PHP Get proxy IP

Recently our PHP website wanted to get the player's IP through a simple $_server["REMOTE_ADDR") unexpectedly get to 127.0.0.1 IP

Because our website is through Nginx Proxy, think of possible to get the player's IP a bit different it

See the $_server[' http_x_forwarded_for ' through this, I changed the code to have no effect

Does not seem to pass over, and then the Internet to find a bit of the original nginx should be set up

Proxy_set_header x-forwarded-for $remote _addr;

Add such a line of code will be able to obtain the IP

Original page http://www.web-jia.com/view.php?a=32

What is node. js? (1)
Qwrap Getting Started Guide
CSS3 Making Windows7 Start Menu
49 Stunning HTML 5 examples (1)
CSS3 Painting: An android Robot!
HTML 50% IE9 Core Intimate or bedfellows
Jscex+jquery UI to create game strength bar
PHP 5.2.10 Release Fixes a number of bugs
2012Q1 Foreign HTML5 mobile development trend
2.1.3 first imitate and then progress
Uncover Google and Facebook's path to development?

PHP Get proxy IP