• Special files

• {{horde/lib/core.php}}: This file

• sets some required PHP configuration settings

• loads libraries required by all Horde applications

• Instantiates the global Browser object

There are several files with a special meaning that can be found in every Horde application:

• {{index.php}}: This script is loaded if a user enters an application. Usually this script doesn't have any functionality but simple loads the default view of the application, sometimes depending on the user's preferences.

• {{lib/base.php}}: This file is loaded from every script of the application. Its purpose is to:

• define some global constants

• load {{core.php}}

• initialize the ((Doc/Dev/Registry|Registry))

• redirect to the login screen if the user is not authenticated and guest access is disabled

• load common Horde libraries

• initialize the ((Doc/Dev/Notification| Notification System))

• load common application specific libraries

• initialize common global application specific objects and variables

• start output compression

• {{lib/api.php}}: This files defines and implements all methods that an application is exposing through the ((Doc/Dev/Registry|Registry)) to the other Horde applications and the Horde RPC servers.

• {{themes/screen.css}}: This is a CSS file that defines all application specific style sheet rules.