Compound(?) $$variable question.

I 'php-generated' a form that has a variable number of text boxes (depending on user input $usercount). <input type=text name=tbox0> <input type=text name=tbox1> <input type=text name=tbox2> etc... When the form gets posted, I intended to loop through the $HTTP_POST_VARS to get the values. $HTTP_POST_VARS['tbox0'] $HTTP_POST_VARS['tbox1'] $HTTP_POST_VARS['tbox2'] etc... I thought I could use a counter to loop through the data (like this...) $prefix="tbox"; $i=0; while ($i<$usercount){ echo $HTTP_POST_VARS[$$prefix$i]; // I really want [$tbox0], 1, 2, 3, etc. $i++; } Of course this isn't working. Does anyone have any better suggestions? Is this possible? Thanks, mario