How to Install CodeIgniter on Ubuntu 20.04

Install CodeIgniter on Ubuntu 20.04

In this article, we will have explained the necessary steps to install and configure CodeIgniter on Ubuntu 20.04 LTS. Before continuing with this tutorial, make sure you are logged in as a user with sudo privileges. All the commands in this tutorial should be run as a non-root user.

CodeIgniter is one of the most popular PHP frameworks that was first released in 2006. The first developer of CodeIgniter was EllisLab which was then continued by the British Columbia Institute of Technology. Codeigniter 4 is the latest version available for application development.

Install CodeIgniter on Ubuntu 20.04

Step 1. First, before you start installing any package on your Ubuntu server, we always recommend making sure that all system packages are updated.

sudo apt update
sudo apt upgrade

Step 2. Install LAMP Stack on Ubuntu.

CodeIgniter is built with PHP. You can host it like you would any other web app is written in PHP. So, you’re going to need to set Ubuntu up as either a LAMP server. If you haven’t done so already, use our traditional LAMP guide to set up Ubuntu to serve PHP before you continue.

Step 3. Download and Install CodeIgniter on the Ubuntu system.

Now download the CodeIgniter from the official website:

cd /var/www/htmlwget

Extract the archive file and place it in the document root:

mv CodeIgniter-3.1.11/ codeigniter

Step 3. Create a Database CodeIgniter.

CodeIgniter uses the MySQL database to store all its data. Log in to your MySQL server with the following command and enter your MySQL root password:

mysql -u root -p

Once you’re in the MySQL console, create a new database:

CREATE DATABASE codeigniterdb;
GRANT ALL PRIVILEGES ON codeigniterdb.* TO 'codeigniter_user'@'localhost' IDENTIFIED BY 'your-passwd';

Step 4. Configure CodeIgniter.

Once successfully creating the database, edit the database configuration file and update the database setting:

nano /var/www/html/codeigniter/config/database.php

Add the following lines:

$db['default'] = array(
         'dsn'   => '',
         'hostname' => 'localhost',
         'username' => 'codeigniter_user',
         'password' => 'your-passwd',
         'database' => 'codeigniterdb',
         'dbdriver' => 'mysqli',
         'dbprefix' => '',
         'pconnect' => FALSE,
         'db_debug' => (ENVIRONMENT !== 'production'),
         'cache_on' => FALSE,
         'cachedir' => '',
         'char_set' => 'utf8',
         'dbcollat' => 'utf8_general_ci',
         'swap_pre' => '',
         'encrypt' => FALSE,
         'compress' => FALSE,
         'stricton' => FALSE,
         'failover' => array(),
         'save_queries' => TRUE

Next, configure the base URL for your application:

nano /var/www/html/codeigniter/config/config.php

Update base_url with your domain name:

$config['base_url'] = '';

Step 5. Configure Apache.

Now create an apache virtual host for your CodeIgniter:

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

Add the following file:

<VirtualHost *:80>
   ServerAdmin [email protected]
   DocumentRoot /var/www/html/codeigniter
   ErrorLog ${APACHE_LOG_DIR}/error.log
   CustomLog ${APACHE_LOG_DIR}/access.log combined
<Directory "/var/www/html/codeigniter">
   Options Indexes FollowSymLinks
   AllowOverride All Order allow,deny
   Allow from all Require all granted

Restart apache2 service:

sudo a2ensite codeigniter.conf
sudo systemctl restart apache2

Step 6. Accessing CodeIgniter.

Now you can access the CodeIgniter application in your browser and start developing from CodeIgniter:

That’s all you need to do to install CodeIgniter on Ubuntu 20.04 LTS Focal Fossa. I hope you find this quick tip helpful. For further reading on CodeIgniter PHP Framework, please refer to their official knowledge base. If you have questions or suggestions, feel free to leave a comment below.