symfony/event-dispatcher

Features

• Event Dispatchers - Provides an event-driven communication library that lets components broadcast named events and register listeners.
• Event Payload Dispatchers - Fires named events with data payloads from any part of an application to trigger registered listeners.
• Event-Driven Architectures - Implements event-driven architecture by decoupling components through a central dispatch mechanism.
• Propagation Halting - Implements stoppable event propagation where listeners can halt further handler execution.
• Event Subscribers - Provides an event subscriber pattern that groups multiple listeners into self-registering classes.
• Listener Queues - Organizes event listeners in a priority-ordered queue for controlled execution order.
• Event Propagation Halting - Halts further listener execution for a dispatched event from within a listener.
• Callable Listeners - Provides a flexible listener interface that accepts any PHP callable as an event handler.
• Application Event Listeners - Broadcasts named events from application components and reacts to them via registered listeners.
• Event Listener Managers - Attaches callback functions to specific events with configurable execution priority for ordered responses.
• Priority Listeners - Attaches callable listeners to named events with configurable priority and propagation control.
• Event Listeners - Attaches callable listeners to named events with optional priority ordering for execution.

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