问无法从子类中设置父属性

EN

class View {
    public function __construct() {
    }
    public static function render($name) {
        require 'views/user/header.php';
        require 'views/user/'.$name.'.php';
        require 'views/user/footer.php';
    }
}

class Controller {
    function __construct() {
        $this->view = new View();
    }
}

class Index extends Controller {

    function __construct() {
        parent::__construct();
        $this->view->js = "test";
    }

    public function index() {
        $this->view->render('index/index');
    }
}

Fatal error: Uncaught Error: Using $this when not in object context

echo get_class(); // and this method return "View";