Is it possible to email all people who ordered a product when this product becomes out of stock?
Example: Product A has 15 in quantity. When it reaches 0 to sent emails to all people that ordered this product.
I've found woocommerce_email_recipient_no_stock hook, however I'm not sure how or if I can use it. Any example will be appreciated.
This has to be configured in woocommerce admin, go to WooCommerce > Notifications and click on the “Add notification” button:Enable notifications for Purchases,Low stock,Out of stock,Backorders etc.