PHP Plug-Ins
- By Ann MorganPublished On: May 27, 2026Categories: PHP Plug-Ins0 Comments on How to Add an “Add Free Product” (or not free product!) Checkbox to a Specific WooCommerce Product VariationTags: Claude AI, PHP Tools, WooCommerce
An example WordPress plugin you can copy that adds an optional add-on product to a specific WooCommerce variation — not every variation. Includes the full PHP code and installation instructions.