getenv vs. $_SERVER

[blackhorse]

HTTP_USER_AGENT, REMOTE_ADDR, HTTP_REFERER

I am trying to get these values, I will use $SERVER to get them. But what is the difference to use getenv or $SERVER to get the above values? Some notes said use $SERVER due to getenv not works in all cases. So should we drop getenv and use $SERVER, that is the advice?

Thanks!

[konrad]

Here is a comment from manual

renko at <remove>virtual-life dot net
08-Nov-2004 03:40
The function 'getenv' does not work if your Server API is ASAPI (IIS).

So, try to don't use getenv('REMOTE_ADDR'), but $_SERVER["REMOTE_ADDR"].