CodeIgniter is another popular open-source PHP web application framework that is known for its simplicity, lightweight footprint, and straightforward approach to web development. It was originally created by EllisLab, but it is now a community-driven project hosted on GitHub.

CodeIgniter is often favored for smaller projects or when developers prefer a lightweight framework that doesn’t impose too many conventions. However, it’s important to note that, as of my knowledge cutoff in September 2021, CodeIgniter development had slowed down compared to other frameworks like Laravel and Symfony. This is not to say that CodeIgniter is not a viable choice, but developers might want to consider the ecosystem and community support when choosing a framework for their projects.

To start developing with CodeIgniter, you can download the latest version from the official website (https://codeigniter.com/ ) and refer to the documentation and user guide for detailed information on its features, configuration, and best practices.