(PHP 4 >= 4.0.6, PHP 5)
fbsql_autocommit — Enable or disable autocommit
Returns the current autocommit status.
由 fbsql_connect() 或 fbsql_pconnect() 返回的 FrontBase 链接标识符.
如可选并未指定，函数会尝试查找一个到 FrontBase 服务器的开放链接，且如没有找到这样的链接，会尝试通过不带参数调用 fbsql_connect() 来创建一个。
If this optional parameter is given the auto commit status will be changed.
With OnOff set to TRUE each statement will be committed automatically, if no errors was found.
With OnOff set to FALSE the user must commit or rollback the transaction using either fbsql_commit() or fbsql_rollback().
Returns the current autocommit status, as a boolean.