Problem with ToolBar in PHP-GTK2

/* translated from portuguese by Google */ I am trying to create a ToolBar in the Php-gtk2. Until I obtain, but instead of 4 buttons alone he appears 3. I place stock_ids of the buttons that I need in an Array and later I cover the Array generating the buttons and placing them in another Array. The problem is that the first button never is placed in the Array. I do not know if I am making some wrong thing. Somebody can give one help? [ ]'s Daniel Braga <?php class ToolBar extends GtkToolBar {

    var $buttons_id = array('gtk-new', 'gtk-media-pause', 'gtk-refresh', 'gtk-quit');
    var $buttons = array();

    function __construct()
    {
        parent::__construct();
    }

    function load_buttons()
    {
        foreach ($this->buttons_id as $stock_id) {
            $this->buttons[$stock_id] = GtkToolButton::new_from_stock($stock_id);
        }
    }

    function add_buttons()
    {
        foreach ($this->buttons as $button) {
            parent::add($button);
        }
    }

    static function get_toolbar()
    {
        $tool = &new ToolBar();
        $tool->load_buttons();
        $tool->add_buttons();
        return $tool;
    }

} $window = new GtkWindow(); $window->connect_object('destroy', array('gtk','main_quit')); $toolbar = ToolBar::get_toolbar(); $window->add($toolbar); $window->show_all(); Gtk::main(); ?>