Problem with $_SERVER['REQUEST_URI'];

[etrader]

In my nginx server, $_SERVER['REQUEST_URI']; does not work, and returns
nothing. When using getenv("REQUEST_URI"); it will returns the url of
the current page instead of the reffering url. And in this case, it will
return the current filename (e.g. /test.php) not the full url. I have
tested this on apache, and there is no problem; thus it is something
related to nginx setting. Any idea?

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,204171,204171#msg-204171