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:

 {
     public function run(bool $param)
     {
-        $constraints = new Assert\Collection([
-            'example1' => [new Assert\NotBlank(), new Assert\Type('string')],
-            'example2' => [new Assert\Type('string')],
-            'example3' => [new Assert\NotBlank(), new Assert\Type('string')],
-            'example4' => [new Assert\NotBlank(), new Assert\Type('string')],
-        ], allowExtraFields: false);
+        $constraints = new Assert\Collection(example1: [new Assert\NotBlank(), new Assert\Type('string')], example2: [new Assert\Type('string')], example3: [new Assert\NotBlank(), new Assert\Type('string')], example4: [new Assert\NotBlank(), new Assert\Type('string')]);
     }
 }

PHP snippet to change

<?php

use Symfony\Component\Validator\Constraints as Assert;

final class DemoFile
{
    public function run(bool $param)
    {
        $constraints = new Assert\Collection([
            'example1' => [new Assert\NotBlank(), new Assert\Type('string')],
            'example2' => [new Assert\Type('string')],
            'example3' => [new Assert\NotBlank(), new Assert\Type('string')],
            'example4' => [new Assert\NotBlank(), new Assert\Type('string')],
        ], allowExtraFields: false);
    }
}

Applied Rules:

ConstraintOptionsToNamedArgumentsRector

Not a change you expect?

Create an issue on GitHub
...or to speed up fix – add a test fixture

Config rector.php

<?php

use Rector\Config\RectorConfig;
use Rector\ValueObject\PhpVersion;

return RectorConfig::configure()
    ->withRules([
        Rector\Symfony\Symfony73\Rector\Class_\ConstraintOptionsToNamedArgumentsRector::class
    ])
    // demonstrate specific PHP version
    ->withPhpVersion(PhpVersion::PHP_84);

Rector version: 2.4.2 - released at 2026-04-16 14:00