vendor/symfony/event-dispatcher/EventDispatcherInterface.php line 65
<?php/** This file is part of the Symfony package.** (c) Fabien Potencier <fabien@symfony.com>** For the full copyright and license information, please view the LICENSE* file that was distributed with this source code.*/namespace Symfony\Component\EventDispatcher;use Symfony\Contracts\EventDispatcher\EventDispatcherInterface as ContractsEventDispatcherInterface;/*** The EventDispatcherInterface is the central point of Symfony's event listener system.* Listeners are registered on the manager and events are dispatched through the* manager.** @author Bernhard Schussek <bschussek@gmail.com>*/interface EventDispatcherInterface extends ContractsEventDispatcherInterface{/*** Adds an event listener that listens on the specified events.** @param int $priority The higher this value, the earlier an event* listener will be triggered in the chain (defaults to 0)*/public function addListener(string $eventName, callable $listener, int $priority = 0);/*** Adds an event subscriber.** The subscriber is asked for all the events it is* interested in and added as a listener for these events.*/public function addSubscriber(EventSubscriberInterface $subscriber);/*** Removes an event listener from the specified events.*/public function removeListener(string $eventName, callable $listener);public function removeSubscriber(EventSubscriberInterface $subscriber);/*** Gets the listeners of a specific event or all listeners sorted by descending priority.** @return array<callable[]|callable>*/public function getListeners(string $eventName = null): array;/*** Gets the listener priority for a specific event.** Returns null if the event or the listener does not exist.*/public function getListenerPriority(string $eventName, callable $listener): ?int;/*** Checks whether an event has any registered listeners.*/public function hasListeners(string $eventName = null): bool;}