[Codeigniter] Find out your version of Codeigniter

Go to directory of your Codeigniter project and look for the file at :

/system/core/CodeIgniter.php

For example:

 And then search for define with name "CI_VERSION" :

For this case, CodeIgniter version 2.1.4 is found.

Reference

http://stackoverflow.com/questions/2196799/which-version-of-codeigniter-am-i-currently-using