How to Install CodeIgniter on Ubuntu 18.04

CodeIgniter is an Open-Source and powerful PHP framework. It is used to develop web applications which are very small but very powerful. CodeIgniter’s helps people to write their own applications which is much faster and easier by providing useful libraries.

This tutorial will help you to install CodeIgniter on Ubuntu 18.04 Bionic system.

Step 1: Prerequisites

CodeIgniter framework required PHP, MySQL and Apache/Nginx on the system. Use one the following tutorial to install LAMP server on your system.

• INSTALL LAMP ON UBUNTU USING PPA

Step 2: Download and Extract CodeIgniter

Now, use-mention steps to download the CodeIgniter also you can download the CodeIgniter from the official website.

# cd /var/www/html
# wget https://github.com/bcit-ci/CodeIgniter/archive/3.1.9.zip 

Extract the archive file and place in document root.

# unzio 3.1.9.zip
# mv CodeIgniter-3.1.9/ codeigniter 

Step 3: Create a Database

Now connect MySQL with root and create the database for CodeIgniter.

# mysql -u root -p
mysql> create database codeigniter;
mysql> GRANT ALL ON codeigniter.* TO 'codeigniter'@'localhost' IDENTIFIED BY 'redhat';
mysql> FLUSH PRIVILEGES;
mysql> quit 

Step 4: Configure CodeIgniter

After creating the database, edit database configuration file and update the database setting.

# vim /var/www/html/codeigniter/config/database.php

$db['default'] = array(
         'dsn'   => '',
         'hostname' => 'localhost',
         'username' => 'codeigniter',
         'password' => 'redhat',
         'database' => 'codeigniter',
         '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
 );

Now configure the base URL for your application.

# vim /var/www/html/codeigniter/config/config.php

update base_url with your domain name:

$config['base_url'] = 'http://srv.techoism.net';

Step 5: Configure Apache

As we are using Apache, so create apache virtual host for your CodeIgniter.

# vim /etc/apache2/sites-available/codeigniter.conf

<VirtualHost *:80>
   ServerAdmin dennis.r@techoism.com
   DocumentRoot /var/www/html/codeigniter
   ServerName codeigniter.techoism.net
   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
</Directory>
</VirtualHost>  

Step 6: Access CodeIgniter

You have successfully setup CodeIgniter. Now you can access CodeIgniter application in your browser and start developing from CodeIgniter.

# http://srv.techoism.net

Enjoy it!