CodeIgniter Directory Structure

In general  CodeIgniter Framework has file and directory as the bellow list-

• application
• system
• tests
• user_guide_src
• .gitignore
• .travis.yml
• composer.json
• contributing.md
• DCO.txt
• index.php
• license.text
• phpdoc.dist.xml
• readme.rst

Generally we work with index.php file and application directory. For advance we work with system directory and for compos we use composer.json file.

In the application directory we have a lot of directory. The directory structure under application directory as  following list - 

• cache
• config
• controllers
• core
• helpers
• hooks
• language
• libraries
• logs
• models
• third_party
• view
• .htaccess
• index.html

In the system directory we have a lot of directory. The directory structure under application directory as  following list - 

• core
• database
• fonts
• helpers
• language 
• libraries
• .htaccess
• index.html