function bp_get_last_activity( $user_id = 0 ) {

		if ( empty( $user_id ) )
			$user_id = bp_displayed_user_id();

		$last_activity = bp_core_get_last_activity( bp_get_user_last_activity( $user_id ), __('active %s', 'buddypress') );

		/**
		 * Filters the 'active [x days ago]' string for a user.
		 *
		 * @since 1.5.0
		 * @since 2.6.0 Added the `$user_id` parameter.
		 *
		 * @param string $value   Formatted 'active [x days ago]' string.
		 * @param int    $user_id ID of the user.
		 */
		return apply_filters( 'bp_get_last_activity', $last_activity, $user_id );
	}