Origin: PHP MVC 網站開發模組化利器 CodeIgniter + Sparks
CodeIgniter 是 PHP 的 MVC 網站開發框架，它提供一個基礎的架構，讓網站剛起步就有良好的各項機制，包括 URL Routing（支援友善網址）、Models-Views-Controllers、Class Libraries（可自訂擴充的函式庫）、Drivers（Caching、JavaScript、Database抽象層）、Helpers、Hook 及 Error Handler 等。
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.
CodeIgniter 的 Helper 已提供不少常用函式，例如：CAPTCHA、Mail、XML、Form...等。
