HTTP Status code for language redirect

Question

I wonder which HTTP Status code I should have to send in language redirects.

I have the following php code to redirect via HTTP headers to most important language in

Answer 1

HTTP 303, because it have the most suitable formulation - See Other (302-Moved Temporarily and 301 - Moved Permanently). Actually HTTP 303 response in this situation to ensure that the web user's browser can then safely refresh the server response without causing the initial HTTP POST request to be resubmitted.