Please help a novice

[mbparrinello]

Hello, I am trying to add something to this php script and I don't know how...The following is a validation type script which is used within an online store.  It's purpose is to make sure that when a person chooses a certain size of mattress, that person can then remove a certain size of box spring - and the size must match or they get an error message in their cart via this validation.  This is in a "checkbox" form and I need to add the ability for the person to choose "no thanks"  which would include the box spring..(change their mind), and still allow this validation to work.  If you need to see this in action, please go to http://www.bedstore.com/store/index.php?main_page=product_info&cPath=1_9&products_id=2

 

Thanks for any help

 

<?php

 

function valid_cart(&$reason) {

  $products = $_SESSION['cart']->get_products();

  $total = 0;

 

  for ($i=0, $n=sizeof($products); $i<$n; $i++) {

      $no_foundation = 0;

      // no foundation attribute id is 2

      // values: 6 (full), 8 (King), 7 (Queeen), 5 (Twin)

      if (isset($products[$i]['attributes']['2'])) {

          $no_foundation = $products[$i]['attributes']['2'];

      }

      // size attribute id is 1

      // values 1 (Twin), 2 (Full), 3 (Queen), 4 (King)

      $size = 0;

      if (isset($products[$i]['attributes']['1'])) {

          $size = $products[$i]['attributes']['1'];

      }

      if ($no_foundation != 0) {

          if ($no_foundation == 6 && $size == 2) continue;

          if ($no_foundation == 8 && $size == 4) continue;

          if ($no_foundation == 7 && $size == 3) continue;

          if ($no_foundation == 5 && $size == 1) continue;

          $reason = VALID_FAIL; 

          return false;

      }

  }

  return true;

}

?>