Nginx到Apache为PHP重新路由

I'm trying to use both Nginx and Apache concurrently, and have the need to use PHP to execute a contact script.

I have set Apache to listen on port 8080, while Nginx is listening on port 80.

My first attempt was to do this within the config of Nginx:

location ~ \.php$ {
    proxy_pass http://127.0.0.1:8080;
}

However when I attempted to execute the script online, it produced the following:

http://puu.sh/aCy05/d072e3052d.png

How do I configure Nginx so that it redirects the request through Apache (running PHP) and executes the script?