wp-includes/blocks/navigation.php:1279Get the classic navigation menu to use as a fallback.
objectfunction block_core_navigation_get_classic_menu_fallback() { _deprecated_function( __FUNCTION__, '6.3.0', 'WP_Navigation_Fallback::get_classic_menu_fallback' ); $classic_nav_menus = wp_get_nav_menus(); // If menus exist. if ( $classic_nav_menus && ! is_wp_error( $classic_nav_menus ) ) { // Handles simple use case where user has a classic menu and switches to a block theme. // Returns the menu assigned to location `primary`. $locations = get_nav_menu_locations(); if ( isset( $locations['primary'] ) ) { $primary_menu = wp_get_nav_menu_object( $locations['primary'] ); if ( $primary_menu ) { return $primary_menu; } } // Returns a menu if `primary` is its slug. foreach ( $classic_nav_menus as $classic_nav_menu ) { if ( 'primary' === $classic_nav_menu->slug ) { return $classic_nav_menu; } } // Otherwise return the most recently created classic menu. usort( $classic_nav_menus, static function ( $a, $b ) { return $b->term_id - $a->term_id; } ); return $classic_nav_menus[0]; }}Introduced in 6.2.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/blocks/navigation.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.