You can use this page to test your input forms. Just make sure your action tag is set to this page's URL, and do a submit on your form.
form_handler() creates a list of all form data submitted by any form. The output can then be emailed to a site's system administrator, or saved to a file. form_handler_generator() can assist you in the making of a more customized solution for any particular form. Just remember to check your checkboxes or they will not be noticed.