WooCommerce Checkout Access Codes

A lightweight WooCommerce plugin that adds a single Access Code field to checkout when needed, and prevents customers from purchasing certain products unless a valid code is provided.

Built to be generic and reusable across any store/industry.

What it does

• Adds an Access Code field to checkout only if the cart contains restricted products.
• Lets store owners assign one or multiple allowed codes per product (one per line).
• Blocks checkout (order placement) unless the code matches every restricted product in the cart.
• Saves the used access code onto the order for admin visibility.

Requirements

• WordPress + WooCommerce installed and active.

Installation

1. Create a folder: wp-content/plugins/woocommerce-checkout-access-codes/
2. Add this file inside it: woocommerce-checkout-access-codes.php
3. Activate in WP Admin → Plugins.

Setup (Store Owner)

1. Edit any product in WooCommerce.
2. Go to Product Data → General.
3. Find Checkout Access Codes.
4. Enter one code per line. (Leave blank for unrestricted products.)
5. Update the product.

How matching works

• Codes are normalized before comparison:
  • trimmed
  • multiple spaces collapsed
  • converted to uppercase

Admin: where to see the code used

Open the order in WP Admin and you’ll see Access Code Used in the order details.

Notes / limitations

• This plugin blocks purchase at checkout (not at add-to-cart).
• A single code must be valid for all restricted products in the cart.

License

MIT (recommended) — add a LICENSE file if you want open-source friendly defaults.