA[
final class Foo
{
public function myMethod($param) : <em>self</em>
{
$var = <em>self</em>::functionCall();
$var = $obj instanceof <em>self</em>;
$var = new <em>self</em>;
}
}
]]>
</code>
<code title="Invalid: Using 'static' in a final OO construct.">
<![CDATA[
$anon = new class {
public function myMethod(
): int|<em>static</em>|false {
$var = <em>static</em>::$prop;
$var = $obj instanceof <em>static</em>;
$var = new <em>static</em>();
}
};
]]>
</code>
</code_comparison>
</documentation>
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