(PHP 3 >= 3.0.7, PHP 4, PHP 5)
ibase_rollback -- Roll back a transaction
Description
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.
     Returns TRUE on success or FALSE on failure.