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_wp_menus_changed()

This function’s access is marked private. This means it is not intended for use by plugin or theme developers, only in other core functions. It is listed here for completeness.

Handle menu config after theme change.

Source

File: wp-includes/nav-menu.php 

function _wp_menus_changed() {
	$old_nav_menu_locations    = get_option( 'theme_switch_menu_locations', array() );
	$new_nav_menu_locations    = get_nav_menu_locations();
	$mapped_nav_menu_locations = wp_map_nav_menu_locations( $new_nav_menu_locations, $old_nav_menu_locations );

	set_theme_mod( 'nav_menu_locations', $mapped_nav_menu_locations );
	delete_option( 'theme_switch_menu_locations' );
}

Uses

Uses Description
wp-includes/nav-menu.php: wp_map_nav_menu_locations()

Maps nav menu locations according to assignments in previously active theme.
wp-includes/theme.php: set_theme_mod()

Updates theme modification value for the current theme.
wp-includes/option.php: delete_option()

Removes option by name. Prevents removal of protected WordPress options.
wp-includes/option.php: get_option()

Retrieves an option value based on an option name.
wp-includes/nav-menu.php: get_nav_menu_locations()

Retrieves all registered navigation menu locations and the menus assigned to them.

Changelog

Version Description
4.9.0 Introduced.

© 2003–2019 WordPress Foundation
Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/functions/_wp_menus_changed