[thelist] beginner PHP question

I know this is a beginner PHP question, but I just can't find the answer in
all the tutorials on the net.

This has to do with the way PHP handles forms. I know that each entry in a
form is available to me by its name
If I have an input called "LastName", I can use $LastName to retrieve the
data. And so far I've been using that, but it's just not good enough.

Aren't the entries from a form available to me as an array so that I can
loop through them? It would save me loads of coding, but all the tutorials
Im seeing are too simple to need that.

Nicole