Budget: 1000 UAH Deadline: 1 day
the good. As I understood I need to make a request to the site 2 from the site 1 to find out where to redirect. At the same time, that the browser itself does not make a redirect to the site 2 and immediately to the site 3. You can make this chain of challenges on php to find out where to make the redirect. Transfer it to Ajax and redirect it to the browser by a new link.