Multple Form Values with Same Name

I'm working on converting a pre-existing website for a company, from something called Lasso, into PHP. This domain name registration site uses the same form value, "$Suffix" as the checkbox values for all the TLDs they offer. I was originally under the impression PHP would put them all into an array, $Suffix[0] $Suffix[1] etc... I assumed it, but never tried it cuz I didnt need to till now. Is this the way it's suppose to be, or is it returned another way? Right now, $Suffix returns the value of only one of the checkboxes (the last one in the queries list I assume). ~Tim