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:

 
 class Child extends CParent
 {
-    public function __destruct()
+    public function __destruct(): void
     {}
 }

PHP snippet to change

<?php

class CParent
{
    public function __destruct()
    {}
}

class Child extends CParent
{
    public function __destruct()
    {}
}

Applied Rules:

AddReturnTypeDeclarationBasedOnParentClassMethodRector

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\TypeDeclaration\Rector\Property\TypedPropertyFromAssignsRector;

return RectorConfig::configure()
    // A. whole set
    ->withPreparedSets(typeDeclarations: true)
    // B. or few rules
    ->withRules([
        TypedPropertyFromAssignsRector::class
    ]);

Rector version: efe86c - released at 2025-09-13 10:07