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function is not described

_sort_nav_menu_items() WP 3.0.0

Deprecated in 4.7.0. It is no longer supported and can be removed in future releases. Use wp_list_sort() instead.

Sort menu items by the desired key.

  • Global. String. $_menu_item_sort_prop

No Hooks.

Return

Int. -1, 0, or 1 if $a is considered to be respectively less than, equal to, or greater than $b.

Usage

_sort_nav_menu_items( $a, $b );
$a(object) (required)
The first object to compare
$b(object) (required)
The second object to compare

Code of sort nav menu items: wp-includes/deprecated.php VER 5.1.1

<?php
function _sort_nav_menu_items( $a, $b ) {
	global $_menu_item_sort_prop;

	_deprecated_function( __FUNCTION__, '4.7.0', 'wp_list_sort()' );

	if ( empty( $_menu_item_sort_prop ) )
		return 0;

	if ( ! isset( $a->$_menu_item_sort_prop ) || ! isset( $b->$_menu_item_sort_prop ) )
		return 0;

	$_a = (int) $a->$_menu_item_sort_prop;
	$_b = (int) $b->$_menu_item_sort_prop;

	if ( $a->$_menu_item_sort_prop == $b->$_menu_item_sort_prop )
		return 0;
	elseif ( $_a == $a->$_menu_item_sort_prop && $_b == $b->$_menu_item_sort_prop )
		return $_a < $_b ? -1 : 1;
	else
		return strcmp( $a->$_menu_item_sort_prop, $b->$_menu_item_sort_prop );
}