session入库，入库后就能共享了

这和 nginx 没有什么关系, 你需要的是修改 Session Driver

/* |-------------------------------------------------------------------------- | Default Session Driver |-------------------------------------------------------------------------- | | This option controls the default session "driver" that will be used on | requests. By default, we will use the lightweight native driver but | you may specify any of the other wonderful drivers provided here. | | Supported: "file", "cookie", "database", "apc", | "memcached", "redis", "array" | */ 'driver' => env('SESSION_DRIVER', 'file');