Returns: TRUE on
success, FALSE on error.
fbsql_close() closes the
connection to the FrontBase server that's associated with the
specified link identifier. If
link_identifier isn't specified, the last opened
link is used.
Using fbsql_close() isn't
usually necessary, as non-persistent open links are
automatically closed at the end of the script's
execution.
See also: fbsql_connect() and
fbsql_pconnect().