Since posting I have found a partial answer.
I have used $HTTP_HOST and it returns the domain name entered.
However, I get the same result whether I enter
www.drexlercollection.com
or drexlercollection.com
Either way, the string returned is
www.drexlercollection.com.
This is important to know because it will alter the routine I writing for parsing the string to return "drexlercollection" or whatever other strintg I'm looking for.
Thanks again for any help.
Paul