When we use the term “Libraries” we are normally referring to the classes that are located in the libraries directory and described in the Class Reference of this user guide

If you do not utilize CodeIgniter’s template engine, you’ll

CodeIgniter comes with an “Auto-load” feature that permits libraries, helpers, and models to be initialized automatically every time the system runs. If you need certain resources

Helpers, as the name suggests, help you with tasks. Each helper file is simply a collection of functions in a particular category. There are URL Helpers, that

In order to help out, CodeIgniter uses a series of function, method, class and variable names in its operation. Because of this, some names cannot be used by a developer. Following

As well as calling an applications Controllers via the URL in a browser

Drivers are a special type of Library that has a parent class and any number of potential child classes. Child classes have access to the parent class, but not their siblings

By default it is assumed that you only intend to use CodeIgniter to manage one application, which you will build in your application/ directory. It is possible, however

Typically there is a one-to-one relationship between a URL string and its corresponding controller class/method. The segments in a URI normally follow this pattern:

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