Название сайта в конце title

<title><?$APPLICATION->ShowTitle()?> | <?=GetMessage('SITE_NAME')?></title>

use Bitrix\Main\SiteTable;

...

$res = SiteTable::getById("s1");
$siteData = $res->Fetch();

if (strlen($APPLICATION->GetPageProperty("title")) > 0) {
   $title = $APPLICATION->GetPageProperty("title") . " | " . $siteData["NAME"];
}
elseif (strlen($APPLICATION->GetTitle()) > 0) {
   $title = $APPLICATION->GetTitle() . " | " . $siteData["NAME"];
}
else {
   $title = $siteData["NAME"];
}
$APPLICATION->SetPageProperty("title", $title);