This function commits an Oracle transaction. A transaction is defined as all the changes on a given connection since the last commit/rollback, autocommit was turned off or when the connection was established.
성공일 경우 TRUE를, 실패일 경우 FALSE를 반환합니다. Details about the error can be retrieved using the ora_error() and ora_errorcode() functions.
See also ora_commiton() and ora_commitoff().