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PHP code example of onoi / event-dispatcher

1. Go to this page and download the library: Download onoi/event-dispatcher library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php.

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

onoi / event-dispatcher example snippets


class BarListener implements EventListener {

	public function execute( DispatchContext $dispatchContext = null ) {
		// Do something
	}

	public function isPropagationStopped() {
		return false;
	}
}


class ListenerCollectionRegistry implements EventListenerCollection {

	private $eventListenerCollection;

	public function __construct( EventListenerCollection $eventListenerCollection ) {
		$this->eventListenerCollection = $eventListenerCollection;
	}

	public function getCollection() {
		return $this->addToListenerCollection()->getCollection();
	}

	private function addToListenerCollection() {

		$this->eventListenerCollection->registerCallback( 'do.something', function() {
			// Do something
		} );

		$this->eventListenerCollection->registerListener( 'notify.bar', new BarListener() );

		return $this->eventListenerCollection;
	}
}


$eventDispatcherFactory = new EventDispatcherFactory();

$listenerCollectionRegistry = new ListenerCollectionRegistry(
	$eventDispatcherFactory->newGenericEventListenerCollection()
);

$eventDispatcher = $eventDispatcherFactory->newGenericEventDispatcher();
$eventDispatcher->addListenerCollection( $listenerCollectionRegistry );

class Foo {

	use EventDispatcherAwareTrait;

	public function doSomething() {

		// No context
		$this->eventDispatcher->dispatch( 'do.something' );

		$dispatchContext = new DispatchContext();
		$dispatchContext->set( 'dosomethingelse', new \stdClass );

		// Using `DispatchContext`
		$this->eventDispatcher->dispatch( 'notify.bar', $dispatchContext );

		// Using an array as context which is later converted into
		// a `DispatchContext`
		$this->eventDispatcher->dispatch( 'notify.foo', [ 'Bar' => 123 ] );
	}
}

$instance = new Foo();
$instance->setEventDispatcher( $eventDispatcher );
$instance->doSomething();