_wp_reset_invalid_menu_item_parent() │ WP 6.2.0

Prevents menu items from being their own parent.

Resets menu_item_parent to 0 when the parent is set to the item itself. For use before saving _menu_item_menu_item_parent in nav-menus.php.

Internal function — this function is designed to be used by the kernel itself. It is not recommended to use this function in your code.

No Hooks.

Return

Array. The menu item data with reset menu_item_parent.

Usage

_wp_reset_invalid_menu_item_parent( $menu_item_data );
$menu_item_data(array) (required)
The menu item data array.

Changelog

Since 6.2.0 Introduced.

_wp_reset_invalid_menu_item_parent() code WP 6.8

wp-includes/nav-menu.php 
function _wp_reset_invalid_menu_item_parent( $menu_item_data ) {
	if ( ! is_array( $menu_item_data ) ) {
		return $menu_item_data;
	}

	if (
		! empty( $menu_item_data['ID'] ) &&
		! empty( $menu_item_data['menu_item_parent'] ) &&
		(int) $menu_item_data['ID'] === (int) $menu_item_data['menu_item_parent']
	) {
		$menu_item_data['menu_item_parent'] = 0;
	}

	return $menu_item_data;
}