Mod_Rewrite / URL to Querystring

[JasonHarper]

Hello!

I'm sure I'm asking about a topic that has been answered but I can't seem to find the answer.  I know mod_rewrite can be used to covert a querystring to a URL (i.e., /?string=TEST --> /string/TEST) but I'm trying to go the other way around.  Here's my example:

 

User goes to:  http://www.mydomain.com/login/?id=12345

 

The ID is what identifies the customer so I know which database to reference.  What I would prefer to do is replace that with a friendly name (that I will in turn use on the back end to lookup their customer ID).  So, two questions....  How do I configure mod_rewrite so the customer can enter:  http://www.mydomain.com/login/CompanyName and how do I capture the CompanyName value in PHP?

 

Thank you so much!!

Jason