# CodeIgniter 2 Open Source PHP Framework (originally from EllisLab) For more info, please refer to the user-guide at http://www.codeigniter.com/userguide2/ (also available within the download package for offline use) **WARNING:** *CodeIgniter 2.x is no longer under development and only receives security patches until October 31st, 2015. Please update your installation to the latest CodeIgniter 3.x version available (upgrade instructions [here](http://www.codeigniter.com/userguide3/installation/upgrade_300.html)).*