Symfony事件系统怎么用_Symfony事件监听分发及自定义事件实现方法

// src/EventListener/RequestLoggerListener.php
namespace App\EventListener;
<p>use Symfony\Component\HttpKernel\Event\RequestEvent;</p><p>class RequestLoggerListener
{
public function __invoke(RequestEvent $event)
{
$request = $event->getRequest();
error_log("请求路径: " . $request->getPathInfo());
}
}</p>

// src/Event/UserRegisteredEvent.php
namespace App\Event;
<p>use Symfony\Contracts\EventDispatcher\Event;
use App\Entity\User;</p><p>class UserRegisteredEvent extends Event
{
public const NAME = 'user.registered';</p><pre class='brush:php;toolbar:false;'>public function __construct(private User $user) {}

public function getUser(): User
{
    return $this->user;
}

// 在控制器或服务中
use App\Event\UserRegisteredEvent;
<p>public function register(Request $request, EventDispatcherInterface $dispatcher)
{
// ... 用户注册逻辑
$user = new User();
// 保存用户</p><pre class='brush:php;toolbar:false;'>// 触发事件
$event = new UserRegisteredEvent($user);
$dispatcher->dispatch($event, UserRegisteredEvent::NAME);

return new Response('注册成功');

// src/EventListener/SendWelcomeEmailListener.php
namespace App\EventListener;
<p>use App\Event\UserRegisteredEvent;</p><p>class SendWelcomeEmailListener
{
public function __invoke(UserRegisteredEvent $event)
{
$user = $event->getUser();
// 发送欢迎邮件逻辑
error_log("发送欢迎邮件给: " . $user->getEmail());
}
}
</font></p>

# config/services.yaml
services:
    App\EventListener\SendWelcomeEmailListener:
        tags:
            - { name: kernel.event_listener, event: user.registered }

# 设置高优先级
tags:
  - { name: kernel.event_listener, event: user.registered, priority: 100 }