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Install CodeIgniter on Ubuntu 24.04

CodeIgniter is an open-source, free PHP framework that facilitates the creation of dynamic, quick websites. Development is quick and easy because of its lightweight architecture and straightforward structure. The article covers the key features of CodeIgniter, how to install it, and how to verify its version.

What is CodeIgniter?

CodeIgniter is an open-source, free PHP framework for creating dynamic, quick websites. It is perfect for developers who aspire to build websites fast and effectively because of its lightweight design and straightforward structure.

Key Features of CodeIgniter

Feature	Description
MVC Architecture	Separates data, logic, and design, keeping code organized and easy to maintain.
Fast and Lightweight	Minimal overhead ensures better performance and faster page loads.
Built-in Libraries	Provides tools for database handling, forms, sessions, and more, reducing repetitive coding.
Clear Documentation	Step-by-step guides help developers learn and implement the framework efficiently.
Flexible Design	Allows adaptation to project needs without strictly enforcing MVC.
Strong Security	Includes protections against threats like SQL injection and cross-site scripting.

How to Use Composer to Install CodeIgniter

One of the easiest ways to install CodeIgniter is by using Composer, a PHP dependency manager.

Steps:

1. Create a new project directory:

mkdir my_project

cd my_project

2. Install CodeIgniter using Composer:

composer create-project codeigniter4/appstarter.

3. Start the built-in PHP server to test:

php spark serve

4. Open your browser at http://localhost:8080 to see the CodeIgniter welcome page.

Get the full solution to CodeIgniter generating excessive session files.

Steps to Install CodeIgniter on Ubuntu 24.04

Step 1: Install Apache and PHP

Run the following commands to install Apache and PHP:

apt update -y

apt install apache2 php php-cli php-common php-imap php-redis php-snmp php-xml php-zip php-mbstring php-curl libapache2-mod-php php-intl -y

systemctl start apache2

systemctl enable apache2

php -v

Install Composer:

curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/bin --filename=composer

composer --version

Step 2: Create a CodeIgniter Project

Navigate to the web root and create a new project:

cd /var/www/html

composer create-project codeigniter4/appstarter app

chown -R www-data:www-data /var/www/html/app

Step 3: Configure Apache Virtual Host

Create a new virtual host file:

nano /etc/apache2/sites-available/codeigniter.conf

Add the configuration:

<VirtualHost *:80>

ServerName web.example.com

DocumentRoot /var/www/html/app/public

<Directory /var/www/html/app>

AllowOverride All

</Directory>

ErrorLog ${APACHE_LOG_DIR}/error.log

CustomLog ${APACHE_LOG_DIR}/access.log combined

</VirtualHost>

Enable the site and reload Apache:

a2ensite codeigniter.conf

systemctl reload apache2

Step 4: Access CodeIgniter UI

Open your browser at http://web.example.com to view the CodeIgniter interface.

How to Check the CodeIgniter Version

Method 1: Using the Global Constant

CodeIgniter stores its version in a global constant CI_VERSION. You can check it in:

root_folder/vendor/codeigniter/framework/system/CodeIgniter.php

Look for the line defining CI_VERSION.

Method 2: Using a View File

1. Create a new view file in the views folder, e.g., CI_ver.php:

<?php

echo CI_VERSION;

?>

2. Access this view through a controller to display the current CodeIgniter version.

See how you can resolve CodeIgniter database errors step by step.

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Conclusion

In short, you can easily install CodeIgniter on an Ubuntu 24.04 server by following these steps. This setup provides a fast, secure, and organized environment for developing dynamic web applications.

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