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:

// no change

PHP snippet to change

<?php

namespace App;

final class DemoFile
{
    public \App\DemoFile $d;
}

Config rector.php

<?php

use Rector\Config\RectorConfig;

return RectorConfig::configure()
    ->withPreparedSets(typeDeclarations: true)
    ->withImportNames();

Rector version: 40ef51 - released at 2026-05-13 09:01