CodeIgniter Framework:

Ar-PHP Component:

1. Download CodeIgniter (click here).
    
2. Unpack into your web-server.
    
3. Drag the application folder outside of the system folder (not necessary but considered good practice), keep only application and system folders, the rest is documentation, you should not upload it to your webserver.
    
4. The structure looks like this:
   
   webroot/cifolder/application/
           /system/
           /index.php
    
5. Download Ar-PHP (click here).
    
6. Unpack and put the Arabic folder AND the main class Arabic.php into the libraries folder of your application folder.
    
7. The structure looks like this:
   
   webroot/cifolder/application/
           /application/libraries/
                   /libraries/Arabic/
                   /libraries/Arabic.php
    
8. Refer to the CI documentation for configuration (mostly 'autoload.php', 'config.php', 'routes.php').
    
9. Simple example of usage:
   
   - Controller (called here 'arabtest.php')
   - View (called here 'arabic_view.php')
   - Sample output (click here)