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

class test
{
    private function a(): int
    {
        return 1;
    }

    public static function b(): void
    {
        self::a();
    }
}

test::b();

Config rector.php

<?php

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

return RectorConfig::configure()
    // A. whole set
    ->withPreparedSets(typeDeclarations: true)
    // demonstrate specific PHP version
    ->withPhpVersion(PhpVersion::PHP_80)
    ->withSets([
        \Rector\Set\ValueObject\SetList::PHP_70,
        \Rector\Set\ValueObject\SetList::PHP_71,
        \Rector\Set\ValueObject\SetList::PHP_72,
        \Rector\Set\ValueObject\SetList::PHP_73,
        \Rector\Set\ValueObject\SetList::PHP_74,
        \Rector\Set\ValueObject\SetList::PHP_80
    ]);

Rector version: 6d8bee - released at 2026-05-04 23:43