Zen Cart Discount Preview
A Zen Cart™ mod which allows you to
display order total discounts on the shopping cart page (and in
the shopping cart sidebox, if desired). In this way, discounts
which are normally not visible until the second page of checkout
are visible earlier.
Relevance: Zen Cart™ 1.3.5 and forward. Please specify your Zen Cart version when ordering.
Cost: $30 ($35 to show the revised subtotal).
Buy Now!
Installation: click here
Support Thread: My commercial software is not supported on the Zen Cart forum. Please email me questions instead.
See it Live: Go to
my demo shop and add ten of any item to your cart (excluding gift certificates).
You will immediately see the discount because of
Discount Preview. Without
Discount Preview, the discount would not be visible until
the second page of checkout.
Bugs: click here
Overview:
This mod permits customers to preview the order total discounts they
will receive from the built-in Group Discount module, as well as from the
Better Together and
Quantity Discounts contributions
and the
Combination Discounts,
Big Spender
and
Big Chooser
extensions.
You may preview whatever combinations of discounts is configured
for your shop.
Shopping Cart Page With the Discount Preview Extension
Shopping Cart Sidebox With Discount Preview Extension
Ordinary Shopping Cart Page
The discounts are shown as line items below the subtotal on the shopping cart page.
No summary computation is made, since these line items are designed to appear the
way they will on page two of the checkout.
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I charge $30 for the basic version of
Discount Preview for Zen Cart,
and $35 for the version which shows the revised subtotal.
This money helps fund the work I do on free software, such
as Quantity Discounts and Better Together.
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Bugs
Installation Instructions:
- Back up everything! Try this in a test environment prior to installing
it on a live shop.
- Copy the contents of the unzipped folder to the root directory of your
shop.
The names of these files reflect a template name of "custom." If you are
using a different template name, please change file paths using "custom" to
use your template name instead.
- If you use the Shipping Estimator feature to display an estimate of
shipping costs in the cart, you MUST change the file
includes/modules/shipping_estimator.php.
Look for a line that says
require(DIR_WS_CLASSES . 'order.php');
and change this to
require_once(DIR_WS_CLASSES . 'order.php');
- If you have also ordered
Checkout Candy or
Checkout Candy for Combination Discounts
from me, you will have to merge the files
./includes/templates/custom/templates/tpl_shopping_cart_default.php
./includes/templates/custom/css/shopping_cart.css
Installation Problems:
The most common installation problems for this module are as follows:
- Forgetting to copy the files from includes/modules/custom to includes/modules/YOUR_TEMPLATE if your template is not named "custom"
- If you see the message that looks something like, "Fatal error: Cannot redeclare class order in /var/www/web4/web/includes/classes/order.php on line 20", you need to look for statements that do
require(DIR_WS_CLASSES . 'order.php');
and change them to
require_once(DIR_WS_CLASSES . 'order.php');
This must be done in the following places:
- includes/modules/shipping_estimator.php
- includes/modules/payment/paypalwpp.php (if you are using PayPal
Website Payments Pro).
If you are having trouble installing this module, you should also refer
to my
Guide to Mod Installation on Zen Cart.
I'm also happy to install most of my mods for a fee.
Tips
- If you've never installed a Zen Cart mod before, please read my
Guide to Mod Installation on Zen Cart.
- IMPORTANT! If you are using Quantity Discounts, and you're
using the
marketing suggestions
on the product info page, please be sure you have the latest code:
<?php
$value = "ot_quantity_discount.php";
include_once(zen_get_file_directory(DIR_WS_LANGUAGES . $_SESSION['language'] .
'/modules/order_total/', $value, 'false'));
include_once(DIR_WS_MODULES . "order_total/" . $value);
$discount = new ot_quantity_discount();
echo '<div class="content" id="discountPolicy">';
echo '<h2>' . STORE_POLICY . '</h2>';
echo $discount->get_html_policy();
echo '<br /></div>';
?>
(i.e. both "include" statements should be "include_once")
- To place a message at the top of the shopping cart page near the undiscounted
total, edit the file customize the file includes/languages/english/shopping_cart.php, and set TEXT_INFORMATION to something like "See bottom of page for discount information."
-
If you use the shopping cart sidebox, you should define the following new
CSS class in includes/templates/custom/css/stylesheet.css
.cartBoxDiscount {
text-align: right;
font-weight: bold;
}
This is how your discount information will appear in the shopping_cart sidebox.
-
If you have any problems after installing this mod, the first thing you
should do is delete
includes/templates/custom/sideboxes/tpl_shopping_cart.php
Although this works well with a freshly installed cart,
it is possible that the logic in this file will not interoperate with
other modifications you have made. You may need to turn off the
shopping cart sidebox or simply use some text in here telling the customer
to go to the shopping cart page to see discount information.
The next tip describes how to do this.
-
If you are using the shopping cart sidebox
but would prefer not to indicate the amount of the discount
(or have interoperability problems as described above),
customize the file
includes/templates/template_default/sideboxes/tpl_shopping_cart.php,
copying it to
includes/templates/custom/sideboxes/tpl_shopping_cart.php.
At the bottom of the file, right before the line
$content .= '</div>';
insert the line
$content .= CART_INFORMATION_SIDEBOX;
If you have used CSS styling in the main page of shopping_cart.php, you
can make the sidebox look the same by using this line instead:
$content .= '<div id="cartInstructionsDisplay" class="content">';
$content .= CART_INFORMATION_SIDEBOX;
$content .= '</div>';
CART_INFORMATION_SIDEBOX is a string you have defined in includes/languages/english/extra_definitions/discount_preview.php
like this:
define('CART_INFORMATION_SIDEBOX','Discounts displayed in shopping cart');
- The shopping cart sidebox will not display the discount information when the shopping
cart page is being displayed.
- If you use the shopping cart sidebox, my recommendation is
to run with it not displayed on the shopping cart page.
Use Admin->Configuration->Layout Settings->Shopping Cart Box Status, and set this value to 2.
- Want to show off your discounts even more using red lettering, yellow background or some other effect? See my Highlighting your Discounts tip.
Showing the revised subtotal
Want see the subtotal after discounts? Some people like this and others don't, so
I make it optional. Just ask if you want it.
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I charge $30 for the basic version of Discount Preview for Zen Cart,
and $35 for the version which shows the revised subtotal.
The fee covers software only; installation is extra if you require help.
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