Making a variable out of variables?

Thanks for all the responses on my previous question! Anyhow - I decided to follow Douglas suggestion and scrap IP checking, and instead use cookies - so I have run into another problem, of course. How can I set a variable to be a set of variables? Let me show you: $Row[1] = 3 $Row[2] = 5 $cheese = cheddar$row[1]$row[2] And I want it to return cheddar35. Can this be done? If so, ho do I set the $cheese variable? Thanks for your help - I've learned lots of PHP so far! /Mattias