Every time CodeIgniter runs there are several base classes that are initialized automatically as part of the core framework. It is possible, however, to swap any of the core

PHP version 5.6 or newer is recommended. It should

CodeIgniter’s Hooks feature provides a means to tap into and modify the inner workings of the framework without hacking the core files. When CodeIgniter runs it follows a specific

This page describes some “best practices” regarding web security, and details CodeIgniter’s internal security features.