HJS Product Variants — OpenCart 4

Give every combination of a product's options its own SKU, price, stock and weight. Stock is tracked per combination, so Large Blue can sell out while Small Blue stays on sale — and the product page shows the right price and availability as the customer chooses.

Key features

• A separate stock quantity for every combination of a product's Select and Radio options
• A separate SKU for every combination
• An optional price per combination, replacing the calculated price — the cart charges the override
• An optional weight per combination, replacing the calculated weight — shipping cost follows the override
• A one-click generator that builds every combination from the options already on the product
• Regenerating adds only what is missing — existing rows keep their SKU and stock
• Enable or disable a single combination without deleting it
• Show the variant's SKU on the product page
• Unavailable option values are greyed out, or hidden entirely with "Hide unavailable combinations"
• Works alongside a free-text option such as engraving on the same product
• Add to cart is refused for an out-of-stock combination, and stock is re-checked in the cart
• Two combinations of the same product can be in the basket at once, tracked and charged independently
• Stock moves on order status using the statuses OpenCart already uses, and is restored on cancel
• Installs through Extensions > Installer as an OCMOD package — no core files are overwritten

Compatibility

Tested on OpenCart 4.1.0.4, PHP 8.4. MySQL or MariaDB with InnoDB. Built against the default OpenCart 4 theme.

Tags: product variants, option combinations, variant stock, product sku, combination price