Payment Gateway Plugin Development — a practical guide to WooCommerce payment gateway plugin with clear examples you can reuse in real projects.
WordPress Plugin Development Series (59/95). Prefer one article? Read the complete WordPress plugin development tutorial.
Short description
Extend `WC_Payment_Gateway`, implement form fields/process_payment, and verify webhooks server-side.
Gateway checklist
1. Extend WC_Payment_Gateway
2. Register via woocommerce_payment_gateways
3. process_payment + thank you page
4. Webhook signature verification
5. Order notes + status updates