Updated: 22 January 2025
The framework
CodeIgniter 3, the legacy version of the framework.
https://github.com/bcit-ci/CodeIgniter
https://codeigniter.com/userguide3/
CodeIgniter 4, the latest version of the framework.
https://github.com/codeigniter4/CodeIgniter4
Upgrading notes
To find your current Codeigniter version, look for this constant
define('CI_VERSION', '3.1.7');The highest version of 3 is 3.1.13
The highest version of 2 is 2.2.6
This is a fork of CodeIgniter 3, with the goal of keeping it up to date with PHP 8.4 and beyond https://github.com/pocketarc/codeigniter