Opencart 3.

OpenCart 3 (3.0.x) documentation and tutorials: installation, admin settings, free OpenCart 3 modules and themes, Twig templates, OCMOD, module and theme development, SEO URLs, captcha, payment and shipping setup, and how to upgrade from OpenCart 3 to OpenCart 4. Step-by-step help for store owners and developers still running OpenCart 3.

Opencart 3

198 ARTICLES

Opencart · 8 min read

OpenCart Security in 2026: Admin 2FA, Known Vulnerabilities, Malware Signs and a Hacked Store Recovery Checklist

Turn on OpenCart 4's built-in two-factor login, lock down the admin, know the OpenCart CVEs that matter, spot card skimmers and injected code, and…OCT 26, 2026 Opencart · 7 min read

Build a Multi-Vendor Marketplace on OpenCart: What You Need, Extensions Compared, Commissions, Payouts and Tax Reporting

OpenCart has no built-in seller accounts. What a marketplace really needs, how the main OpenCart multi-vendor extensions compare, how to pay sellers with Stripe…OCT 26, 2026 Opencart · 7 min read

Core Web Vitals for OpenCart Themes: Fix LCP, INP and CLS Step by Step

Why OpenCart stores fail Core Web Vitals and how to fix each metric in the theme: missing image dimensions (CLS), slow hero and product…OCT 26, 2026 Opencart · 8 min read

OpenCart on PHP 8.2, 8.3, 8.4 and 8.5: Fix Deprecated Warnings and Upgrade PHP Safely

Which PHP version each OpenCart release supports, what breaks in PHP 8.1 to 8.5, how to find the problem lines with php -l, PHPCompatibility…OCT 26, 2026 Opencart 3 · 7 min read

Upgrading OpenCart 3 to 4.1 in 2026: Why the Upgrade Script Isn’t the Answer, and a Migration Plan That Works

OpenCart 4.1.0.4's upgrade script only supports 4.1.x. How to move an OpenCart 3 store to 4.1 anyway: a fresh install plus data migration, keeping…OCT 26, 2026 eCommerce · 14 min read

How to Implement Facebook (Meta) Pixel Tracking in OpenCart 4: Complete eCommerce Conversion Tracking Guide

If you are running an OpenCart 4 store and advertising products through Facebook or Instagram, implementing Meta Pixel tracking is an important step toward…SEP 29, 2026 eCommerce · 6 min read

Inventory Management Mistakes That Sink Small Ecommerce Businesses

Most small ecommerce businesses don’t fail because of a bad product or a weak marketing budget. They fail quietly, in the background, because of…AUG 29, 2026 OpenCart Tips and Tricks · 7 min read

Accessibility (ADA/WCAG) for Ecommerce Stores: Why It’s Not Optional

For ecommerce stores, accessibility is now a non‑optional requirement driven by accelerating ADA litigation and the reality that inaccessible UX directly erodes conversions and…AUG 19, 2026 OpenCart Tips and Tricks · 9 min read

CLAUDE.md for the Opencart developer

As AI coding assistants become part of everyday development, one challenge quickly becomes obvious: they only know what you tell them. Without project-specific guidance,…AUG 7, 2026 Opencart 4 tutorial · 6 min read

OpenCart MCP Server: Bring AI-Powered Store Management to OpenCart

Artificial Intelligence is rapidly changing how developers build software and how merchants manage online stores. Instead of switching between multiple dashboards, writing SQL queries,…JUL 26, 2026 Salesforce · 6 min read

How AI Crawlers Read Your Website

Search is changing. Instead of typing a query into Google and clicking through a list of links, millions of users now ask ChatGPT, Claude,…JUL 21, 2026 OpenCart Tips and Tricks · 5 min read

20 AI Prompts to Improve Your eCommerce Website in 2026

Artificial intelligence is quickly becoming one of the most valuable tools available to eCommerce store owners. Whether you run an online store on OpenCart,…JUL 16, 2026 OpenCart Guide · 5 min read

How AI Agents Are Changing Product Discovery: From Search Results to Chat-Based Shopping Research

For more than two decades, ecommerce discovery followed a predictable pattern: That model is changing rapidly. AI agents and conversational assistants are transforming how…JUL 8, 2026 Opencart 4 tutorial · 9 min read

How to Secure an OpenCart Store with Content Security Policy (CSP)

Modern OpenCart stores run a mix of core code, themes, extensions, analytics, ads, and third‑party scripts. That complexity creates opportunities for cross‑site scripting (XSS),…JUL 7, 2026 Salesforce · 8 min read

First‑Touch vs Last‑Touch UTMs with Cookies: Track with two fields for Better Attribution

In our previous article, we showed how to capture UTMs, store them in cookies, and keep attribution working across multiple pages and sub‑domains. That…JUL 7, 2026