Listing all form variables?

[Anon]

I have a large HTML form with dynamically generated variable names, i.e. <INPUT TYPE=image NAME=ss_4303 src=...

I'd like to be able to list all the variables that were sent to my php code using the form. I know I can ask for $ss_4403 but how can I tell ahead of time which variables were sent?

[junebug]

foreach($HTTP_POST_VARS as $key => $val){
print "$key<br>";
}

or $HTTP_GET_VARS if you are using the get method.

[Anon]

Thanks!