How to do two POST requests for visitors with JS disabled on one submit button?

Question

I got help with solving a problem in this thead: Redirect with POST data. Now that I decided that the whole site and even this function must work when JS is disabled I need

Answer 1

If you want to make the browser to re-send the data of a HTTP Post request to another URI, the HTTP/1.1 protocol offers the 307 (temporary redirect) response status code to signal such to the HTTP-client (Browser):

header('HTTP/1.0 307 Temporary Redirect',$replace=true,307);
header('Location: some_new_url_here');

Read the specs carefully and see the notes on the 302 status as well.

It's much more useful to handle the payment over an API on server-side instead of risking a user being irritated by additional messages displayed by the browser where the user must actually decide whether or not the additional redirect is to be performed.