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failTrans() forces a roll back of a smart transaction. The method can be called anywhere inside a transaction scope, but the rollback actually occurs at the point where
completeTrans() is invoked.
/* * Assume database connection */ $db->startTrans(); /* * some reason to rollback transaction */ $db->failTrans(); /* * Lots more code inside the transaction scope */ $db->completeTrans(); //<---- at this point, the rollback is invoked