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Why CodeIgniter?
Framework with a small footprint
CodeIgniter 3 has a 2MB download, including the user guide. CodeIgniter 4 is a 1.2MB download, plus 6MB for the user guide.
Simple solutions over complexity
CodeIgniter encourages MVC, but does not force it on you.
Clear documentation
CodeIgniter consistently outperforms most of its competitors.
Exceptional performance
CodeIgniter consistently outperforms most of its competitors.
Strong Security
We take security seriously, with built-in protection against CSRF and XSS attacks. Version 4 adds context-sensitive escaping and CSP
Nearly zero configuration
Much of the CodeIgniter configuration is done by convention, for instance putting models in a "models" folder. There are still a number of configuration options available, through scripts in the "config" folder.