bp_groups_get_invited_by( int $user_id = false, int $group_id = false )

function bp_groups_get_invited_by( $user_id = false, $group_id = false ) {
	global $groups_template;

	if ( empty( $user_id ) && bp_displayed_user_id() ) {
		$user_id = bp_displayed_user_id();
	}

	if ( empty( $group_id ) ) {
		$group =& $groups_template->group;
	} else {
		$group = groups_get_group( $group_id );
	}

	if ( empty( $user_id ) || empty( $group ) ) {
		return false;
	}

	$member = new BP_Groups_Member( $user_id, $group->id );

	$inviter = array(
		'id'   => $member->inviter_id,
		'name' => bp_core_get_user_displayname( $member->inviter_id ),
		'url'  => bp_core_get_user_domain( $member->inviter_id ),
	);

	return apply_filters( 'bp_groups_get_invited_by', $inviter, $group->id );
}