How to submit 0 if checkbox is unchecked and submit 1 if checkbox is checked in HTML

Question

How to submit value 1 if a checkbox in a checkbox array is checked, and submit 0 if it\'s unchecked? I tried this but no luck. I am trying to grab this array in a php array

Answer 1

Simplest one, no javascript required, just put a hidden input before the checkbox:

Inputs need to have the same name. If the checkbox is checked then value 1 will be submitted, otherwise value 0 from the hidden input.

Your case javascript solution, no hidden inputs needed:

PHP solution, no hidden inputs needed:

EDIT: the javascript solution is not valid anymore as of jquery 1.6. Based on this, a more proper solution is the following: