Laravel 11 broadcasting example code

Laravel's event broadcasting allows you to broadcast your server-side Laravel events to your client-side JavaScript application using a driver-based approach to WebSockets. The events may be easily consumed on the client-side using the Laravel Echo JavaScript package.[1]

Events are broadcast over "channels", which may be specified as public or private. Any visitor to your application may subscribe to a public channel without any authentication or authorization; however, in order to subscribe to a private channel, a user must be authenticated and authorized to listen on that channel.[1][2]

To get started with broadcasting in Laravel 11:

1. Configure the broadcasting driver in the `config/broadcasting.php` file. Laravel supports several drivers out of the box, including Laravel Reverb, Pusher Channels, and Ably.[1]
2. Define broadcast events in your application by creating a `Broadcast` event class and implementing the `broadcastOn()` method to specify the channel(s) the event should broadcast to.[1][2]
3. Broadcast the event using the `Broadcast::event()` method, either directly or by dispatching the event.[2][3]
4. On the client-side, use Laravel Echo to subscribe to the broadcast channels and listen for the events. You can listen for events on both public and private channels.[2]

Here's an example of broadcasting an event in Laravel 11:

php
// In your event class
class PostUpdated extends Broadcast
{
    public $post;

    public function __construct(Post $post)
    {
        $this->post = $post;
    }

    public function broadcastOn()
    {
        return new Channel('posts');
    }
}

// In your controller
public function update(Request $request, Post $post)
{
    $post->update($request->all());

    event(new PostUpdated($post));

    return response()->json($post);
}

And on the client-side using Laravel Echo:

javascript
Echo.channel('posts')
    .listen('PostUpdated', (e) => {
        console.log(`A new post was updated: ${e.post.message}`);
    });

This example demonstrates broadcasting a `PostUpdated` event on the `posts` channel, which can be listened to by the client-side application using Laravel Echo.[1][2][3]