CodeIgniter

- A Fully Baked PHP Framework

Pradip Kharbuja (551212591)

M.Sc.(IT) 4th Sem

College for Professional Studies

25th November, 2013

Overview

Welcome to CodeIgniter (CI)

CodeIgniter is Right for You if…

CodeIgniter at a Glance

Design and Architectural Goals

CodeIgniter Features

Model-View-Controller

Application Flow Chart

Controllers

Views

Models

Reserved Names

Welcome to CodeIgniter (CI)

CodeIgniter is an Application Development Framework for people who

build web sites using PHP.

CodeIgniter is a powerful PHP framework with a very small footprint.

It is powering the next generation of web apps.

Its goal is to enable you to develop projects much faster than from

scratch.

CodeIgniter lets you creatively focus on your project by minimizing the

amount of code needed for a given task.

CodeIgniter is Right for You if…

You want a framework with a small footprint.

You need clear, thorough documentation.

You prefer nearly zero configuration.

You don't want to adhere to restrictive coding rules.

You don't want to learn another template language.

You prefer simple solutions to complexity.

CodeIgniter at a Glance

CodeIgniter is Free

CodeIgniter is Light Weight & Fast

CodeIgniter Uses M-V-C

CodeIgniter Generates Clean URLs

CodeIgniter is Extensible

CodeIgniter is Thoroughly Documented

CodeIgniter has a Friendly Community of Users

Design and Architectural Goals

maximum performance

capability

flexibility in the smallest, lightest possible package.

CodeIgniter Features

Model-View-Controller Based System

Extremely Light Weight

Full Featured database classes with

support for several platforms.

Form and Data Validation

Security and XSS Filtering

Session Management

Email Sending Class

Image Manipulation Library

File Uploading Class

Pagination

Data Encryption

Error Logging

Calendar Class

Template Engine Class

Unit Testing Class

Search-engine Friendly URLs

Flexible URI Routing

Support for Hooks and Class Extensions

Large library of "helper" functions

Model-View-Controller

Application Flow Chart

Controllers

A Controller is simply a class file that is named in a way that can be

associated with a URI.

e.g. example.com/index.php/blog/

Views

A view is simply a web page, or a page fragment, like a header, footer,

sidebar, etc.

Views are never called directly, they must be loaded by a controller.

e.g. $this->load->view('view_name');

CodeIgniter can intelligently handle multiple calls to load multiple views.

CodeIgniter can also return views as data.

e.g. $string = $this->load->view('myfile', '', true);

Models

Models are PHP classes that are designed to work with information in

your database.

A model class contains functions to insert, update, and retrieve data.

Reserved Names

Controller names

1. Controller

2. CI_Base

3. _ci_initialize

4. Default

5. index

Functions

1. is_really_writable()

2. load_class()

3. get_config()

4. show_error()

5. show_404()

6. log_message()

7. get_instance()

Variables

1. $config

2. $mimes

3. $lang

Constants

1. ENVIRONMENT

2. CI_VERSION

References

• http://ellislab.com/codeigniter

• http://stackoverflow.com/questions/1618065/what-is-meaning-of-small-

footprint-in-terms-of-programming

• http://ellislab.com/forums/

CodeIgniter

Any Questions ?

Thank you!

http://ellislab.com/codeigniter/user-guide/