Codeignetor is a PHP framework used to build a web application that is used widely by the developers over the world. Before you install Codeignetor make sure the following requirements are already installed.

• Webserver apache or nginx
• PHP 5.6
• MySQL
• Composer
  
  

Once you confirm the above component on your server. Proceed to install Codeignetor with the following steps.

1. Set SELinx Status to disable.
   
   

   # SELINUX=disabled

2. Let us create MySQL Database for codeignetor.
   
   

   # create database mycode_db;
   
   grant all privileges on mycodeusr.* to [email protected]'localhost' identified by 'your_password';
   
   flush privileges;
   
   exit

3. Now, we will install Composer Package Manager.
   
   

   # curl -sS https://getcomposer.org/installer | php
   
   # mv composer.phar /usr/local/bin/composer
   
   # chmod +x /usr/local/bin/composer
   
   exit

4. We will install Codeigniter. Go to the root directory html.
   
   

   # cd /var/www/html/

5. Clone CodeIgniter from its git repository.
   
   

   # git clone https://github.com/bcit-ci/CodeIgniter.git

   
   
   
6. We will install required dependencies running composer.
   
   

   # composer install
   

7. Provide file ownership of files to apache user.
   
   

   # chown -R apache:apache /var/www/html/
   

8. We will configure the base url by editing config.php file.
   
   

   # vi /var/www/html/application/config/config.php
   

9. locate the below line.
   
   

   $config['base_url'] = '';
   

10. Modify this line by adding your application url in the quotes.
    
    

    $config['base_url'] = 'http://173.248.174.102';
    

11. To configure Codeignetor Database connection setting, edit the following file with your favorite text editor:
    
    

    # vi /var/www/html/application/config/database.php
    

12. Locate below path.
    
    

    $db['default'] = array(
            'dsn'   => '',
            'hostname' => 'localhost',
            'username' => '',
            'password' => '',
            'database' => '',
            'dbdriver' => 'mysqli',
    

    Change it to:
    
    

    $db['default'] = array(
            'dsn'   => '',
            'hostname' => 'localhost',
            'username' => 'mycode_db',
            'password' => 'your-db-user-password',
            'database' => 'mycodeusr',
            'dbdriver' => 'mysqli',
    

13. Once you are done with the changes, save this file. Access the url which you have added earlier in base_url and verify that codeignator is working.