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The Override attribute

Introduction

(PHP 8 >= 8.3.0)

This attribute is used to indicate that a method or a property is intended to override a method or a property of a parent class or that it implements a method or a property defined in an interface.

If no method or property with the same name exists in a parent class or in an implemented interface a compile-time error will be emitted.

The attribute cannot be used on the __construct() method, which is exempt from signature checks.

Class synopsis

final class Override {

/* Methods */

public __construct()

}

Changelog

Version	Description
8.5.0	Override can be applied to properties.

Examples

Example #1 Usage with methods

<?php

class Base {
    protected function foo(): void {}
}

final class Extended extends Base {
    #[\Override]
    protected function boo(): void {}
}

?>

Output of the above example in PHP 8.3 is similar to:

Fatal error: Extended::boo() has #[\Override] attribute, but no matching parent method exists

Example #2 Usage with properties

<?php

class Base {
    protected string $foo;
}

final class Extended extends Base {
    #[\Override]
    protected string $boo;
}

?>

Output of the above example in PHP 8.5 is similar to:

Fatal error: Extended::$boo has #[\Override] attribute, but no matching parent property exists