(PHP 4 >= 4.0.6, PHP 5)
fbsql_rollback — Rollback a transaction to the database
Ends the current transaction by rolling back all statements issued since last commit.
This command is only needed if autocommit is set to false.
A FrontBase link identifier returned by fbsql_connect() or fbsql_pconnect().
If optional and not specified, the function will try to find an open link to the FrontBase server and if no such link is found it will try to create one as if fbsql_connect() was called with no arguments.
如果成功则返回 TRUE，失败则返回 FALSE。