FuserTable::getUserById

static function getUserById($id)
{
	$id = (int)$id;
	if ($id <= 0)
		return false;
	$fuserIterator = self::getList(array(
		'select' => array('USER_ID'),
		'filter' => array('=ID' => $id)
	));
	if ($fuser = $fuserIterator->fetch())
		return (int)$fuser['USER_ID'];
	return false;
}