13 May

A Brief Introduction to Codeigniter Framework

In programming, a framework is regarded as the most useful tools—after IDEs. A framework offers a flexible and rich collection of essential classes, methods, and code snippets which are frequently utilized in a large number of projects. A framework not only assists programmer avoid the trouble of wasting time over needless and duplicated coding, but also guarantee greater protection and optimisation of a project.

Presently, you will find many open-source PHP frameworks for free, for example Laravel, Symfony 2, Phalcon, CodeIgniter etc. Just search in Google, you will get a lot of PHP frameworks. All the frameworks generally have a similar skeleton and groups of classes and functions, yet, the syntaxes and some libraries may differ from one another. However, among all these frameworks, I think the CodeIgniter is the most simple, easy to use and flexible framework.

What is CodeIgniter?

CodeIgniter is a free and open source Application Development Framework for creating web application using PHP. CodeIgniter provides a rich collection of libraries for performing common tasks and also provides an easy to use interface for accessing those libraries. The main goal of this framework is to enable web developer to build application much quicker than they could if they were writing code from scratch. CodeIgniter allows web developers to emphasis on the project by reducing the quantity of code required for a particular job. The very first edition of CodeIgniter was introduced for public by EllisLab on 28th February, 2006, and the most recent stable edition 3. 0. 0 was launched on March 31, 2015.

This framework is generally based on the well-known design pattern MVC (Model View Controller). However the only essential part is the controller classes. The models and views are not compulsory.

What is MVC?

In accordance with the user guide, MVC is a method which separates the business logic from the presentation.

The Model is a set of classes and functions which represents the core of the application. Basically, the model establishes a connection with the database and adjusts information.

The view is the info that is being shown to the end user. It might be a full page, or a part of the pages like a header or footer.

The controller represents the classes that connect the model and the view. This means the controller is generally used to communicate among classes in the model and view.

The advantages of Codeigniter over other PHP based frameworks are its speed and user guide.

Some remarkable features of Codeigniter are:

Lightweight: Codeigniter is lightweight compared to other PHP based frameworks. Writing code is easy and fast in this framework.

No Installation: Codeigniter does not require any further installation which is mandatory in some of the PHP frameworks. You only have to incorporate the Codeigniter library to start working with codeigniter.

Outstanding User guide: Codeigniter gives superb documentation and user guides with proper examples.

Flexibility: Codeigniter enables us to quickly expand and extend on its basic architecture which makes it simpler to split the mould and create some truly unique web applications.

Video Tutorial For Codeigniter: