Rolls back all outstanding statements for the Oracle
connection.
Return Values
Returns TRUE
on success or FALSE
on failure.
Notes
Note:
Transactions are automatically rolled back when you close
the connection, or when the script ends, whichever is soonest. You
need to explicitly call oci_commit() to commit
the transaction, or oci_rollback() to abort it.
Note:
In PHP versions before 5.0.0 you must use ocirollback() instead.
This name still can be used, it was left as alias of
oci_rollback() for downwards compatability.
This, however, is deprecated and not recommended.