Apply WooCommerce Coupon From URL

This custom WordPress snippet enhances the shopping experience on WooCommerce-based websites by allowing users to add a product to their cart and apply a discount coupon through a URL without the need for third-party plugins.

How the Snippet Works:

1. Action Hook: It hooks into WordPress’s init action, which means it gets executed early when WordPress initializes.
2. Checking Parameters: It checks if the required URL parameters are present. If either parameter is missing, the function exits early.
3. Product Addition: If the product ID is valid and the product is not already in the cart, it adds the product to the cart.
4. Coupon Application: If a coupon code is provided and it hasn’t already been applied, the snippet applies the coupon to the cart.
5. Redirection: After adding the product and applying the coupon, the user is redirected to the cart page to view their updated cart.

Usage Example:

To use this functionality, a URL needs to be constructed with specific parameters for the product ID and the coupon code. Here is how you can create such a URL:

• Base URL: http://yourwebsite.com/
• Product ID Parameter: custom-product-to-cart (you can rename this)
• Coupon Code Parameter: custom-coupon (you can rename this)

 

Example URL:
http://yourwebsite.com/?custom-product-to-cart=123&custom-coupon=SAVE20

In this example, 123 is the product ID and SAVE20 is the coupon code. When a user visits this URL, the product with the ID 123 will be added to their cart, and the coupon SAVE20 will be applied if applicable.

Customization:

You can easily customize the names of the parameters (custom-product-to-cart and custom-coupon) in the URL by editing their instances in the snippet. Just ensure that you replace them consistently throughout the code to match your custom parameter names.

This snippet provides a straightforward way to streamline promotions and improve user experience by simplifying the process of adding products and applying coupons with just a URL click.