如何使用WordPress中的钩子创建菜单并将其分配到某个位置？

In my theme, I am adding a menu upon theme activation using

add_action( 'after_setup_theme', 'mycustom_register_menu' );
function mycustom_register_menu() {
    register_nav_menu( 'somelocation', __( 'My Menu') );
}

I added the location in my theme's header.php, now all that's left is to create a menu in the dashbaord and assign it to that location. It works perfectly when I do so manually.

My question is, how can I automate it? so when the theme is activated and "My Menu" is added as a location, a menu with a certain name is created and assigned to that location? Is there a hook for that?

1. Creating Custom Navigation Menus in WordPress Theme

   function wpb_custom_new_menu() {
     register_nav_menu('my-custom-menu',__( 'My Custom Menu' ));
   }
   add_action( 'init', 'wpb_custom_new_menu' );
   

2. If you want to add more than one new navigation menu location, then you would need to use a code like this:

   function wpb_custom_new_menu() {`enter code here`
     register_nav_menus(
       array(
         'my-custom-menu' => __( 'My Custom Menu' ),
         'extra-menu' => __( 'Extra Menu' )
       )
     );
   }
   add_action( 'init', 'wpb_custom_new_menu' );
   

3. Displaying Custom Navigation Menus in WordPress Themes

   <?php
     wp_nav_menu( array( 
        'theme_location' => 'my-custom-menu', 
        'container_class' => 'custom-menu-class' ) ); 
   ?>