ibase_rollback

Roll back a transaction (PHP 3 >= 3.0.7, PHP 4, PHP 5)
bool ibase_rollback ( [resource link_or_trans_identifier] )

If called without an argument, this function rolls back the default transaction of the default link. If the argument is a connection identifier, the default transaction of the corresponding connection will be rolled back. If the argument is a transaction identifier, the corresponding transaction will be rolled back. 如果成功则返回 TRUE,失败则返回 FALSE