2월 1일 출시 되었네요.

• PHP 8 is now fully and officially supported!
• 4.0.5 is the final version that will support PHP 7.2 - starting with 4.1.x the new requirement will be 7.3, 7.4, or 8.x
• Generators are now available to help create components from the command line, User Guide
• Updates to the class handling system now allow overriding of core services
• The beloved "Model" has now been split into a Base and a "SQL-Model" to make space for future NoSQL support
• Lots of updates to the development toolkit make it easier for you to analyze and test your projects, and use CI/CD pipelines
• Quite a few of the Config classes have been split out to make it cleaner and clearer where to go to alter service behavior

다운로드: http://codeigniter.com/download