Create Custom Sub Menu Admin Panel with add_theme_page

Do you want to create a sub menu item in the appearance setting and link it to a custom admin panel? While there’s probably a plugin for this, we have created a quick code snippet that you can use create custom sub menu admin panel with add_theme_page in WordPress.

Instructions:

All you have to do is add this code to your theme’s functions.php file or in a site-specific plugin:

add_action('admin_menu', 'sub_menu_function');
function sub_menu_function() {
	add_theme_page('Sub menu title', 'Sub menu title', 'manage_options', 'sub-menu-slug', 'sub_menu_panel');
}

function sub_menu_panel() {
	if (!current_user_can('manage_options'))  {
		wp_die( __('You do not have sufficient permissions to access this page.') );
	}
	echo '<div class="wrap"><div id="icon-options-general" class="icon32">
		<br>
	</div>
	<h2>Sub menu title</h2></div>';
}

Note: If this is your first time adding code snippets in WordPress, then please refer to our guide on how to properly add code snippets in WordPress, so you don’t accidentally break your site.

If you liked this code snippet, please consider checking out our other articles on the site like: How to create a WordPress form with a date picker and 9 best WordPress ad management plugins.