Fuser::getUserIdById

static function getUserIdById($fuserId): int
{
	$fuserId = (int)$fuserId;
	if ($fuserId <= 0)
	{
		return 0;
	}
	$row = InternalsFuserTable::getRow([
		'select' => [
			'ID',
			'USER_ID',
		],
		'filter' => [
			'=ID' => $fuserId,
		],
		'order' => [
			'ID' => 'DESC',
		],
	]);
	return (int)($row['USER_ID'] ?? 0);
}