If checkbox not checked: field should be empty

Hope you can understand this subject.

I have a number of checkboxes, with teh possibility to check various options

But if a checkbox is not checked, teh email shows teh ID of this checkbox

Themales 1 {themales_1}
Themales 2 {themales_2}
Themales 3 {themales_3}
Themales 4 Short Game dd 29-12-2013
Themales 5 {themales_5}
Themales 6 {themales_6}

In other words, if e.g. Themales 1 is not checked, {themales_1} should not be visible

Hi Bob,
I found this topic

http://www.chronoengine.com/forums/index.php?option=com_chronoforums&cont=posts&f=2&t=88211&p=305771&hilit=checkbox+null#p305771

This solved the issue I had....

Code:

<?php
$checkbox_array = array (
'themales_1',
'themales_2',
  // add more checkbox names here
);
foreach ( $checkbox_array as $c ) {
  if ( !isset($form->data[$c]) || !$form->data[$c] ) {
    $form->data[$c] = '';
  }
}
?>