I have a signup form with more than 15 input fields. After submitting the form, it will send to the second page for confirmation. In the confirmation page will like to put a back button to redirect back to the previous page. However when I click on the back button all my input values are gone. Understand that I can use session to store the values and echo it in the text fields. But I have more than 15 fields in the form which is very time-consuming. So is there any method like url caching, header expiry or better way to store the user value?