$_SERVER["REQUEST_URI"] with nginx proxy server --> get rewritten page urls

Hello

I am using nginx as reverse proxy server (front-end server) + apache as back-end server.

I notice I could NOT get the rewritten url output in php (like www.example.com/something/page/) with $_SERVER[“HTTP_HOST”].$_SERVER[“REQUEST_URI”] in nginx but it works in apache.

Note: The nginx rewrite works fine in the url but the problem is the output in php code.

I am getting such un-rewritten urls like www.example.com/index.php?a=something&b=page with $_SERVER[“HTTP_HOST”].$_SERVER[“REQUEST_URI”]

Can someone please help if I am doing something wrong?

This is the proxy part of my nginx

location ~ \.php$ {
     proxy_pass http://127.0.0.1:8080;
     proxy_set_header Host $http_host;
     proxy_set_header X-Real-IP $remote_addr;
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     proxy_set_header X-Forwarded-Proto $scheme;
}