parking_manage_system/app/Events/SendAnnouncement.php

<?php

namespace App\Events;

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

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

    public string $message;
    public array $data;
    public int $type;

    public function __construct($message, $data, $type = 1)
    {
        $this->message = $message;
        $this->data = $data;
        $this->type = $type;
    }

    // 定义事件要广播到的公共频道
    public function broadcastOn(): array
    {
        return [
            new Channel('channel-pub'), // 公共频道
        ];
    }

    // 可选：自定义广播数据
    public function broadcastWith(): array
    {
        return [
            'message' => $this->message,
            'data' => $this->data,
            'type' => $this->type,
            'time' => now()->toDateTimeString(),
        ];
    }
}