如何在slim框架中使用slim中间件将自定义类从文件夹加载到路由

<?php

namespace App;

class CustomClass
{
    public function doSomething()
    {
        // 业务逻辑代码
    }
}

<?php

namespace App\Middleware;

use Slim\Http\Request;
use Slim\Http\Response;

class CustomMiddleware
{
    public function __invoke(Request $request, Response $response, $next)
    {
        // 加载自定义类
        require_once __DIR__ . '/../CustomClass.php';

        // 实例化自定义类
        $customClass = new \App\CustomClass();

        // 将自定义类实例添加到Slim容器中
        $this->container['customClass'] = function ($container) use ($customClass) {
            return $customClass;
        };

        // 继续处理下一个中间件
        $response = $next($request, $response);

        return $response;
    }
}

<?php

require __DIR__ . '/../vendor/autoload.php';

$app = new \Slim\App();

// 注册中间件
$app->add(new \App\Middleware\CustomMiddleware());

// 定义路由
$app->get('/', function ($request, $response) {
    // 从容器中获取自定义类实例
    $customClass = $this->get('customClass');

    // 调用自定义类的方法
    $customClass->doSomething();

    // 返回响应
    return $response->write('Hello, Slim Framework!');
});

$app->run();