Codeigniter Directory Structure

Now that you have CodeIgniter downloaded and unzipped, take a minute to look at the file structure. Below illustrates the initial folder structure you ’ ll see.

 

You can see three folders and two files in the codeigniter folder. The three folders are application, system and Codeigniter user guide and the files are index.php and license.txt.Below is the detailed description about the directories.

The application Folder— The application folder contains the application you ’ re building. Basically, this

folder contains your models, views, controllers, and other code (like helpers and class
extensions). In other words, this folder is where you will work for the project development.

cache — The cache folder contains all cached pages for your application. In Chapter 9 , you learn

more about caching and how to turn your super - speedy development application into a
blazingly fast live application.

Config— The Know more about config folderfolder is the area where you set the configuration for your application.

Controllers— In this folder you will place your class files developed for your application

core— In this folder you will place your base class files of your application

errors— In this folder you will place your application specific error logs

helpers— In this folder you will place the include files use full for your application

hooks— In this folder you will place the support files use full for your application

language— In this folder you will place language  macros/ define constants.

libraries— In this folder you will place your own developed libraries useful for your application

logs — The logs folder is the folder CodeIgniter uses to write error and other logs to.

models— In this folder you will place your data base fetching logic in
thirdparty— In this folder you can place any plugins used for your application
views— Most of your work will be in this folder, you will place your html template files. 

The system/ Folder

The system/ folder is where all the action happens. This folder contains all the CodeIgniter code of
consequence, organized into various folders:

core — The core folder is where CodeIgniter ’ s core classes live. You have almost no
reason to go in here. All of your work will occur in the application folder. Even if your intent is
to extend the CodeIgniter core, you would do it with hooks, and hooks live in the application
folder.
database — The database folder contains core database drivers and other database utilities. Again,
there ’ s no good reason for you to be in this folder.
fonts — The fonts folder contains font - related information and utilities. Again, there ’ s no reason
to spend any time here.
helpers — The helpers folder contains standard CodeIgniter helpers (such as date, cookie, and
URL helpers). You ’ ll make frequent use of helpers in your CodeIgniter career and can even
extend helpers thanks to improvements introduced in CodeIgniter version 1.6.
language — The language folder contains language files. You can ignore it for now.
libraries — The libraries folder contains standard CodeIgniter libraries (to help you with e - mail,
calendars, file uploads, and more). You can create your own libraries or extend (and even
replace) standard ones, but those will be saved in the application/libraries directory to keep
them separate from the standard CodeIgniter libraries saved in this particular folder.

For more info visit codeigniter site at www.codeigniter.com