The O'Reilly PHP Devcenter has a new article posted seeking to help you out with your form handling with a listing of several tips to get started.

Some of the topics mentioned are: using $_SERVER['PHP_SELF'] as the form action, using brackets for a "multivalued form parameter", dividing up the display/logic/validation of the form into their components.

They also mention using PHP to your advantage when printing out form elements as well as looking into the HTML_QuickForm PEAR class to help you in your quest.