ProfilerSubscriber.php

<?php

declare(strict_types=1);

namespace App;

use Symfony\Component\DependencyInjection\Attribute\Autowire;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpKernel\Event\ResponseEvent;

/**
 * Can be deleted with Symfony 7.3, see https://github.com/symfony/symfony/pull/59123.
 */
final class ProfilerSubscriber implements EventSubscriberInterface
{
    public function __construct(
        #[Autowire('kernel.debug')]
        private readonly bool $debug,
    ) {
    }

    public static function getSubscribedEvents(): array
    {
        return [
            ResponseEvent::class => 'onKernelResponse',
        ];
    }

    public function onKernelResponse(ResponseEvent $event): void
    {
        if (!$this->debug && !$event->isMainRequest()) {
            return;
        }

        $request = $event->getRequest();
        if (!$request->isXmlHttpRequest()) {
            return;
        }

        $response = $event->getResponse();
        $response->headers->set('Symfony-Debug-Toolbar-Replace', '1');
    }
}