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How to Create a URL That Applies a Discount & Adds Products to WooCommerce Cart?

By default, WooCommerce enables you to generate URL coupons in WooCommece manually. One good way is to bypass manually entering coupon codes! This could also reduce the number of customers leaving your site looking for discount coupon codes.

You can create unique coupon links or URLs for each coupon and offer them to the customers instead of raw coupons. Coupon links are an alternative to our conventional coupon code approach, enabling applying coupons using a URL. In addition to discount coupons, you can also attach products with coupon URLs.

This post will guide you on how to create a URL that applies a discount and adds products to the WooCommerce cart.

Where to Add Custom Code in WooCommerce?

It is advisable to add the code snippets to the functions.php file of your child theme. Access the file directly from Appearance->Theme File Editor->Locating the child theme’s functions.php from the right sidebar. You can also access it from your theme’s directory file. Insert the following code snippet in functions.php. The alternative & easy option is to install & activate the Code Snippets plugin. You can then add the code as a new snippet via the plugin.

Preliminary Steps

Here’s a general guide on how you can create a coupon and construct such a URL:-

Creating Coupon:

Before applying the code snippet, you need to first create the coupon code in the backend. Follow the steps below:-

  1. Navigate to the WooCommerce admin.
  2. Go to “Marketing” > “Coupons.”
  3. Click “Add Coupon.”

For E.g. – I have set up a coupon code called “cybermonday”.

How to Create a URL That Applies a Discount & Adds Products to WooCommerce Cart? - Tyche Softwares

Applying a Discount Code & Adding Products:

To apply a discount code and add products, use the following URL parameters:

  • apply_coupon: The coupon code you want to apply.
  • add-to-cart: Comma-separated list of product IDs.
  • quantity: The quantity of each product.
http://127.0.0.1/wordpress/?page_id=7&apply_coupon=your_coupon_code&add_to_cart=product_id&quantity=1,2

Solution: Create a URL That Applies a Discount and Adds Products to the WooCommerce Cart

An online store is offering a deal where customers can get a discount on their purchase by entering a coupon code along with its product ID and quantity in the URL. They want to simplify the process by automatically applying the coupon code to the cart when customers visit the site.

The below snippets provide the functionality for the store to automatically apply the coupon code & product to the cart.

function ts_apply_coupon_and_add_to_cart() {
    // Check if WooCommerce is active and sessions are available.
    if ( class_exists( 'WooCommerce' ) && WC()->session ) {
        
        // Check if coupon code is provided in the URL.
        if ( isset( $_GET['apply_coupon'] ) && ! empty( $_GET['apply_coupon'] ) ) {
            $coupon_code = sanitize_text_field( $_GET['apply_coupon'] );

            // Set a session cookie to remember the coupon if they continue shopping.
            WC()->session->set_customer_session_cookie( true );

            // Apply the coupon to the cart if necessary.
            if ( ! WC()->cart->has_discount( $coupon_code ) ) {
                WC()->cart->add_discount( $coupon_code );
            }
        }

        // Check if products are specified in the URL to add to the cart.
        if ( isset( $_GET['add_to_cart'] ) && ! empty( $_GET['add_to_cart'] ) ) {
            $product_ids = explode( ',', sanitize_text_field( $_GET['add_to_cart'] ) );
            $quantity = isset( $_GET['quantity'] ) ? explode( ',', sanitize_text_field( $_GET['quantity'] ) ) : array();

            // Loop through product IDs and add them to the cart.
            foreach ( $product_ids as $key => $product_id ) {
                $quantity_to_add = isset( $quantity[ $key ] ) ? $quantity[ $key ] : 1;
                WC()->cart->add_to_cart( $product_id, $quantity_to_add );
            }
        }
    }
}

add_action( 'wp_loaded', 'ts_apply_coupon_and_add_to_cart', 30 );

Output

When the coupon code “cybermonday”, product ID (37), and quantity are entered in the URL, the system automatically applies the coupon amount to the cart subtotal and adds the product to the cart table on the WooCommerce cart page.

How to Create a URL That Applies a Discount & Adds Products to WooCommerce Cart? - Tyche Softwares
How to Create a URL That Applies a Discount & Adds Products to WooCommerce Cart? - Tyche Softwares

Schedule Local Deliveries & Pickups in WooCommerce

Order Delivery Date Pro for WooCommerce lets you create different delivery schedules, set charges for Weekdays & special dates, manage local pickup dates, and notify customers once the order is ready

Since the customers pick a delivery date and time set by you, order fulfillment and customer satisfaction becomes a breeze.

Code Explanation

Function: ts_apply_coupon_and_add_to_cart()

This function is designed to be hooked into the WordPress action wp_loaded. It checks if WooCommerce is active and sessions are available. If so, it performs two main tasks: applying a coupon code and adding products to the cart based on the parameters provided in the URL.

Check for WooCommerce and Sessions

This part checks if the WooCommerce class exists, indicating that the WooCommerce plugin is active, and if the session is available.

Applying a Coupon Code

If a coupon code is provided in the URL (using the ‘apply_coupon‘ parameter), it sanitizes the input and checks if the coupon is not empty. Then, it sets a customer session cookie and applies the coupon to the cart if it’s not already applied.

Adding Products to the Cart

If products are specified in the URL (using the ‘add_to_cart’ parameter), it sanitizes the input and checks if the product list is not empty. It then processes product IDs and quantities (if provided) and adds them to the cart.

Applying Quantity to Products

If quantities are provided in the URL (using the ‘quantity’ parameter), it sanitizes the input and converts it into an array. This array is then used to determine the quantity to add for each product.

Looping Through Product IDs and Adding to Cart

This loop iterates through the product IDs and adds them to the cart using the add_to_cart method. If a quantity is specified for a product, it uses that quantity; otherwise, it defaults to 1.

Hooking the Function

This line hooks the ts_apply_coupon_and_add_to_cart function to the wp_loaded action with a priority of 30. The priority determines the order in which multiple functions hooked to the same action are executed. In this case, it ensures that the function runs relatively early during the WordPress loading process.

Conclusion

The above snippets handle two scenarios: applying a coupon code specified in the URL and adding products to the cart based on product IDs and quantities provided in the URL. Alternatively, you can also auto apply the coupon programatically in WooCommerce without modifying the URL.

Browse more in: Code Snippets, WooCommerce How Tos, WooCommerce Tutorials

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