提前10分钟提醒信息

1.修改redis配置文件

notify-keyspace-events "Ex"

2.修改datebase配置文件

 'notify_cache' => [
            'host' => env('REDIS_HOST', '127.0.0.1'),
            'password' => env('REDIS_PASSWORD', null),
            'port' => env('REDIS_PORT', 6379),
            'database' => env('REDIS_DB', 4),
            'read_write_timeout' => -1,  // 读写超时设定
        ],

3.创建过期key

$ttl = strtotime($data['return_time']) - time() - 600;
$redis = Redis::connection('notify_cache');
$redis->set('NOTIFY_CONFIRM:'.$id,$id);
$redis->expire('NOTIFY_CONFIRM:'.$id,$ttl);

4.创建监听队列

$cache_db = config('database.redis.notify_cache.database',4);
$pattern = '__keyevent@'.$cache_db.'__:expired';
Redis::connection('notify_cache')->subscribe($pattern,function ($channel){
    // 订阅键过期事件
    Log::info('-----notify-----'.$channel);
    $key_type = str_before($channel,':');
    switch ($key_type) {
        case 'NOTIFY_CONFIRM':
            $id = str_after($channel,':');    // 取出学员ID
            $client  = Client::find($id);
            if ($client) {
                  //业务逻辑
                }
            }
            break;
        default:
            break;
    }
});

PS:之所以用这种方式 不想每段时间是去做扫表操作。