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

use PHPUnit\Framework\TestCase;

final class DemoFile extends TestCase
{
    public function testIsHeaderLine(string $line, bool $expected): void
    {
        $this->assertEquals($expected, $this->returnsBool($line));
    }
    
    public function returnsBool(): bool {
        return rand(0,1) ? true : false;
    }
}

Config rector.php

<?php

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

return RectorConfig::configure()
    ->withPreparedSets(phpunitCodeQuality: true)
;

Rector version: 2.3.8 - released at 2026-02-22 00:49