How to broadcast events to Pusher in Laravel?

To broadcast data to Pusher using Laravel, you will need to install the Pusher PHP library and the Laravel Pusher Bridge package.

1. First, install the Pusher PHP library by running the following command:

composer require pusher/pusher-php-server

2. In your .env file, set the following values with your Pusher credentials:

PUSHER_APP_ID=your-app-id
PUSHER_APP_KEY=your-app-key
PUSHER_APP_SECRET=your-app-secret
PUSHER_APP_CLUSTER=your-app-cluster

3. In your config/broadcasting.php file, set the default broadcast driver to “pusher”:

'default' => 'pusher',

4. To broadcast data to Pusher, you can use the broadcast method of the Illuminate\Support\Facades\Event facade. This method accepts an event instance and an array of data as arguments. The event instance should implement the Illuminate\Contracts\Broadcasting\ShouldBroadcast interface.

Here’s an example of how you can broadcast data to Pusher:

use App\Events\ExampleEvent;
use Illuminate\Support\Facades\Event;

Event::broadcast(new ExampleEvent(['key' => 'value']))

In the example above, the ExampleEvent event class should implement the ShouldBroadcast interface and define a broadcastOn method that returns an array of channels to which the event should be broadcast.

For example:

<?php

namespace App\Events;

use Illuminate\Broadcasting\Channel;
use Illuminate\Broadcasting\InteractsWithSockets;
use Illuminate\Broadcasting\PrivateChannel;
use Illuminate\Contracts\Broadcasting\ShouldBroadcast;
use Illuminate\Foundation\Events\Dispatchable;
use Illuminate\Queue\SerializesModels;

class ExampleEvent implements ShouldBroadcast
{
    use Dispatchable, InteractsWithSockets, SerializesModels;

    public $data;

    /**
     * Create a new event instance.
     *
     * @return void
     */
    public function __construct($data)
    {
        $this->data = $data;
    }

    /**
     * Get the channels the event should broadcast on.
     *
     * @return \Illuminate\Broadcasting\Channel|array
     */
    public function broadcastOn()
    {
        return new Channel('example-channel');
    }
}

For more information about broadcasting data to Pusher using Laravel, you can refer to the documentation at https://laravel.com/docs/8.x/broadcasting.