Adding A Notification Bubble To An Admin Menu Item
You’ve probably seen the small notification bubble that shows up in the Dashboard menu when a new update is available. Here’s how you can add a menu bubble to your own custom menu:
function add_menu_with_notification_bubble() {
$bubble = sprintf(
' <span class="update-plugins"><span class="update-count">%d</span></span>',
42 //bubble contents
);
add_dashboard_page(
'Example Menu',
'Example Menu' . $bubble,
'read',
'example-menu-item'
);
}
add_action('admin_menu', 'add_menu_with_notification_bubble');
The resulting menu will look like this:

