Laravel在重定向后不保存会话

return redirect('/')->with('message', 'Hello, World!');

$message = session('message');

session()->put('key', 'value');

$value = session('key');

namespace App\Http\Middleware;

use Closure;
use Illuminate\Support\Facades\Session;

class SaveSessionMiddleware
{
    public function handle($request, Closure $next)
    {
        if (!Session::isStarted()) {
            Session::start();
        }

        $response = $next($request);

        if (Session::isStarted()) {
            Session::save();
        }

        return $response;
    }
}

Route::group(['middleware' => 'save.session'], function () {
    // 路由或控制器代码
});