find out information about where visitors come from

[woocha]

hey guys,

 

I am looking for a way to find out information about the referring site a user clicked through to get to my site.  Is that possible and if so, How?

 

Ideally, I am looking for:

Site Domain Name

The referral URL

Meta information of the page

 

I believe I can get this stuff from analytics software, but I am trying to think of a way to do it in my own script.  Is it possible and does anyone have any ideas to point me in the right direction?

 

thanks