PHP code example of constanze-standard / event-dispatcher

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

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

    

constanze-standard / event-dispatcher example snippets

use ConstanzeStandard\EventDispatcher\Event;

$event = new Event();
echo $event->getName();  // \ConstanzeStandard\EventDispatcher\Event

use ConstanzeStandard\EventDispatcher\Event;

class CustomEvent extends Event
{
    private $id;
    private $data;

    public function __construct($id, $data)
    {
        $this->id = $id;
        $this->data = $data;
    }

    public function getName()
    {
        return $id;
    }
}

$event = new CustomEvent('user.create', ['id' => 1, 'name' => 'Alex']);

use ConstanzeStandard\EventDispatcher\Event;

class CustomEvent extends Event implements \Serializable
{
    ...

    public function serialize()
    {
        return serialize([
            'name' => $this->name,
            'data' => $this->data
        ]);
    }

    public function unserialize($serialized)
    {
        $array = unserialize($serialized);
        $this->name = $array['name'];
        $this->data = $array['data'];
    }
}

$event = new CustomEvent('user.create', ['id' => 1, 'name' => 'Alex']);
$decompEvent = unserialize(serialize($event));

use ConstanzeStandard\EventDispatcher\Interfaces\EventInterface;

// 可调用对象
function onSomeEvent(EventInterface $event) {
    echo $event->getName();
    return $event;
}

class Listener
{
    // 普通的类方法
    public function onSomeEvent(EventInterface $event)
    {
        echo $event->getName();
        return $event;
    }
}

use ConstanzeStandard\EventDispatcher\Interfaces\EventInterface;

function onSomeEvent(EventInterface $event) {
    return $event->withPropagationStopped();
}

use ConstanzeStandard\EventDispatcher\ListenerProvider;

$listenerProvider = new ListenerProvider();
$listenerProvider->addListener('user.create', onSomeEvent::class, 2);
$listenerProvider->addListener('user.create', [new Listener(), 'onSomeEvent'], 10);

use ConstanzeStandard\EventDispatcher\EventDispatcher;
use Psr\EventDispatcher\ListenerProviderInterface;

/** @var ListenerProviderInterface $listenerProvider */
$dispatcher = new EventDispatcher($listenerProvider);
$dispatcher->dispatch($event);

use ConstanzeStandard\EventDispatcher\Interfaces\EventInterface;
use ConstanzeStandard\EventDispatcher\Interfaces\SubscriberInterface;

class UserSubscriber implements SubscriberInterface
{
    public function subscribe(Closure $subscriber)
    {
        $subscriber(
            'user.signup',
            'onSignup',
            ['onCreate', 1]
        );
    }

    public function onSignup(EventInterface $event)
    {
        ...
        return $event;
    }

    public function onCreate(EventInterface $event)
    {
        ...
        return $event;
    }
}

$listenerProvider->addSubscriber(new UserSubscriber());