PHP variable persistence

I am building a site that has two different
looks depending upon whether or not a certain
plugin is installed(Macromedia Flash). Right
now, I have two sets of pages that I would
like to unify. What I would like to do is set
a variable called $flash to true or false
corresponding to whether or not the plugin is
installed on the client side. My question is,
how do I transmit the state of this variable
from page to page?

There are a few ways to achieve this.

1. Use a cookie to store the variable(s)

2. Include a basic PHP script in each page to check for the plugin each time.

3. Store a users session file on the server with the variable.

4. You could even try and play around with the query string of the pages.
ie - mypage.html?flash=no

Hope this helps

dynamic1,

Thanks for the post. I had already considered
those methods plus the method of setting a
server-side environment variable. Ideally,
what I would like to find is a technique
similar to the form "GET" method whereby
variables are passed in the HTTP header and
are not exposed to the user. In the absence
of such, I guess I will resort to cookies.

Have you thought about using the 'post' method in html forms.

Hope this helps

Falcon