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 UseDataProviderTest extends TestCase
{
    #[\PHPUnit\Framework\Attributes\DataProvider('dataProvider')]
    public function test(string $val1, string $val2): void
    {
    }
    
    public static function dataProvider(): iterable
	{
        yield from [
            ['value1', 'value2'],
            ['value3', 'value4'],
            ['value5', 'value6'],
            ['value7', 'value8'],
        ];
    }

}

Config rector.php

<?php

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

return RectorConfig::configure()
->withSets([
		\Rector\PHPUnit\Set\PHPUnitSetList::PHPUNIT_CODE_QUALITY,
	])
    // demonstrate specific PHP version
    ->withPhpVersion(PhpVersion::PHP_84);

Rector version: b09565 - released at 2026-05-25 06:37