如何利用主流PHP框架实现可维护和可扩展的代码结构

// UserController.php (控制器)
class UserController extends Controller
{
    public function index()
    {
        $users = User::all(); // 从数据库获取用户数据
        return view('users.index', ['users' => $users]); // 将用户数据传递给视图
    }
}

// User.php (模型)
class User extends Model
{
    protected $table = 'users'; // 指定模型对应的数据库表
}

// index.blade.php (视图)
@foreach ($users as $user)
    <p>{{ $user->name }}</p>
@endforeach

// UserController.php (控制器)
class UserController extends AbstractController
{
    private $userService;
    
    public function __construct(UserService $userService)
    {
        $this->userService = $userService;
    }
    
    public function index()
    {
        $users = $this->userService->getAllUsers();
        return $this->render('users/index.html.twig', ['users' => $users]);
    }
}

// UserService.php (服务)
class UserService
{
    private $userRepository;
    
    public function __construct(UserRepository $userRepository)
    {
        $this->userRepository = $userRepository;
    }
    
    public function getAllUsers()
    {
        return $this->userRepository->getAll();
    }
}

// UserRepository.php (存储库)
class UserRepository
{   
    public function getAll()
    {
        // 获取所有用户数据的实现逻辑
    }
}

// index.html.twig (视图)
{% for user in users %}
    <p>{{ user.name }}</p>
{% endfor %}

// web.php (路由文件)
Route::get('/users', 'UserController@index')->middleware('auth');

// UserController.php (控制器)
class UserController extends Controller
{
    public function index()
    {
        $users = User::all();
        return view('users.index', ['users' => $users]);
    }
}

// VerifyUserMiddleware.php (中间件)
class VerifyUserMiddleware
{
    public function handle($request, Closure $next)
    {
        if (Auth::user()->isAdmin()) {
            return $next($request);
        } else {
            return redirect('/login');
        }
    }
}