krak / event-emitter
Event Emitter
v0.1.0
2017-03-19 04:32 UTC
Requires
- krak/invoke: ^0.1.0
Requires (Dev)
- peridot-php/peridot: ^1.19
This package is auto-updated.
Last update: 2024-10-18 17:54:23 UTC
README
Simple event emitter package with a lot of flexibility. Inspired by the Evenement library, EventEmitter provides a simple interface for adding and emitting events.
Installation
Install with composer at krak/event-emitter
Usage
<?php $emitter = Krak\EventEmitter\emitter(); // creates the default emitter instance $emitter->on('event', function($arg) { echo "Hello $arg\n"; }); $emitter->emit('event', "World");
This is the event emitter interface:
<?php interface EventEmitter { public function on($event, $listener); public function once($event, $listener); public function removeListener($event, $listener); public function removeAllListeners($event = null); public function listeners($event); public function emit($event, ...$arguments); }
Event Listeners
You can add event listener classes by implementing the EventListener
interface.
<?php use Krak\EventEmitter\EventListener; class AcmeListener implements EventListener { public function handle($param) { } }
You can then add this into the emitter via:
<?php $emitter->on('event', new AcmeListener());
Custom Invocation
The default emitter supports custom invocations via the Krak\Invoke library. You can easily pass in a custom invoker which provides flexibility with how your listeners will be invoked.
<?php use Krak\EventEmitter; // this creates an emitter that will support container services as listeners $invoke = new Krak\Invoke\ContainerInvoke(EventEmitter\emitterInvoke(), $container); $emitter = Krak\EventEmitter\emitter($invoke); $emitter->on('event', 'service_id'); $emitter->emit('event', 1);