Which function is register new custom menu in wordpress?

The function to register a new custom menu in WordPress is register_nav_menu(). Here's a step-by-step guide on how to use it:

1. Open your theme's functions.php file. This file is usually located in the wp-content/themes/your-theme-name/ directory.

2. Add the following code to the functions.php file:

function register_my_menu() {
  register_nav_menu('new-menu',__( 'New Menu' ));
}
add_action( 'init', 'register_my_menu' );

In this code, 'new-menu' is the slug of your new custom menu and 'New Menu' is the description.

3. Save the changes and close the functions.php file.

4. Go to your WordPress admin panel and navigate to Appearance > Menus.

5. Click on create a new menu.

6. In the Menu Name field, enter the name of your new custom menu and click Create Menu.

7. Now you can add items to your new custom menu and assign it to a theme location.

Remember, the register_nav_menu() function should be hooked to the init action hook. This ensures that it runs after WordPress has finished loading but before any headers are sent.