在Slim Framework3中为request分配唯一id的正确方法是什么？

<?php
use Psr\Http\Message\RequestInterface as Request;
use Psr\Http\Message\ResponseInterface as Response;

class UniqueIdMiddleware
{
    public function __invoke(Request $request, Response $response, $next)
    {
        // 生成唯一id
        $uniqueId = uniqid();

        // 将唯一id存储到请求的属性中
        $request = $request->withAttribute('uniqueId', $uniqueId);

        // 继续处理请求
        $response = $next($request, $response);

        return $response;
    }
}

<?php
use Slim\App;

$app = new App();

$app->add(new UniqueIdMiddleware());

// 定义路由和处理程序
$app->get('/', function (Request $request, Response $response) {
    // 从请求属性中获取唯一id
    $uniqueId = $request->getAttribute('uniqueId');

    // 在响应中返回唯一id
    $response->getBody()->write("Unique ID: $uniqueId");

    return $response;
});

$app->run();