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

$obj = new DemoFile();
var_dump($obj instanceof Stringable);

Config rector.php

<?php

declare(strict_types=1);

use Rector\Config\RectorConfig;
use Rector\Set\ValueObject\DowngradeLevelSetList;

return RectorConfig::configure()
    ->withSets([DowngradeLevelSetList::DOWN_TO_PHP_72]);

Rector version: f5edbf - released at 2025-03-31 16:34