Can I show input data whrn back to the Input Form?

Dear all, In my php program, when user click "submit" on a form, it comes to a confirmation page, showing what the user entered in the form. If the user find want to re-enter the information, he press "Back" on the browser. Then it comes back to the form, with empty input. I want to ask: Can the form show the previously input data, when the user goes "back" from the confirmation page? If no, any other method to do that? Thanks for your help. Regards, Hakkan Lui