Open Source PHP Framework (originally from EllisLab)
PHP HTML Python JavaScript Makefile CSS Shell
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application [ci skip] Drop application/cache/.htaccess; close #5169 Jul 3, 2017
system [ci skip] Prepare 3.1.6 release Sep 25, 2017
tests #5164 fix for stock libraries Jun 28, 2017
.travis.yml Fix Travis-CI failures Sep 4, 2017
composer.json [ci skip] Update links to https Jan 11, 2016
license.txt Update copyright data to 2017 Jan 3, 2017
phpdoc.dist.xml Fix phpdoc config file May 2, 2012
readme.rst Update readme.rst Jul 27, 2017


What is CodeIgniter

CodeIgniter is an Application Development Framework - a toolkit - for people who build web sites using PHP. Its goal is to enable you to develop projects much faster than you could if you were writing code from scratch, by providing a rich set of libraries for commonly needed tasks, as well as a simple interface and logical structure to access these libraries. CodeIgniter lets you creatively focus on your project by minimizing the amount of code needed for a given task.

Release Information

This repo contains in-development code for future releases. To download the latest stable release please visit the CodeIgniter Downloads page.

Changelog and New Features

You can find a list of all changes for each release in the user guide change log.

Server Requirements

PHP version 5.6 or newer is recommended.

It should work on 5.3.7 as well, but we strongly advise you NOT to run such old versions of PHP, because of potential security and performance issues, as well as missing features.


Please see the installation section of the CodeIgniter User Guide.


Please see the license agreement.


Report security issues to our Security Panel or via our page on HackerOne, thank you.


The CodeIgniter team would like to thank EllisLab, all the contributors to the CodeIgniter project and you, the CodeIgniter user.