How to send variable from page along with Ulogin?

Question

PHP

Hello. If someone has already solved a similar problem, maybe he knows how to do it - there is a page generated by id, and there is a next page that takes information from the previous one by id. But during authorization, Ulogin sends its data, and, of course, id is not caught by post and get along with the uri redirect (to data-ulogin).

Answer 1

$_SESSION / $_COOKIE ?