OpenCart 4.0.2.3 is the stable release of OpenCart, while OpenCart 3.0.4.0 is a version of the 3.0 branch that includes bug fixes and security patches:
To update OpenCart 3 to 4, you can:
| OpenCart 4.0.2.3 | OpenCart 3.0.4.0 | |
|---|---|---|
| Release date | September 15, 2023 | July 24, 2024 |
| Features | More user-friendly interface, faster and more efficient than OpenCart 3.0 | Bug fixes and security patches |
| Compatibility | Compatible with PHP >= 7.4 | Compatible with most modules and extensions that work with OpenCart 3.0.3.9 |
To update OpenCart 3 to 4, you can:
- Back up your site and database
- Download OpenCart 4
- Disable third-party extensions and custom themes
- Upload new files via FTP
- Run the upgrade script
- Test the site, enable extensions, and update themes if necessary