So recently we have made a change to always require a signature upon shipment arrival because of too many lost shipments by carriers. The modification I am trying to make to the shipping page (and follow through the rest of the checkout process) is to have a checkbox input appear if the customer's address is residential – and if that checkbox is checked by the customer, then they choose to "Opt Out" of this required signature accepting the risks. A note needs to then follow through to checkout confirmation that the customer chose to opt out and accept the risks.

For right now, the "if address is residential" check is set aside. First I'm trying to get a checkbox to control whether some extra information is included in the order or not.

####

This is my tpl_checkout_shipping_default.php file:

PHP Code:
<?php
/**
 * Page Template
 *
 * Loaded automatically by index.php?main_page=checkout_shipping.<br />
 * Displays allowed shipping modules for selection by customer.
 *
 * @package templateSystem
 * @copyright Copyright 2003-2009 Zen Cart Development Team
 * @copyright Portions Copyright 2003 osCommerce
 * @license http://www.zen-cart.com/license/2_0.txt GNU Public License V2.0
 * @version $Id: tpl_checkout_shipping_default.php 14807 2009-11-13 17:22:47Z drbyte $
 */
?>
<div class="centerColumn" id="checkoutShipping">

<?php echo zen_draw_form('checkout_address', zen_href_link(FILENAME_CHECKOUT_SHIPPING, '', 'SSL')) . zen_draw_hidden_field('action', 'process'); ?>

<h1 id="checkoutShippingHeading"><?php echo HEADING_TITLE; ?></h1>
<?php if ($messageStack->size('checkout_shipping') > 0) echo $messageStack->output('checkout_shipping'); ?>

<h2 id="checkoutShippingHeadingAddress"><?php echo TITLE_SHIPPING_ADDRESS; ?></h2>

<div id="checkoutShipto" class="floatingBox back">
<?php if ($displayAddressEdit) { ?>
<div class="buttonRow forward"><?php echo '<a href="' . $editShippingButtonLink . '">' . zen_image_button(BUTTON_IMAGE_CHANGE_ADDRESS, BUTTON_CHANGE_ADDRESS_ALT) . '</a>'; ?></div>
<?php } ?>
<address class=""><?php echo zen_address_label($_SESSION['customer_id'], $_SESSION['sendto'], true, ' ', '<br />'); ?></address>
</div>
<div class="floatingBox important forward"><?php echo TEXT_CHOOSE_SHIPPING_DESTINATION; ?></div>
<br class="clearBoth" />

<?php
  if (zen_count_shipping_modules() > 0) {
?>

<h2 id="checkoutShippingHeadingMethod"><?php echo TABLE_HEADING_SHIPPING_METHOD; ?></h2>

<?php
    if (sizeof($quotes) > 1 && sizeof($quotes[0]) > 1) {
?>

<div id="checkoutShippingContentChoose" class="important"><?php echo TEXT_CHOOSE_SHIPPING_METHOD; ?>
<br/>
<p style="font-size:8pt; font-weight:normal"> <span style="text-decoration:underline; font-weight:bold; color:red">Note:</span> Processing time varies. Most orders are shipped within 1-2 business days pending credit card authorization. All orders including overnight and 2nd-day shipments will ship on the next business day for in-stock items. Special shipping requests should be directed to the Internet Coordinator, ph# (847) 844-8795 x 231.</p>
</div>

<?php
    } elseif ($free_shipping == false) {
?>
<div id="checkoutShippingContentChoose" class="important"><?php echo TEXT_ENTER_SHIPPING_INFORMATION; ?></div>

<?php
    }
?>
<?php
    if ($free_shipping == true) {
?>
<div id="freeShip" class="important" ><?php echo FREE_SHIPPING_TITLE; ?>&nbsp;<?php echo $quotes[$i]['icon']; ?></div>
<div id="defaultSelected"><?php echo sprintf(FREE_SHIPPING_DESCRIPTION, $currencies->format(MODULE_ORDER_TOTAL_SHIPPING_FREE_SHIPPING_OVER)) . zen_draw_hidden_field('shipping', 'free_free'); ?></div>

<?php
    } else {
      $radio_buttons = 0;
      for ($i=0, $n=sizeof($quotes); $i<$n; $i++) {
      // bof: field set
// allows FedEx to work comment comment out Standard and Uncomment FedEx
//      if ($quotes[$i]['id'] != '' || $quotes[$i]['module'] != '') { // FedEx
      if ($quotes[$i]['module'] != '') { // Standard
?>
<fieldset>
<legend><?php echo $quotes[$i]['module']; ?>&nbsp;<?php if (isset($quotes[$i]['icon']) && zen_not_null($quotes[$i]['icon'])) { echo $quotes[$i]['icon']; } ?></legend>

<?php
        if (isset($quotes[$i]['error'])) {
?>
      <div><?php echo $quotes[$i]['error']; ?></div>
<?php
        } else {
          for ($j=0, $n2=sizeof($quotes[$i]['methods']); $j<$n2; $j++) {
// set the radio button to be checked if it is the method chosen
            $checked = (($quotes[$i]['id'] . '_' . $quotes[$i]['methods'][$j]['id'] == $_SESSION['shipping']['id']) ? true : false);

            if ( ($checked == true) || ($n == 1 && $n2 == 1) ) {
              //echo '      <div id="defaultSelected" class="moduleRowSelected">' . "\n";
            //} else {
              //echo '      <div class="moduleRow">' . "\n";
            }
?>
<?php
            if ( ($n > 1) || ($n2 > 1) ) {
?>
<div class="important forward"><?php echo $currencies->format(zen_add_tax($quotes[$i]['methods'][$j]['cost'], (isset($quotes[$i]['tax']) ? $quotes[$i]['tax'] : 0))); ?></div>
<?php
            } else {
?>
<div class="important forward"><?php echo $currencies->format(zen_add_tax($quotes[$i]['methods'][$j]['cost'], $quotes[$i]['tax'])) . zen_draw_hidden_field('shipping', $quotes[$i]['id'] . '_' . $quotes[$i]['methods'][$j]['id']); ?></div>
<?php
            }
?>

<?php echo zen_draw_radio_field('shipping', $quotes[$i]['id'] . '_' . $quotes[$i]['methods'][$j]['id'], $checked, 'id="ship-'.$quotes[$i]['id'] . '-' . str_replace(' ', '-', $quotes[$i]['methods'][$j]['id']) .'"'); ?>
<label for="ship-<?php echo $quotes[$i]['id'] . '-' . str_replace(' ', '-', $quotes[$i]['methods'][$j]['id']); ?>" class="checkboxLabel" ><?php echo $quotes[$i]['methods'][$j]['title']; ?></label>
<!--</div>-->
<br class="clearBoth" />
<?php
            $radio_buttons++;
          }
        }
?>
<?php if ($quotes[$i]['module'] == "United States Postal Service")
echo '<p style="font-size:8pt"><span style="font-size:9pt;color:red; font-weight:bold">*</span> By selecting USPS you agree that seller is not financially liable for any lost packages.</p>';
?>
</fieldset>
<?php
    }
// eof: field set
      }
    }
?>

<?php
  } else {
?>
<h2 id="checkoutShippingHeadingMethod"><?php echo TITLE_NO_SHIPPING_AVAILABLE; ?></h2>
<div id="checkoutShippingContentChoose" class="important"><?php echo TEXT_NO_SHIPPING_AVAILABLE; ?></div>
<?php
  }
?>
<fieldset class="shipping" id="comments">
<legend><?php echo TABLE_HEADING_COMMENTS; ?></legend>
<?php echo zen_draw_textarea_field('comments', '45', '3') . '<br /><em style="margin-left:17px; line-height:130%; color:#F00;"><b>*</b>Sorry, but we do not ship FedEx Ground.</em>'; ?>
</fieldset>
    
    
<br class="clearBoth" />
<fieldset class="shipping" id="optOutSig">
<!-- Opt Out Checkbox -->
<legend>Required Signature on Arrival</legend>
<input name="optOutSig" type="checkbox" value="optout" /> Opt Out of required signature?
</fieldset>


    
<br class="clearBoth" />
<div>
<?php echo "Order->Info[comments]<br/>" . $order->info['comments'] . "<br/>";
      echo "SESSION[comments]<br/>" . $_SESSION['comments']; ?>
</div>

    
<div class="buttonRow forward"><?php echo zen_image_submit(BUTTON_IMAGE_CONTINUE_CHECKOUT, BUTTON_CONTINUE_ALT); ?></div>
<div class="buttonRow back"><?php echo '<strong>' . TITLE_CONTINUE_CHECKOUT_PROCEDURE . '</strong><br />' . TEXT_CONTINUE_CHECKOUT_PROCEDURE; ?></div>

</form>
</div>
And the next step of the checkout, tpl_checkout_payment_default.php:

PHP Code:
<?php
/**
 * Page Template
 *
 * Loaded automatically by index.php?main_page=checkout_payment.<br />
 * Displays the allowed payment modules, for selection by customer.
 *
 * @package templateSystem
 * @copyright Copyright 2003-2006 Zen Cart Development Team
 * @copyright Portions Copyright 2003 osCommerce
 * @license http://www.zen-cart.com/license/2_0.txt GNU Public License V2.0
 * @version $Id: tpl_checkout_payment_default.php 5414 2006-12-27 07:51:03Z drbyte $
 */
?>
<?php echo $payment_modules->javascript_validation(); ?>
<div class="centerColumn" id="checkoutPayment">
<?php echo zen_draw_form('checkout_payment', zen_href_link(FILENAME_CHECKOUT_CONFIRMATION, '', 'SSL'), 'post', ($flagOnSubmit ? 'onsubmit="return check_form();"' : '')); ?>

<h1 id="checkoutPaymentHeading"><?php echo HEADING_TITLE; ?></h1>

<?php if ($messageStack->size('redemptions') > 0) echo $messageStack->output('redemptions'); ?>
<?php if ($messageStack->size('checkout') > 0) echo $messageStack->output('checkout'); ?>
<?php if ($messageStack->size('checkout_payment') > 0) echo $messageStack->output('checkout_payment'); ?>

<?php
  if (DISPLAY_CONDITIONS_ON_CHECKOUT == 'true') {
?>
<fieldset>
<legend><?php echo TABLE_HEADING_CONDITIONS; ?></legend>
<div><?php echo TEXT_CONDITIONS_DESCRIPTION;?></div>
<?php echo  zen_draw_checkbox_field('conditions', '1', false, 'id="conditions"');?>
<label class="checkboxLabel" for="conditions"><?php echo TEXT_CONDITIONS_CONFIRM; ?></label>
</fieldset>
<?php
  }
?>

<?php // ** BEGIN PAYPAL EXPRESS CHECKOUT **
      if (!$payment_modules->in_special_checkout()) {
      // ** END PAYPAL EXPRESS CHECKOUT ** ?>
<h2 id="checkoutPaymentHeadingAddress"><?php echo TITLE_BILLING_ADDRESS; ?></h2>

<div id="checkoutBillto" class="floatingBox back">
<?php if (MAX_ADDRESS_BOOK_ENTRIES >= 2) { ?>
<div class="buttonRow forward"><?php echo '<a href="' . zen_href_link(FILENAME_CHECKOUT_PAYMENT_ADDRESS, '', 'SSL') . '">' . zen_image_button(BUTTON_IMAGE_CHANGE_ADDRESS, BUTTON_CHANGE_ADDRESS_ALT) . '</a>'; ?></div>
<?php } ?>
<address><?php echo zen_address_label($_SESSION['customer_id'], $_SESSION['billto'], true, ' ', '<br />'); ?></address>
</div>

<div class="floatingBox important forward"><?php echo TEXT_SELECTED_BILLING_DESTINATION; ?></div>
<br class="clearBoth" />
<?php // ** BEGIN PAYPAL EXPRESS CHECKOUT **
      }
      // ** END PAYPAL EXPRESS CHECKOUT ** ?>
      
<fieldset id="checkoutOrderTotals">
<legend id="checkoutPaymentHeadingTotal"><?php echo TEXT_YOUR_TOTAL; ?></legend>
<?php
  if (MODULE_ORDER_TOTAL_INSTALLED) {
    $order_totals = $order_total_modules->process();
?>
<?php $order_total_modules->output(); ?>
<?php
  }
?>
<a style="float:right; margin-right:60px" href="customer_loyalty_program.html" target="_blank">(What's this?)</a>
</fieldset>

<?php
  $selection =  $order_total_modules->credit_selection();
  if (sizeof($selection)>0) {
    for ($i=0, $n=sizeof($selection); $i<$n; $i++) {
      if ($_GET['credit_class_error_code'] == $selection[$i]['id']) {
?>
<div class="messageStackError"><?php echo zen_output_string_protected($_GET['credit_class_error']); ?></div>

<?php
      }
      for ($j=0, $n2=sizeof($selection[$i]['fields']); $j<$n2; $j++) {
?>
<fieldset>
<legend><?php echo $selection[$i]['module']; ?></legend>
<?php echo $selection[$i]['redeem_instructions']; ?>
<div class="gvBal larger"><?php echo $selection[$i]['checkbox']; ?></div>
<label class="inputLabel"<?php echo ($selection[$i]['fields'][$j]['tag']) ? ' for="'.$selection[$i]['fields'][$j]['tag'].'"': ''; ?>><?php echo $selection[$i]['fields'][$j]['title']; ?></label>
<?php echo $selection[$i]['fields'][$j]['field']; ?>
</fieldset>
<?php
      }
    }
?>

<?php
    }
?>

<?php // ** BEGIN PAYPAL EXPRESS CHECKOUT **
      if (!$payment_modules->in_special_checkout()) {
      // ** END PAYPAL EXPRESS CHECKOUT ** ?>
<fieldset>
<legend><?php echo TABLE_HEADING_PAYMENT_METHOD; ?></legend>

<?php
  if (SHOW_ACCEPTED_CREDIT_CARDS != '0') {
?>

<?php
    if (SHOW_ACCEPTED_CREDIT_CARDS == '1') {
      echo TEXT_ACCEPTED_CREDIT_CARDS . zen_get_cc_enabled();
    }
    if (SHOW_ACCEPTED_CREDIT_CARDS == '2') {
      echo TEXT_ACCEPTED_CREDIT_CARDS . zen_get_cc_enabled('IMAGE_');
    }
?>
<br class="clearBoth" />
<?php } ?>

<?php
  $selection = $payment_modules->selection();

  if (sizeof($selection) > 1) {
?>
<p class="important"><?php echo TEXT_SELECT_PAYMENT_METHOD; ?></p>
<?php
  } elseif (sizeof($selection) == 0) {
?>
<p class="important"><?php echo TEXT_NO_PAYMENT_OPTIONS_AVAILABLE; ?></p>

<?php
  }
?>

<?php
  $radio_buttons = 0;
  for ($i=0, $n=sizeof($selection); $i<$n; $i++) {
?>
<?php
    if (sizeof($selection) > 1) {
        if (empty($selection[$i]['noradio'])) {
 ?>
 
<?php echo zen_draw_radio_field('payment', $selection[$i]['id'], ($selection[$i]['id'] == $_SESSION['payment'] ? true : false), 'id="pmt-'.$selection[$i]['id'].'"'); ?>
<?php   } ?>

<?php
    } else {
        
?>
<br/>
<?php echo zen_draw_hidden_field('payment', $selection[$i]['id']); ?>
<?php
    }
?>
<label for="pmt-<?php echo $selection[$i]['id']; ?>" class="radioButtonLabel"><?php 
if ($selection[$i]['module']=="Contact Me"){
//echo $selection[$i]['module'];
echo 'Contact Me';}
else
{echo $selection[$i]['module'];}
  ?></label>

<?php
    if (defined('MODULE_ORDER_TOTAL_COD_STATUS') && MODULE_ORDER_TOTAL_COD_STATUS == 'true' and $selection[$i]['id'] == 'cod') {
?>
<div class="alert"><?php echo TEXT_INFO_COD_FEES; ?></div>
<?php
    } else {
      // echo 'WRONG ' . $selection[$i]['id'];
?>
<?php
    }
?>
<br class="clearBoth" />

<?php
    if (isset($selection[$i]['error'])) {
?>
    <div><?php echo $selection[$i]['error']; ?></div>

<?php
    } elseif (isset($selection[$i]['fields']) && is_array($selection[$i]['fields'])) {
?>

<div class="ccinfo">
<?php
      for ($j=0, $n2=sizeof($selection[$i]['fields']); $j<$n2; $j++) {
?>
<label <?php echo (isset($selection[$i]['fields'][$j]['tag']) ? 'for="'.$selection[$i]['fields'][$j]['tag'] . '" ' : ''); ?>class="inputLabelPayment"><?php echo $selection[$i]['fields'][$j]['title']; ?></label><?php echo $selection[$i]['fields'][$j]['field']; ?>
<br class="clearBoth" />
<?php
      }
?>
</div>
<br class="clearBoth" />
<?php
    }
    $radio_buttons++;
?>
<br class="clearBoth" />
<?php
  }
?>

</fieldset>
<?php // ** BEGIN PAYPAL EXPRESS CHECKOUT **
      } else {
        ?><input type="hidden" name="payment" value="<?php echo $_SESSION['payment']; ?>" /><?php
      }
      // ** END PAYPAL EXPRESS CHECKOUT ** ?>

<?php
if(isset($_POST['optOutSig']) && $_POST['optOutSig'] == 'optout') {
    echo "<div><p>Checkbox was checked</p></div>";
    if (strpos($_SESSION['comments'], 'Opted Out of Signature') !== false) {} else {$_SESSION['comments'] .= "\n\nOpted Out of Signature.";}
} else {}
?>

<fieldset>
<legend><?php echo TABLE_HEADING_COMMENTS; ?></legend>
<?php echo zen_draw_textarea_field('comments', '45', '3'); ?>
</fieldset>

<div class="buttonRow forward"><?php echo zen_image_submit(BUTTON_IMAGE_CONTINUE_CHECKOUT, BUTTON_CONTINUE_ALT, 'onclick="submitFunction('.zen_user_has_gv_account($_SESSION['customer_id']).','.$order->info['total'].')"'); ?></div>
<div class="buttonRow back"><?php echo TITLE_CONTINUE_CHECKOUT_PROCEDURE . '<br />' . TEXT_CONTINUE_CHECKOUT_PROCEDURE; ?></div>

</form>
</div>
####

So to try to pull out my additions to these files and explain how I'm approaching it:

This is the checkbox field I've tried to add to the shipping page that should let the customer choose if they want to "Opt Out" of signing.
Code:
<fieldset class="shipping" id="optOutSig">
<!-- Opt Out Checkbox -->
<legend>Required Signature on Arrival</legend>
<input name="optOutSig" type="checkbox" value="optout" /> Opt Out of required signature?
</fieldset>

On the payment page I've added the following to try to check if the box was checked or not, and then add a note about Opting out if they did:
Code:
<?php
if(isset($_POST['optOutSig']) && $_POST['optOutSig'] == 'optout') {
    echo "<div><p>Checkbox was checked</p></div>";
    if (strpos($_SESSION['comments'], 'Opted Out of Signature') !== false) {} else {$_SESSION['comments'] .= "\n\nOpted Out of Signature.";}
} else {}
?>
####

From looking at these pages though, the "Continue" button on the shipping page does not have type="submit" so I'm not sure if that page's form actually gets submitted when moving on the the payment page. If it doesn't, then I can't use $_POST['optOutSig'] can I?

I don't necessarily need the note to show up until the order is fully submitted. So it doesn't need to be visible on any of the checkout process stages, but for testing purposes I have some debug-type outputs appearing on these pages for now. Even when I submit from step 3: "Order Confirmation" (where the button then seems to actually be a submit input) it still does not seem that $_POST['optOutSig'] was recognized from the form on the shipping page.

####

To try to sum up what I'm attempting here, I would like a checkbox on the shipping page (step 1) of the checkout process to add some additional content (whether it's an extra line in the order comments, a whole additional div in the order confirmation email, any output at all really) if it is checked – and do nothing if it is not checked.