> For the complete documentation index, see [llms.txt](https://senselab.gitbook.io/senselab-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://senselab.gitbook.io/senselab-docs/vendor/symfony/event-dispatcher/changelog.md).

# CHANGELOG

## 6.0

* Remove `LegacyEventDispatcherProxy`

## 5.4

* Allow `#[AsEventListener]` attribute on methods

## 5.3

* Add `#[AsEventListener]` attribute for declaring listeners on PHP 8

## 5.1.0

* The `LegacyEventDispatcherProxy` class has been deprecated.
* Added an optional `dispatcher` attribute to the listener and subscriber tags in `RegisterListenerPass`.

## 5.0.0

* The signature of the `EventDispatcherInterface::dispatch()` method has been changed to `dispatch($event, string $eventName = null): object`.
* The `Event` class has been removed in favor of `Symfony\Contracts\EventDispatcher\Event`.
* The `TraceableEventDispatcherInterface` has been removed.
* The `WrappedListener` class is now final.

## 4.4.0

* `AddEventAliasesPass` has been added, allowing applications and bundles to extend the event alias mapping used by `RegisterListenersPass`.
* Made the `event` attribute of the `kernel.event_listener` tag optional for FQCN events.

## 4.3.0

* The signature of the `EventDispatcherInterface::dispatch()` method should be updated to `dispatch($event, string $eventName = null)`, not doing so is deprecated
* deprecated the `Event` class, use `Symfony\Contracts\EventDispatcher\Event` instead

## 4.1.0

* added support for invokable event listeners tagged with `kernel.event_listener` by default
* The `TraceableEventDispatcher::getOrphanedEvents()` method has been added.
* The `TraceableEventDispatcherInterface` has been deprecated.

## 4.0.0

* removed the `ContainerAwareEventDispatcher` class
* added the `reset()` method to the `TraceableEventDispatcherInterface`

## 3.4.0

* Implementing `TraceableEventDispatcherInterface` without the `reset()` method has been deprecated.

## 3.3.0

* The ContainerAwareEventDispatcher class has been deprecated. Use EventDispatcher with closure factories instead.

## 3.0.0

* The method `getListenerPriority($eventName, $listener)` has been added to the `EventDispatcherInterface`.
* The methods `Event::setDispatcher()`, `Event::getDispatcher()`, `Event::setName()` and `Event::getName()` have been removed. The event dispatcher and the event name are passed to the listener call.

## 2.5.0

* added Debug\TraceableEventDispatcher (originally in HttpKernel)
* changed Debug\TraceableEventDispatcherInterface to extend EventDispatcherInterface
* added RegisterListenersPass (originally in HttpKernel)

## 2.1.0

* added TraceableEventDispatcherInterface
* added ContainerAwareEventDispatcher
* added a reference to the EventDispatcher on the Event
* added a reference to the Event name on the event
* added fluid interface to the dispatch() method which now returns the Event object
* added GenericEvent event class
* added the possibility for subscribers to subscribe several times for the same event
* added ImmutableEventDispatcher


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