Returns: An integer value with the current status.
fbsql_db_status() requests the current status of the database specified by database_name. If the link_identifier is omitted the default link_identifier will be used.
The return value can be one of the following constants:
FALSE- The exec handler for the host was invalid. This error will occur when the link_identifier connects directly to a database by using a port number. FBExec can be available on the server but no connection has been made for it.