PHP code example of waffle-commons / event-dispatcher

1. Go to this page and download the library: Download waffle-commons/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/ */

waffle-commons / event-dispatcher example snippets


use Waffle\Commons\EventDispatcher\Dispatcher\EventDispatcher;
use Waffle\Commons\EventDispatcher\Provider\ListenerProvider;

$provider = new ListenerProvider();
$provider->addListener(UserRegistered::class, function (UserRegistered $event): void {
    // …
}, priority: 100); // higher priority = earlier

$dispatcher = new EventDispatcher($provider);
$event = $dispatcher->dispatch(new UserRegistered($userId));


#[Attribute(Attribute::TARGET_CLASS | Attribute::TARGET_METHOD)]
final readonly class AsEventListener
{
    public function __construct(
        public ?string $event = null,
        public int $priority = 0,
    ) {}
}


final class AuditListener
{
    #[AsEventListener(priority: 50)]
    public function onUserRegistered(UserRegistered $event): void
    {
        // resolved automatically from the parameter type
    }
}

$provider->register(new AuditListener());


#[AsEventListener(event: UserRegistered::class, priority: 50)]
final class WelcomeMailer
{
    public function send(UserRegistered $event): void { /* … */ }
}

$provider->register(new WelcomeMailer());


use Waffle\Commons\EventDispatcher\Event\AbstractStoppableEvent;

final class CancellableJob extends AbstractStoppableEvent
{
    public function __construct(public readonly string $jobId) {}
}

$provider->addListener(CancellableJob::class, function (CancellableJob $e): void {
    if ($shouldCancel) {
        $e->stopPropagation();
    }
});