The Override attribute

(PHP 8 >= 8.3.0)

Introduction

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

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

Class synopsis

final class Override {

/* Methods */

public __construct()

}

Examples

<?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

The magic method __construct() can't be marked with Override attribute.

For example:

class Base {
    public $val;
    public function __construct() {
        $this->val = 0;
    }
}

class Derived extends Base {
    #[\Override]
    public function __construct() {
        parent::__construct();
        ++$this->val;
    }
}

In PHP 8.3 this example raises an error message

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

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The Override attribute

Introduction

Class synopsis

Examples

See Also

Table of Contents

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