Access::getSiteId

static function getSiteId(): ?string
{
	try
	{
		$site = SiteTable::getList([
			'select' => ['LID', 'SERVER_NAME', 'NAME', 'CHARSET' => 'CULTURE.CHARSET'],
			'filter' => ['=DEF' => 'Y', '=ACTIVE' => 'Y'],
		])->fetch();
	}
	catch (ObjectPropertyException|ArgumentException|SystemException $e)
	{
		return null;
	}

	return $site ? $site['LID'] : null;
}