How to display all users bound to an element?

Question

1C-Bitrix

Good afternoon!
Question.
There is an element, several Users are bound to it through a custom property,
the ID of the element to which users are bound. Do you know how to display the IDs of all users bound to this element?

Answer 1

CUser::GetList

$arFilter = array(
   '=UF_ELEMENT' => $iElementId
);
$elementsResult = CUser::GetList(($by="ID"), ($order="DESC"), $arFilter);