class UserController { private $userRepo; public function __construct(UserRepository $userRepo) { $this->userRepo = $userRepo; } public function index() { // do something with userRepo } }In the above example, the UserController class has a dependency on a UserRepository. The UserRepository is passed to the __construct method and saved as a property on the UserController. This allows the UserController to access the UserRepository throughout its methods. This code example likely belongs to a package or library that provides a framework for developing web applications using PHP. It may be part of a larger MVC (Model-View-Controller) framework, which separates the application logic into separate components for clearer organization and more maintainable code.