Development Tutorials
OpenCart development tutorials, code examples, and technical guides.
Development Tutorials
How to Add a Custom Payment Method in OpenCart
A step-by-step guide to building a custom OpenCart payment method: controller, model, language, template and a secure callback.
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June 27, 2026
Development Tutorials
Build Your First OpenCart 4 Module: A Step-by-Step Guide
A beginner's guide to building an OpenCart 4 module: the MVC-L structure, OCMOD packaging, and installation.
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February 7, 2026
Development Tutorials
Customizing OpenCart 4 Twig Templates the Right Way
Where Twig templates live, how the theme system works, and how to keep changes upgrade-safe.
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January 31, 2026
Development Tutorials
OpenCart 4.0 New Features and Improvements 2025
Discover the groundbreaking features of OpenCart 4.0: enhanced performance, modern design, and advanced security capabilities.
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July 23, 2025