bp_get_total_online_member_count()

	function bp_get_total_online_member_count() {

		global $members_template;

		$total = 0;

		$members_args = array(
			'user_id'         => 0,
			'type'            => 'online',
			'max'             => 999,
			'populate_extras' => false,
			'search_terms'    => false,
		);

		$old_members_template = $members_template;
		if ( bp_has_members( $members_args ) ){
			$total = $members_template->total_member_count;
		}
		$members_template = $old_members_template;
		return $total;
	}