| Horde_SessionHandler | This class provides the interface to the session storage backend. |
| Horde_SessionHandler_Exception | Exception handler for the SessionHandler package. |
| Horde_SessionHandler_Storage | This is the abstract class that all SessionHandler storage drivers inherit from. |
| Horde_SessionHandler_Storage_Builtin | SessionHandler storage implementation for PHP's built-in session handler. |
| Horde_SessionHandler_Storage_External | SessionHandler storage implementation for an external save handler defined via configuration parameters. |
| Horde_SessionHandler_Storage_File | SessionHandler implementation for storage in text files. |
| Horde_SessionHandler_Storage_Hashtable | Horde_HashTable SessionHandler driver. |
| Horde_SessionHandler_Storage_Memcache | Memcache sessionhandler driver. |
| Horde_SessionHandler_Storage_Mongo | MongoDB storage driver. |
| Horde_SessionHandler_Storage_Sql | SessionHandler storage implementation for SQL databases. |
| Horde_SessionHandler_Storage_Stack | SessionHandler storage implementation that will loop through a list of storage drivers to handle the session information. |