php di 实际应用

php userRepository = $userRepository; } public function getUserById($userId) { return $this->userRepository->findUserById($userId); } } class UserRepository { public function findUserById($userId) { // 从数据库中查找用户信息 return "User" . $userId; } } $userRepository = new UserRepository(); $userService = new UserService($userRepository); $user = $userService->getUserById(1); echo $user; ?>