CodeIgniter is a powerful PHP framework with a very small footprint, built for PHP coders who need a simple and elegant toolkit to create full-featured web applications. If you're a developer who lives in the real world of shared hosting accounts and clients with deadlines, and if you're tired of ponderously large and thoroughly undocumented frameworks

* You want a framework with a small footprint.
* You need exceptional performance.
* You need broad compatibility with standard hosting accounts that run a variety of PHP versions and configurations.
* You want a framework that requires nearly zero configuration.
* You want a framework that does not require you to use the command line.
* You want a framework that does not require you to adhere to restrictive coding rules.

* You are not interested in large-scale monolithic libraries like PEAR.
* You do not want to be forced to learn a templating language (although a template parser is optionally available if you desire one).
* You eschew complexity, favoring simple solutions.
* You need clear, thorough documentation.