Fuel has four constants in the global namespace to direct you to important directories. Fuel uses them internally to locate classes and other files. These constants are set in public/index.php.
Note: When you move any of fuel's prime folders (app, core, public, packages) be sure to update your index.php to direct fuel to the right paths.
KEYS :
* APPPATH : Path to the application directory (/path/to/fuel/app). This is where your application directories and code reside.
* COREPATH : Path to the core directory (/path/to/fuel/core). This is where all the Fuel classes live.
* DOCROOT : Path to the location where the 'startup script' is. For your web application, path to the public directory (/path/to/public). This is where index.php resides. Everything accessible to user lives and is accessible via the browser. For oil command, path to where oil command resides.
* PKGPATH : Path to the packages directory (/path/to/fuel/packages). This is where your packages are installed (when installed through oil).
* VENDORPATH : Path to the composer root directory (/path/to/fuel/vendor). This is where your composer installs the libraries downloaded from packagist.org.
