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[EventDispatcher] [RFC] feat: swap from event constant to event class #20889

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Apr 15, 2025
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[EventDispatcher] [RFC] feat: swap from event constant to event class #20889

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5 changes: 2 additions & 3 deletions event_dispatcher.rst
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Expand Up @@ -246,22 +246,21 @@ methods could be called before or after the methods defined in other listeners
and subscribers. To learn more about event subscribers, read :doc:`/components/event_dispatcher`.

The following example shows an event subscriber that defines several methods which
listen to the same ``kernel.exception`` event::
listen to the same ``kernel.exception`` event which has an ``ExceptionEvent``::

// src/EventSubscriber/ExceptionSubscriber.php
namespace App\EventSubscriber;

use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpKernel\Event\ExceptionEvent;
use Symfony\Component\HttpKernel\KernelEvents;

class ExceptionSubscriber implements EventSubscriberInterface
{
public static function getSubscribedEvents(): array
{
// return the subscribed events, their methods and priorities
return [
KernelEvents::EXCEPTION => [
ExceptionEvent::class => [
['processException', 10],
['logException', 0],
['notifyException', -10],
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