如何让 wp_get_nav_menu_items 将子项与父项分组？

Question

参考函数 wp_get_nav_menu_items() https://developer.wordpress.org/reference/functions/wp_get_nav_menu_items/#

它返回一个对象，其中包含给定菜单的所有菜单项（包括子菜单项），按照它们在仪表板上的排列顺序。它不会将子菜单项与其父项分组，这可能会使创建您自己的菜单有点困难。有没有一种方法可以排列对象，以便子项分组在其父项的数组内？

Answer 1

        // wordpress does not group child menu items with parent menu items
        $menuLocations = get_nav_menu_locations();
        $navbar_items = wp_get_nav_menu_items($menuLocations['Navbar']);
        $child_items = [];

        // pull all child menu items into separate object
        foreach ($navbar_items as $key => $item) {
            if ($item->menu_item_parent) {
                array_push($child_items, $item);
                unset($navbar_items[$key]);
            }
        }

        // push child items into their parent item in the original object
        foreach ($navbar_items as $item) {
            foreach ($child_items as $key => $child) {
                if ($child->menu_item_parent == $item->post_name) {
                    if (!$item->child_items) {
                        $item->child_items = [];
                    }

                    array_push($item->child_items, $child);
                    unset($child_items[$key]);
                }
            }
        }

        // return navbar object where child items are grouped with parents
        return $navbar_items;