The framework is released under the MIT license



The database drivers have had extensive refactoring



PDO is fully functional with subdrivers



There is a new Session library



There is a new Encryption library



The unit testing has been beefed up, and code coverage improved



PHP 5.4 or newer is recommended, but CI will still work on PHP 5.2.4





CodeIgniter 3.0.0 has been released, and is now available for download Changes compared to CodeIgniter 2:Here is a detailed list of the changes in CodeIgniter.Here are some instructions for upgrading to CodeIgniter 3 from CodeIgniter 2.Many, many thanks to @narf for shepherding version 3, and to the CodeIgniter community for their support and contributions!Edit: Fixed the links