Interface EventDispatcherInterface

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.

Direct known implementers

Symfony\Component\EventDispatcher\EventDispatcher, Symfony\Component\EventDispatcher\ImmutableEventDispatcher

Indirect known implementers

Symfony\Component\EventDispatcher\ContainerAwareEventDispatcher

Namespace: Symfony\Component\EventDispatcher
Author: Bernhard Schussek <bschussek@gmail.com>
Api
Located at event-dispatcher/Symfony/Component/EventDispatcher/EventDispatcherInterface.php

Methods summary
`public Symfony\Component\EventDispatcher\Event`	# `dispatch( string $eventName, Symfony\Component\EventDispatcher\Event $event = null )` Dispatches an event to all registered listeners. Dispatches an event to all registered listeners. Parameters `$eventName` `string` $eventName The name of the event to dispatch. The name of the event is the name of the method that is invoked on listeners. `$event` `Symfony\Component\EventDispatcher\Event` $event The event to pass to the event handlers/listeners. If not supplied, an empty Event instance is created. Returns `Symfony\Component\EventDispatcher\Event` Api
`public`	# `addListener( string $eventName, callable $listener, integer $priority = 0 )` Adds an event listener that listens on the specified events. Adds an event listener that listens on the specified events. Parameters `$eventName` `string` $eventName The event to listen on `$listener` `callable` $listener The listener `$priority` `integer` $priority The higher this value, the earlier an event listener will be triggered in the chain (defaults to 0) Api
`public`	# `addSubscriber( Symfony\Component\EventDispatcher\EventSubscriberInterface $subscriber )` Adds an event subscriber. Adds an event subscriber. The subscriber is asked for all the events he is interested in and added as a listener for these events. Parameters `$subscriber` `Symfony\Component\EventDispatcher\EventSubscriberInterface` $subscriber The subscriber. Api
`public`	# `removeListener( string\|array $eventName, callable $listener )` Removes an event listener from the specified events. Removes an event listener from the specified events. Parameters `$eventName` `string\|array` $eventName The event(s) to remove a listener from `$listener` `callable` $listener The listener to remove
`public`	# `removeSubscriber( Symfony\Component\EventDispatcher\EventSubscriberInterface $subscriber )` Removes an event subscriber. Removes an event subscriber. Parameters `$subscriber` `Symfony\Component\EventDispatcher\EventSubscriberInterface` $subscriber The subscriber
`public array`	# `getListeners( string $eventName = null )` Gets the listeners of a specific event or all listeners. Gets the listeners of a specific event or all listeners. Parameters `$eventName` `string` $eventName The name of the event Returns `array` The event listeners for the specified event, or all event listeners by event name
`public Boolean`	# `hasListeners( string $eventName = null )` Checks whether an event has any registered listeners. Checks whether an event has any registered listeners. Parameters `$eventName` `string` $eventName The name of the event Returns `Boolean` true if the specified event has any listeners, false otherwise