(no version information, might be only in CVS)
PDO_FIREBIRD DSN -- Connecting to Firebird and Interbase databasesThe PDO_FIREBIRD Data Source Name (DSN) is composed of the following elements:
The DSN prefix is firebird:.
The hostname on which the database server resides.
The port number for the server on which the database is running.
The name of the database.
The name of the user that will connect to the database.
The password for the user.