vinkla/Pusher不适用于laravel 5.4

'providers' => [
    // ...
    Illuminate\Broadcasting\BroadcastServiceProvider::class,
],

'aliases' => [
    // ...
    'Broadcast' => Illuminate\Support\Facades\Broadcast::class,
],

'default' => env('BROADCAST_DRIVER', 'pusher'),

'connections' => [
    // ...
    'pusher' => [
        'driver' => 'pusher',
        'key' => env('PUSHER_APP_KEY'),
        'secret' => env('PUSHER_APP_SECRET'),
        'app_id' => env('PUSHER_APP_ID'),
        'options' => [
            'cluster' => env('PUSHER_APP_CLUSTER'),
            'encrypted' => true,
        ],
    ],
],

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

namespace App\Events;

use Illuminate\Broadcasting\Channel;
use Illuminate\Contracts\Broadcasting\ShouldBroadcast;
use Illuminate\Queue\SerializesModels;

class ExampleEvent implements ShouldBroadcast
{
    use SerializesModels;

    public $message;

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

    public function broadcastOn()
    {
        return new Channel('example-channel');
    }
}

namespace App\Http\Controllers;

use App\Events\ExampleEvent;

class ExampleController extends Controller
{
    public function exampleMethod()
    {
        event(new ExampleEvent('Hello, world!'));
    }
}