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There’s 2 types of notifications: a) read and b) unread.

bp_notifications_get_unread_notification_count( $user_id ) will get you the unread count so you could use that value in the comparison you mentioned here.

How are you getting the user’s ID $user_id?

…how do I get it?

That depends. For example:

If you want the currently logged-in user:

$user_id = bp_loggedin_user_id();

If the context is a member’s profile page and you want the displayed member:

$user_id = bp_displayed_user_id();

So, depending on the above, what you need may be either:

bp_notifications_get_unread_notification_count( bp_loggedin_user_id() );

or

bp_notifications_get_unread_notification_count( bp_displayed_user_id() );

Because we’re talking about notifications, it’s likely you’ll want the former because you wouldn’t really need to show somebody else’s notifications count.

Then perhaps you have zero unread notifications?

Try this (tested on 2.2 RC2)

function bpfr_add_notification_to_page_title( $title, $original_title, $sep, $seplocation  ) {
	global $bp;
	if( bp_is_user() && ! bp_get_member_user_id() ) {
        $user_id = 'displayed: '. bp_displayed_user_id();
    } else {
        $user_id = 'get_member_user: '. bp_get_member_user_id();
    }

	if (bp_notifications_get_unread_notification_count( $user_id ) ) {

		$counter = 0;
			for ( $i = 0; $i < count($notifications); $i++ ) {
				echo $notifications[$i];
			$counter++;
			}	

	if ( bp_is_profile_component() || bp_is_current_action( 'just-me' ) ) {
		
			$title .= bp_notifications_get_unread_notification_count() . " $sep ";
    }
		return $title;
	}
}
add_filter( 'bp_modify_page_title', 'bpfr_add_notification_to_page_title', 9, 4 );

@chatty24, all readers,

the modified code used here throws a warning with BP 2.2. Don’t use it !

FYI the title code after applying the snippet looks like this:
<title>You Have 1 New Notification(s) - </title>
You can probably remove the –

Thxs @sbrajesh, you where faster as me ! 😉

hi ailyroot,

no time to sort out what you need, but see here 3 snippets using different wya to add such item to a theme main menu or custom menu, with fixed or free position… Test and take the one you need.

//fixed position
function my_nav_menu_notif_counter($menu) {      
        if (!is_user_logged_in())
                return $menu;
        else
                $notif = '<li>Notif '. bp_notifications_get_unread_notification_count( bp_loggedin_user_id() ) .'</li>';
                $menu = $menu . $notif;
                return $menu;
}
add_filter( 'wp_nav_menu_items', 'my_nav_menu_notif_counter' );

//choose position
function my_nav_menu_positioned_notif_counter( $items, $args ) 
{
    if( $args->theme_location == 'primary' ) // only for primary menu
    {
        $items_array = array();
        while ( false !== ( $item_pos = strpos ( $items, '<li', 3) ) )
        {
            $items_array[] = substr($items, 0, $item_pos);
            $items = substr($items, $item_pos);
        }
        $items_array[] = $items;
        array_splice($items_array, 0, 0, '<li>Notif '. bp_notifications_get_unread_notification_count( bp_loggedin_user_id() ) .'</li>'); // 0,0 is first position, 1,0 is second, etc

        $items = implode('', $items_array);
    }
    return $items;
}
add_filter('wp_nav_menu_items','my_nav_menu_positioned_notif_counter', 10, 2);

// depending the theme, $theme_location may vary and this one use a menu ID
function my_notif_link( $items, $args ) {

$theme_location = 'primary';// Theme Location slug
$existing_menu_item_db_id = 6; // menu id
$new_menu_item_db_id = 66; // unique id number
$label = 'Notificationas '. bp_notifications_get_unread_notification_count( bp_loggedin_user_id() );
$url = bp_core_get_user_domain(bp_loggedin_user_id()) .'notifications/';
 
if ( $theme_location !== $args->theme_location ) {
	return $items;
}
$new_links = array();

if ( is_user_logged_in() ) {
	  
	// only if user is logged-in, do sub-menu link
	$item = array(
		'title'            => $label,
		'menu_item_parent' => $existing_menu_item_db_id,
		'ID'               => 'fugit', // menu name
		'db_id'            => $new_menu_item_db_id,
		'url'              => $url,
		'classes'          => array( 'menu-item' )
	);

	$new_links[] = (object) $item;  // Add the new menu item to our array
	unset( $item ); // in case we add more items below

	$index = count( $items );  // integer, the order number.

// Insert the new links at the appropriate place.
	array_splice( $items, $index, 0, $new_links ); // 0,0 is first position, 1,0 is second, etc

}

return $items;
}
add_filter( 'wp_nav_menu_objects', 'my_notif_link', 10, 2 );

Happy testing 😉