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Joseph Hernandez
Joseph Hernandez

CodeIgniter 3 Download Options: Manual or Composer


CodeIgniter Download 3: A Guide for Web Developers




CodeIgniter is a powerful PHP framework that provides a simple and elegant toolkit to create full-featured web applications. It is one of the most popular and widely used PHP frameworks in the world, thanks to its speed, light weight, ease of use, and security. In this article, we will show you how to download and install CodeIgniter 3, the legacy version of the framework that is still in maintenance mode. We will also explain some of the main features and benefits of using CodeIgniter for web development.




codeigniter download 3



What is CodeIgniter and why use it for web development?




CodeIgniter is an open-source web framework that was created by EllisLab in 2006 and is now a project of the British Columbia Institute of Technology. It follows the Model-View-Controller (MVC) architecture, which separates the logic, presentation, and data layers of an application. This makes the code more organized, reusable, and maintainable.


CodeIgniter has many advantages over other PHP frameworks, such as:


  • It has a small footprint (about 2 MB) and does not require any additional libraries or dependencies.



  • It has a very fast performance and low memory usage, thanks to its optimized core and minimal configuration.



  • It has a clear and comprehensive documentation that covers every aspect of the framework.



  • It has a large and active community that provides support, feedback, and contributions.



  • It has a rich set of built-in libraries and helpers that facilitate common tasks such as database access, form validation, email sending, image manipulation, file uploading, pagination, encryption, caching, etc.



  • It has a flexible URI routing system that allows for search-engine friendly URLs and custom controllers.



  • It has a strong security system that protects against CSRF and XSS attacks, as well as provides data encryption and session management.



  • It has a simple and intuitive syntax that simplifies PHP coding and streamlines web development.



CodeIgniter Download 3




CodeIgniter 3 is the legacy version of the framework that is intended for use with PHP 5.6 or higher. It was released in March 2015 and is currently at version 3.1.13. It is still supported by the developers with security updates, but no new features are added. CodeIgniter 3 is suitable for developers who want to use a stable and proven framework that works on most hosting platforms.


CodeIgniter 4 is the latest version of the framework that is intended for use with PHP 7.4 or higher. It was released in February 2020 and is currently at version 4.1.5. It is a complete rewrite of the framework that introduces many new features and improvements, such as:


  • A modern codebase that follows PHP standards and best practices.



  • A modular structure that allows for easy customization and extension.



  • A powerful CLI tool that enables scaffolding, testing, migration, etc.



  • A built-in testing suite that supports PHPUnit and Codeception.



  • A PSR-4 compliant autoloader that supports namespaces and composer packages.



  • A dependency injection container that manages class dependencies.



  • A query builder database layer that supports multiple connections and drivers.



  • A view parser that supports template engines such as Twig.



  • An event system that triggers actions based on events.



CodeIgniter 4 is suitable for developers who want to use a modern and cutting-edge framework that leverages the latest features of PHP.


To download and install CodeIgniter 3, you have two options: manually or using Composer.


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Manual Download and Installation




To download and install CodeIgniter 3 manually, follow these steps:


  • Go to the official CodeIgniter website and click on the Download button. You will be redirected to a page where you can choose between CodeIgniter 3 and CodeIgniter 4. Click on the Download CodeIgniter 3 button and save the zip file to your computer.



  • Extract the zip file to a folder of your choice. You will see a folder named CodeIgniter-3.1.13 (or the latest version) that contains all the files and folders of the framework.



  • Upload the CodeIgniter folder to your web server or localhost. You can rename the folder to anything you want, such as ci3 or myapp.



  • Open your web browser and navigate to the URL of your CodeIgniter folder. You should see a welcome page that confirms that your installation is successful.



Download and Installation Using Composer




To download and install CodeIgniter 3 using Composer, follow these steps:


  • Make sure you have Composer installed on your computer. If not, you can download it from the official Composer website and follow the installation instructions.



  • Create a new project folder on your computer and open a terminal or command prompt window in that folder.



  • Type the following command to create a new CodeIgniter 3 project using Composer: composer create-project codeigniter/framework:3.* ci3. This will download and install the latest version of CodeIgniter 3 in a folder named ci3 (or any name you choose).



  • Upload the ci3 folder to your web server or localhost.



  • Open your web browser and navigate to the URL of your ci3 folder. You should see a welcome page that confirms that your installation is successful.



How to run and test your CodeIgniter 3 application?




Once you have downloaded and installed CodeIgniter 3, you can start developing your web application using the framework. To run and test your application, you need to do the following:


  • Create your controllers, models, views, libraries, helpers, etc. in the appropriate folders inside the application folder of your CodeIgniter project.



  • Configure your application settings, such as base URL, database connection, encryption key, etc. in the config folder of your application folder.



  • Use the index.php file in the root folder of your CodeIgniter project as the entry point for your application. You can also use .htaccess files to remove the index.php from the URL if you want.



  • Navigate to the URL of your application and see the output of your code. You can also use tools such as Xdebug or PHPUnit to debug and test your code.



Conclusion




In this article, we have shown you how to download and install CodeIgniter 3, the legacy version of the popular PHP framework. We have also explained some of the main features and benefits of using CodeIgniter for web development. We hope you have found this article helpful and informative. If you want to learn more about CodeIgniter, you can visit the following resources:


The official CodeIgniter website:


The official CodeIgniter documentation:


The official CodeIgniter forum:


The official CodeIgniter GitHub repository:


The official CodeIgniter YouTube channel:


Frequently Asked Questions




What is the difference between CodeIgniter 3 and CodeIgniter 4?




CodeIgniter 3 is the legacy version of the framework that is intended for use with PHP 5.6 or higher. It is still supported by the developers with security updates, but no new features are added. CodeIgniter 4 is the latest version of the framework that is intended for use with PHP 7.4 or higher. It is a complete rewrite of the frame


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