Why does $_SERVER[“SERVER_PROTOCOL”] show HTTP/1.0 when the client spoke HTTP/1.1

Question

I\'m trying to know the HTTP version the user used to connect to my server. The code at http://test.yccau.com (PHP 5.3.26 and Apache 2.2.24) looks like this:

Answer 1

Interesting problem! You have two connections here because you have a end-point proxy in between. The request from your version of nginx to apache is going over HTTP 1.0.

CLIENT <---- (HTTP 1.1) ----> NGINX <----- (HTTP 1.0) ----> SERVER

Nginx 1.1.4 onwards supports HTTP 1.1 to upstream servers.