PHP 8 introduced support for Attributes: https://www.php.net/manual/en/language.attributes.overview.php

Pygments currently treats attributes as a comment, so they look like this:

<?php

#[Route('/blog', name: 'blog_', requirements: ['_locale' => 'en|es|fr'])]
final class IndexController extends AbstractController
{

Rather than this (IntelliJ):