How to redirect to the page of an infoblock element by its id?

Question

1C-Bitrix

The site has a trade catalog. Product links look like this: domain/catalog/section/product. Product links change from time to time. And I would like to set a link on a third-party portal and make it live as long as possible.

I would like to specify a link with the identifier of the infoblock element (product), for example, domain/links/id-123, and using it the user will be redirected to the actual product page.
Probably there is a ready-made solution for such redirection. But I couldn't find it.
Well, in theory, as I imagine, having the specified link with the id, it should not be difficult to redirect to the actual link.

Please let me know what is the solution here.

Answer 1

Solved the issue on my own. Created a separate page site.ru/redirect/ and added the code below. Now the site.ru/redirect/?id=123 link will redirect to the product with id 123. If no such product is found, it will redirect to site.ru/404/.
For IBLOCK_ID, instead of 17, set your infoblock id.

<?
$idItem = $_REQUEST['id'];
if (!empty($idItem)){
  $res = CIBlockElement::GetList(array(), array('ID'=>$idItem, 'IBLOCK_ID'=>'17'), false, false, array('DETAIL_PAGE_URL'));
  if ($arElement = $res->GetNext())
  {
     echo "<pre>"; print_r($arElement); echo "</pre>";
     LocalRedirect($arElement[DETAIL_PAGE_URL]);
  } else {
    LocalRedirect("/404/");
  }
} else {
  LocalRedirect("/404/");
}
?>