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

final class Demo
{
    private function doSomething($values): void
    {
        $values[array_key_last($values)]['label']['show'] = true;
    }
}

Config rector.php

<?php

use Rector\Config\RectorConfig;
use Rector\TypeDeclaration\Rector\Property\TypedPropertyFromAssignsRector;
use Rector\ValueObject\PhpVersion;

return RectorConfig::configure()
    ->withPhpSets(php85: true)
    ->withTypeCoverageLevel(10)
    ->withDeadCodeLevel(10)
    ->withCodeQualityLevel(10);

Rector version: 2.3.1 - released at 2026-01-13 14:52