Best way to code a shopping cart consisting of items with different properties

This is an interview question. Interviewer wanted a scalable solution

Goal is to find value of shopping cart. Cart could have 3 different types of items(Physical,Digital,URL).

Only Physical Items have a shipping address.

Only Digital items have a redeemable code that is used in a merchant site.

Only URL items have a URL that gives access to some online resource.

I’ve suggested having an Item class with price property which is extended by classes PhysicalItem, DigitalItem, UrlItem. Objects of these classes added to list which is iterated over to find the total order amount. Interviewer wasn’t impressed.

Is there any good design pattern/approach that is best applied here? Price Comparison Site and Shopping Search Engine

Why are you selling this site?
I need quick cash for emergency family reason

How is it monetized?
Affiliate programs ( and and also Amazon associates.

Does this site come with any social media accounts?

How much time does this site take to run?
Since 2015

What challenges are there with running this site?
Hosting fee. need good vps or dedicated server to run it to the max.

Changing the Shopping cart Table order / VAT disappeared

I want to change the column order in the Shopping cart table. I want to exchange the Posititions of the Sum and VAT Column so that the Sum is the Last position. I guest the right php Template is the cart.php. Also the VAT name disappeared somehow in my column. I have VAT activated in all of my plugins and settings but it wont show :S I would be really thankful if the Pros out there could help me 🙂

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    <?php /**  * Cart Page  *  * This template can be overridden by copying it to yourtheme/woocommerce/cart/cart.php.  *  * HOWEVER, on occasion WooCommerce will need to update template files and you  * (the theme developer) will need to copy the new files to your theme to  * maintain compatibility. We try to do this as little as possible, but it does  * happen. When this occurs the version of the template file will be bumped and  * the readme will list any important changes.  *  * @see  * @package WooCommerce/Templates  * @version 3.8.0  */  defined( 'ABSPATH' ) || exit;  do_action( 'woocommerce_before_cart' ); ?>  <form class="woocommerce-cart-form" action="<?php echo esc_url( wc_get_cart_url() ); ?>" method="post">     <?php do_action( 'woocommerce_before_cart_table' ); ?>      <table class="shop_table shop_table_responsive cart woocommerce-cart-form__contents" cellspacing="0">         <thead>             <tr>                 <th class="product-remove">&nbsp;</th>                 <th class="product-thumbnail">&nbsp;</th>                 <th class="product-name"><?php esc_html_e( 'Product', 'woocommerce' ); ?></th>                 <th class="product-price"><?php esc_html_e( 'Price', 'woocommerce' ); ?></th>                 <th class="product-quantity"><?php esc_html_e( 'Quantity', 'woocommerce' ); ?></th>                 <th class="product-subtotal"><?php esc_html_e( 'Subtotal', 'woocommerce' ); ?></th>             </tr>         </thead>         <tbody>             <?php do_action( 'woocommerce_before_cart_contents' ); ?>              <?php             foreach ( WC()->cart->get_cart() as $  cart_item_key => $  cart_item ) {                 $  _product   = apply_filters( 'woocommerce_cart_item_product', $  cart_item['data'], $  cart_item, $  cart_item_key );                 $  product_id = apply_filters( 'woocommerce_cart_item_product_id', $  cart_item['product_id'], $  cart_item, $  cart_item_key );                  if ( $  _product && $  _product->exists() && $  cart_item['quantity'] > 0 && apply_filters( 'woocommerce_cart_item_visible', true, $  cart_item, $  cart_item_key ) ) {                     $  product_permalink = apply_filters( 'woocommerce_cart_item_permalink', $  _product->is_visible() ? $  _product->get_permalink( $  cart_item ) : '', $  cart_item, $  cart_item_key );                     ?>                     <tr class="woocommerce-cart-form__cart-item <?php echo esc_attr( apply_filters( 'woocommerce_cart_item_class', 'cart_item', $  cart_item, $  cart_item_key ) ); ?>">                          <td class="product-remove">                             <?php                                 echo apply_filters( // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped                                     'woocommerce_cart_item_remove_link',                                     sprintf(                                         '<a href="%s" class="remove" aria-label="%s" data-product_id="%s" data-product_sku="%s">&times;</a>',                                         esc_url( wc_get_cart_remove_url( $  cart_item_key ) ),                                         esc_html__( 'Remove this item', 'woocommerce' ),                                         esc_attr( $  product_id ),                                         esc_attr( $  _product->get_sku() )                                     ),                                     $  cart_item_key                                 );                             ?>                         </td>                          <td class="product-thumbnail">                         <?php                         $  thumbnail = apply_filters( 'woocommerce_cart_item_thumbnail', $  _product->get_image(), $  cart_item, $  cart_item_key );                          if ( ! $  product_permalink ) {                             echo $  thumbnail; // PHPCS: XSS ok.                         } else {                             printf( '<a href="%s">%s</a>', esc_url( $  product_permalink ), $  thumbnail ); // PHPCS: XSS ok.                         }                         ?>                         </td>                          <td class="product-name" data-title="<?php esc_attr_e( 'Product', 'woocommerce' ); ?>">                         <?php                         if ( ! $  product_permalink ) {                             echo wp_kses_post( apply_filters( 'woocommerce_cart_item_name', $  _product->get_name(), $  cart_item, $  cart_item_key ) . '&nbsp;' );                         } else {                             echo wp_kses_post( apply_filters( 'woocommerce_cart_item_name', sprintf( '<a href="%s">%s</a>', esc_url( $  product_permalink ), $  _product->get_name() ), $  cart_item, $  cart_item_key ) );                         }                          do_action( 'woocommerce_after_cart_item_name', $  cart_item, $  cart_item_key );                          // Meta data.                         echo wc_get_formatted_cart_item_data( $  cart_item ); // PHPCS: XSS ok.                          // Backorder notification.                         if ( $  _product->backorders_require_notification() && $  _product->is_on_backorder( $  cart_item['quantity'] ) ) {                             echo wp_kses_post( apply_filters( 'woocommerce_cart_item_backorder_notification', '<p class="backorder_notification">' . esc_html__( 'Available on backorder', 'woocommerce' ) . '</p>', $  product_id ) );                         }                         ?>                         </td>                          <td class="product-price" data-title="<?php esc_attr_e( 'Price', 'woocommerce' ); ?>">                             <?php                                 echo apply_filters( 'woocommerce_cart_item_price', WC()->cart->get_product_price( $  _product ), $  cart_item, $  cart_item_key ); // PHPCS: XSS ok.                             ?>                         </td>                          <td class="product-quantity" data-title="<?php esc_attr_e( 'Quantity', 'woocommerce' ); ?>">                         <?php                         if ( $  _product->is_sold_individually() ) {                             $  product_quantity = sprintf( '1 <input type="hidden" name="cart[%s][qty]" value="1" />', $  cart_item_key );                         } else {                             $  product_quantity = woocommerce_quantity_input(                                 array(                                     'input_name'   => "cart[{$  cart_item_key}][qty]",                                     'input_value'  => $  cart_item['quantity'],                                     'max_value'    => $  _product->get_max_purchase_quantity(),                                     'min_value'    => '0',                                     'product_name' => $  _product->get_name(),                                 ),                                 $  _product,                                 false                             );                         }                          echo apply_filters( 'woocommerce_cart_item_quantity', $  product_quantity, $  cart_item_key, $  cart_item ); // PHPCS: XSS ok.                         ?>                         </td>                          <td class="product-subtotal" data-title="<?php esc_attr_e( 'Subtotal', 'woocommerce' ); ?>">                             <?php                                 echo apply_filters( 'woocommerce_cart_item_subtotal', WC()->cart->get_product_subtotal( $  _product, $  cart_item['quantity'] ), $  cart_item, $  cart_item_key ); // PHPCS: XSS ok.                             ?>                         </td>                     </tr>                     <?php                 }             }             ?>              <?php do_action( 'woocommerce_cart_contents' ); ?>              <tr>                 <td colspan="6" class="actions">                      <?php if ( wc_coupons_enabled() ) { ?>                         <div class="coupon">                             <label for="coupon_code"><?php esc_html_e( 'Coupon:', 'woocommerce' ); ?></label> <input type="text" name="coupon_code" class="input-text" id="coupon_code" value="" placeholder="<?php esc_attr_e( 'Coupon code', 'woocommerce' ); ?>" /> <button type="submit" class="button" name="apply_coupon" value="<?php esc_attr_e( 'Apply coupon', 'woocommerce' ); ?>"><?php esc_attr_e( 'Apply coupon', 'woocommerce' ); ?></button>                             <?php do_action( 'woocommerce_cart_coupon' ); ?>                         </div>                     <?php } ?>                      <button type="submit" class="button" name="update_cart" value="<?php esc_attr_e( 'Update cart', 'woocommerce' ); ?>"><?php esc_html_e( 'Update cart', 'woocommerce' ); ?></button>                      <?php do_action( 'woocommerce_cart_actions' ); ?>                      <?php wp_nonce_field( 'woocommerce-cart', 'woocommerce-cart-nonce' ); ?>                 </td>             </tr>              <?php do_action( 'woocommerce_after_cart_contents' ); ?>         </tbody>     </table>     <?php do_action( 'woocommerce_after_cart_table' ); ?> </form>  <?php do_action( 'woocommerce_before_cart_collaterals' ); ?>  <div class="cart-collaterals">     <?php         /**          * Cart collaterals hook.          *          * @hooked woocommerce_cross_sell_display          * @hooked woocommerce_cart_totals - 10          */         do_action( 'woocommerce_cart_collaterals' );     ?> </div>  <?php do_action( 'woocommerce_after_cart' ); ?> 

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Correct value for ItemAvailability in structured data vs. google shopping feed

I’ve been working on implementing a data feed for Google merchant center and after submitting it for the first time I noticed that Google’s automatic update changed some of our items’ availability from out of stock to in stock with this message:

Your product’s availability status was automatically updated to match the data on your landing page.

A help article ( explains that this is likely to occur due to a discrepancy between the data provided in the feed and structured data shown on the product page itself. It goes on to say:

Check your product data for those products (using the item ID), and make sure that each item has the same values for availability as is represented on your own site and in its structured data.

There is a problem here though since we use OnlineOnly in our structured data and this option is not valid in the merchant center feed. My best guess is that Google classifies OnlineOnly the same as in stock.

The items in question are items that we don’t keep physical stock of, but like many online retailers these items are available directly from the supplier and fulfilled for orders as they are placed. We don’t want to falsely claim that they are in stock, so originally OnlineOnly seemed like the best option for our structured data.

At this point I’m left with a few options that I can think of to resolve this:

  • Change both values to out of stock
  • Change both values to in stock
  • Allow the discrepancy stand and let Google do as they see fit

Can anyone advise what is the most correct value for availability on both the feed and our structured data in this situation?

Deleting multiple items in a shopping cart efficiently

My boss is insistent we need to build functionality to allow users to delete multiple items out of their shopping cart at once (e.g., checkboxes, with a “Select All” button/link, and “Delete” at the top and bottom of pages).

Currently we have the far more typical “Delete” option at the item/product level.

I’ve researched dozens of competitor carts and not one offers delete-multiple-items-at-once functionality. Edit: AmazonSupply does this, but at the expense of line-item delete.

I’d love to be able to push back on this and prove it’s a bad user experience – but honestly the requestor is so adamant about it it’s probably an unwinnable discussion.

Anyway does anyone have examples of good implementations of this functionality? It seems like it’s going to add a lot of clutter and visual noise and overall is an atypical implementation. Our site has some “Save for Later” functionality multi-select might be beneficial for, but overall I’m concerned about implementing it as it doesn’t seem widely done.

Anyway if anyone has good examples of multi-select delete/save in Shopping Carts — or compelling articles why that functionality shouldn’t be used for me to try to beat the requirement back with any help would be appreciated — thanks!

Is there a preset CSS class when shopping cart isn’t empty?

WooCommerce enables automatically .logged-in class when a user is logged in. This allows to create a page with different content without any PHP coding.

Is there something similar when the shopping cart is empty? I am NOT seeking any PHP solution. It should be solved only with a CSS class so I can hide/show parts of a page depending on the fact this CSS class does/does not exist.