SiteTable::getSiteIdByHost

static function getSiteIdByHost($host)
{
	static $hosts = null;

	if ($hosts === null)
	{
		$hosts = static::getList([
			'select' => ['ID', 'HOST'],
			'filter' => [
				'=ACTIVE' => 'Y'
			]
		])->fetchAll();
		$hosts = array_combine(
			array_column($hosts, 'HOST'),
			array_column($hosts, 'ID')
		);
	}

	return isset($hosts[$host]) ? $hosts[$host] : null;
}