How to Install CodeIgniter 4 on Ubuntu 18.04

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 was just released on February 24, 2020. The date was chosen as a tribute to Jim Parry who was the project lead of CodeIgniter who died on January 15, 2020.

*Hosts Configuration*

Configure the /etc/hosts file to define hosts. With this file we can simulate a local domain on a computer without having to use an internet domain or install a DNS server.


1 sudo nano /etc/hosts

Add myci.local host


1 myci.local

*Install Apache*

Install Apache web server


1 2 3 sudo apt update sudo apt install apache2 -y sudo systemctl status apache2

Apache service status must be active (running)

apache2 service status

*Install PHP*

Install PHP with the extensions


1 2 sudo apt install php libapache2-mod-php php-cli php-common php-mbstring php-gd php-intl php-xml php-mysql php-zip php-json php-curl -y sudo systemctl restart apache2

Test the results of installing PHP by creating a PHP Info file


1 2 cd /var/www/html sudo nano info.php

Call the phpinfo () function



Browse http://myci.local/info.php

PHP Info

*Install MariaDB*

Install MariaDB database


1 2 sudo apt install mariadb-server -y sudo systemctl status mariadb

The mariadb service must be active (running)

Secure the MariaDB installation


1 sudo mysql_secure_installation

Answer the questions given


1 2 3 4 5 6 Enter current password for root (enter for none): ENTER Set root password? [Y/n] y Remove anonymous users? [Y/n] y Disallow root login remotely? [Y/n] y Remove test database and access to it? [Y/n] y Reload privilege tables now? [Y/n] y

Login MariaDB and create a database and user for myci


1 2 3 4 5 6 sudo mysql -u root -p create database myci; create user ‘myci’@’localhost’ identified by ‘secret’; grant all privileges on myci.* to ‘myci’@’localhost’; flush privileges; exit;

*Install CodeIgniter*

CodeIgniter can be installed in 3 ways, manual installation, composer installation, and git installation. The method used in this tutorial is manual installation.

Download CodeIgniter 4 latest release


1 wget -c -O CodeIgniter-4.0.2.tar.gz

Extract CodeIgniter


1 tar xzvf CodeIgniter-4.0.2.tar.gz

Move the extracted folder and rename to myci.local


1 sudo mv CodeIgniter4-4.0.2 /var/www/myci.local

Change the owner and folder permissions


1 2 3 cd /var/www sudo chown -R .www-data myci.local sudo chmod -R 775 myci.local

Configure the Apache virtual host for myci.local


1 2 cd /etc/apache2/sites-available sudo nano myci.local.conf

Enter the virtual host configuration


1 2 3 4 5 6 7 8 9 10 11     ServerName myci.local     DocumentRoot /var/www/myci.local/public              Options Indexes FollowSymLinks MultiViews         AllowOverride All         Require all granted          ErrorLog /var/log/apache2/myci.local_error.log     CustomLog /var/log/apache2/myci.local_requests.log combined

Activate virtual host and restart apache2 service


1 2 3 4 sudo a2ensite myci.local.conf sudo a2enmod rewrite sudo systemctl restart apache2 sudo systemctl status apache2

Browse http://myci.local

Welcome to CodeIgniter 4

*Database Connection Configuration*

Open the database connection configuration file using a text editor. The configuration file is /var/www/myci.local/app/Config/Database.php.

Fill in a database connection


1 2 3 4 5 6 7 8 … public $default = [         ‘DSN’      => ”,         ‘hostname’ => ‘localhost’,         ‘username’ => ‘myci’,         ‘password’ => ‘secret’,         ‘database’ => ‘myci’, …

*Command Line Tool*

CodeIgniter 4 has a command line tool called spark, run it in the project’s root folder.


1 2 cd /var/www/myci.local php spark

CodeIgniter spark command line tool

Showing help from the command


1 php spark migrate help

spark help

Good luck 🙂

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