By default it is assumed that you only intend to use CodeIgniter to manage one application, which you will build in your application/ directory. It is possible, however, to have multiple sets of applications that share a single CodeIgniter installation, or even to rename or relocate your application directory.
If you would like to rename your application directory you may do so as long as you open your main index.php file and set its name using the $application_directory variable:
It is possible to move your application directory to a different location on your server than your web root. To do so open your main index.php and set a full server path in the $application_directory variable:
If you would like to share a common CodeIgniter installation to manage several different applications simply put all of the directories located inside your application directory into their own sub-directory.
For example, let’s say you want to create two applications, named “foo” and “bar”. You could structure your application directories like this:
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