Try Rector Online | Rector - Automated Way to Instantly Upgrade and Refactor any PHP code

Run Rector on your code to see what it can do for you:

 <?php
 
 class MyClassA implements \Countable

 
 class MyClassB implements \Countable, \Stringable
 {
+    #[\Override]
     public function count(): int
     {
         return 0;
     }
     
+    #[\Override]
     public function __toString(): string
     {
         return 'hello';
     }
 }

PHP snippet to change

<?php

class MyClassA implements \Countable
{
    public function count(): int
    {
        return 0;
    }
}

class MyClassB implements \Countable, \Stringable
{
    public function count(): int
    {
        return 0;
    }
    
    public function __toString(): string
    {
        return 'hello';
    }
}

Applied Rules:

AddOverrideAttributeToOverriddenMethodsRector

Not a change you expect?

Create an issue on GitHub
...or to speed up fix – add a test fixture

Config rector.php

<?php

use Rector\Config\RectorConfig;
use Rector\ValueObject\PhpVersion;
use Rector\Php83\Rector\ClassMethod\AddOverrideAttributeToOverriddenMethodsRector;

return RectorConfig::configure()
    ->withConfiguredRule(AddOverrideAttributeToOverriddenMethodsRector::class, [
        AddOverrideAttributeToOverriddenMethodsRector::ALLOW_OVERRIDE_EMPTY_METHOD => true,
    ])
    ->withPhpVersion(PhpVersion::PHP_84);

Rector version: 3a3942 - released at 2026-03-17 17:46