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.
Methods
| Event | dispatch(string $eventName, Event $event = null) Dispatches an event to all registered listeners. | |
| addListener(string $eventName, callable $listener, int $priority) Adds an event listener that listens on the specified events. | ||
| addSubscriber(EventSubscriberInterface $subscriber) Adds an event subscriber. | ||
| removeListener(string $eventName, callable $listener) Removes an event listener from the specified events. | ||
| removeSubscriber(EventSubscriberInterface $subscriber) Removes an event subscriber. | ||
| array | getListeners(string $eventName = null) Gets the listeners of a specific event or all listeners sorted by descending priority. | |
| int|null | getListenerPriority(string $eventName, callable $listener) Gets the listener priority for a specific event. | |
| bool | hasListeners(string $eventName = null) Checks whether an event has any registered listeners. |
Details
Event dispatch(string $eventName, Event $event = null)
Dispatches an event to all registered listeners.
addListener(string $eventName, callable $listener, int $priority)
Adds an event listener that listens on the specified events.
addSubscriber(EventSubscriberInterface $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.
removeListener(string $eventName, callable $listener)
Removes an event listener from the specified events.
removeSubscriber(EventSubscriberInterface $subscriber)
Removes an event subscriber.
array getListeners(string $eventName = null)
Gets the listeners of a specific event or all listeners sorted by descending priority.
int|null getListenerPriority(string $eventName, callable $listener)
Gets the listener priority for a specific event.
Returns null if the event or the listener does not exist.
bool hasListeners(string $eventName = null)
Checks whether an event has any registered listeners.
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