Class EventDispatcher

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.

Symfony\Component\EventDispatcher\EventDispatcher implements Symfony\Component\EventDispatcher\EventDispatcherInterface

Direct known subclasses

Symfony\Component\EventDispatcher\ContainerAwareEventDispatcher

Namespace: Symfony\Component\EventDispatcher
Author: Guilherme Blanco <guilhermeblanco@hotmail.com>
Author: Jonathan Wage <jonwage@gmail.com>
Author: Roman Borschel <roman@code-factory.org>
Author: Bernhard Schussek <bschussek@gmail.com>
Author: Fabien Potencier <fabien@symfony.com>
Author: Jordi Boggiano <j.boggiano@seld.be>
Author: Jordan Alliot <jordan.alliot@gmail.com>
Api
Located at event-dispatcher/Symfony/Component/EventDispatcher/EventDispatcher.php

Methods summary
`public Symfony\Component\EventDispatcher\Event`	# `dispatch( string $eventName, Symfony\Component\EventDispatcher\Event $event = null )` Parameters `$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` See `Symfony\Component\EventDispatcher\EventDispatcherInterface::dispatch()` Api Implementation of `Symfony\Component\EventDispatcher\EventDispatcherInterface::dispatch()`
`public array`	# `getListeners( string $eventName = null )` Parameters `$eventName` `string` $eventName The name of the event Returns `array` The event listeners for the specified event, or all event listeners by event name See `Symfony\Component\EventDispatcher\EventDispatcherInterface::getListeners()` Implementation of `Symfony\Component\EventDispatcher\EventDispatcherInterface::getListeners()`
`public Boolean`	# `hasListeners( string $eventName = null )` Parameters `$eventName` `string` $eventName The name of the event Returns `Boolean` true if the specified event has any listeners, false otherwise See `Symfony\Component\EventDispatcher\EventDispatcherInterface::hasListeners()` Implementation of `Symfony\Component\EventDispatcher\EventDispatcherInterface::hasListeners()`
`public`	# `addListener( string $eventName, callable $listener, integer $priority = 0 )` Parameters `$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) See `Symfony\Component\EventDispatcher\EventDispatcherInterface::addListener()` Api Implementation of `Symfony\Component\EventDispatcher\EventDispatcherInterface::addListener()`
`public`	# `removeListener( string\|array $eventName, callable $listener )` Parameters `$eventName` `string\|array` $eventName The event(s) to remove a listener from `$listener` `callable` $listener The listener to remove See `Symfony\Component\EventDispatcher\EventDispatcherInterface::removeListener()` Implementation of `Symfony\Component\EventDispatcher\EventDispatcherInterface::removeListener()`
`public`	# `addSubscriber( Symfony\Component\EventDispatcher\EventSubscriberInterface $subscriber )` Parameters `$subscriber` `Symfony\Component\EventDispatcher\EventSubscriberInterface` $subscriber The subscriber. See `Symfony\Component\EventDispatcher\EventDispatcherInterface::addSubscriber()` Api Implementation of `Symfony\Component\EventDispatcher\EventDispatcherInterface::addSubscriber()`
`public`	# `removeSubscriber( Symfony\Component\EventDispatcher\EventSubscriberInterface $subscriber )` Parameters `$subscriber` `Symfony\Component\EventDispatcher\EventSubscriberInterface` $subscriber The subscriber See `Symfony\Component\EventDispatcher\EventDispatcherInterface::removeSubscriber()` Implementation of `Symfony\Component\EventDispatcher\EventDispatcherInterface::removeSubscriber()`
`protected`	# `doDispatch( array[callback] $listeners, string $eventName, Symfony\Component\EventDispatcher\Event $event )` Triggers the listeners of an event. Triggers the listeners of an event. This method can be overridden to add functionality that is executed for each listener. Parameters `$listeners` `array[callback]` $listeners The event listeners. `$eventName` `string` $eventName The name of the event to dispatch. `$event` `Symfony\Component\EventDispatcher\Event` $event The event object to pass to the event handlers/listeners.

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Class EventDispatcher

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