add_menu_page('My Custom Page', 'My Custom Page', 'manage_options', 'my-top-level-slug');
add_submenu_page( 'my-top-level-slug', 'My Custom Page', 'My Custom Page',
'manage_options', 'my-top-level-slug');
add_submenu_page( 'my-top-level-slug', 'My Custom Submenu Page', 'My Custom Submenu Page',
'manage_options', 'my-secondary-slug');
/**
* °°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°Adding settting page to the custom post type
* menu id : menu-posts-portfolio (left sidebar)
*
*/
function books_register_ref_page() {
add_submenu_page(
'edit.php?post_type=portfolio',
__( 'Portfolio Settings', 'portfolio' ), //page titlte
__( 'Settings', 'portfolio' ), // submenu iteam name
'manage_options',
'portofile-setttings', //slug
'books_ref_page_callback' //render age content
);
}
add_action( 'init', 'books_register_ref_page', 0 ); //resgister the function
/**
* Display callback for the submenu page.
*/
function books_ref_page_callback() {
?>
<div class="wrap">
<p><?php _e( 'Helpful stuff here', 'portfolio' ); ?></p>
</div>
<?php
}