WooCommerce Snippet Generator

The generator works from a fixed list of WooCommerce hooks checked against the official code reference, and refuses to invent new ones. Every snippet follows the same rules:

• HPOS-safe. Orders are read and written through wc_get_order() and the order object (get_meta, update_meta_data, save), never get_post_meta or direct database queries.
• Checkout-aware. Each answer says whether it works with the classic checkout, the Checkout block, or both.
• Prefixed functions so they don't clash with your theme or plugins.
• A rollback plan for when something goes wrong.

Many older snippets use hooks that only run in the classic (shortcode) checkout. The Checkout block, now the default on new stores, uses the Store API instead. Some common examples:

Not sure which you have? Open the checkout page in the editor. If it shows the [woocommerce_checkout] shortcode or a Classic Checkout block, you're on classic.

1. 01

   Code Snippets plugin (recommended)

   WooCommerce's own docs recommend it. Install Code Snippets, go to Snippets → Add New, paste, and save and activate. It can deactivate snippets that cause fatal errors.

2. 02

   Child theme functions.php

   Only in a child theme, since theme updates overwrite the parent's file. Back it up and edit over SFTP, not the built-in editor.

3. 03

   Roll back

   Deactivate the snippet, or remove the code from functions.php. If the site is down, add &snippets-safe-mode=1 to an admin URL, or use the recovery mode link WordPress emails to the admin.

Test every snippet on a staging site or with a test order first. The generator follows documented hooks but can't see your theme or plugins, so nothing is guaranteed.