Course Content
Introduction to CodeIgniter
CodeIgniter is a powerful PHP framework built for developers who need a simple and elegant toolkit to create full-featured web applications.
MVC (Model-View-Controller)
MVC stands for Model-View-Controller. MVC is an application design model consisting of three interconnected parts. They include the model (data), the view (user interface), and the controller (processes that handle input).
The Session class allows you to maintain a user’s "state" and track their activity while they browse your site.
URI Routing
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:
Forms and Input
Forms provide a way for users to interact with the application and submit data.
Composer is dependency manager in PHP. it allows you to declare the libraries your project depends on and it will manage (install/update) them for you.
You can enable CSRF protection by modifying your application/config/config.php file
Working with Database
Like any other framework, we need to interact with the database very often and CodeIgniter makes this job easy for us. It provides a rich set of functionalities to interact with the database.
DataTables is a table enhancing plug-in for the jQuery Javascript library that helps in adding sorting, paging, and filtering abilities to plain HTML tables with minimal effort. The main goal is to enhance the accessibility of data in normal HTML tables.
PhpSpreadsheet is a PHP library for reading and writing spreadsheet files. Importing Excel and CSV into MySQL help to save the user time and avoid repetitive work.
Payment Gateway
Razorpay and PayTM Payment Gateway
WhatsApp Chatbot and Telegram Chatbot
CodeIgniter 3
About Lesson


CodeIgniter is a powerful PHP framework built for developers who need a simple and elegant toolkit to create full-featured web applications.


Before you proceed you should have a basic understanding of the following:

  1. HTML
  2. PHP


CodeIgniter was created by EllisLab and is now a project of the British Columbia Institute of Technology.

The latest version of the CodeIgniter framework is 3.1.11.


The source code of CodeIgniter is hosted on GitHub and licensed under the terms of the MIT License.

As it is open-source software, you are allowed to copy, modify, and distribute this software.


If you know PHP well, then CodeIgniter will make your task easier. It has a rich set of libraries and helpers. A website built in CodeIgniter is secure, as it can prevent various attacks that take place through websites. By using the CodeIgniter, you will save a lot of time, if you are developing a website from scratch.



Features of CodeIgniter are listed below:

  • Model-View-Controller based framework
  • Extremely Light Weight
  • Query Builder Database Support
  • Security and XSS Filtering
  • Form and Data Validation
  • Session Management
  • Search-engine Friendly URLs
  • Localization
  • Pagination
  • Data Encryption