[PHP] Sessions /Cross Domain

[David Buerer]

Are sessions domain specific?
 
What I mean is this.
 
Suppose I have two websites:
    secure.web.com
    www.web.com <http://www.web.com> 
and both web sites point to the same set of data.
 
If I looking at web page http://www.web.com/index.html
<http://www.web.com/index.html>  and have a set of session variables defined
and then I call the page https://secure.web.com/index.html
<https://secure.web.com/index.html>  do I still have access to the same
session variables?