Credit card transaction ID gives ooo

Without some idea or of your code, we have no idea at all what your problem could be...
Use the "Improve question" widget to edit your question and post a relevant code fragment.
Be aware though, that you should never, ever, accept code from a insecure website to handle anything to do with real money.
You do not know who is giving you the code, you do not know what it does, you do not know that it places the monies correctly into the appropriate account, without passing the details to any third parties.

Only get such code from reputable card transaction service companies - the scope for fraud otherwise is far to large. And remember, you personally could be liable for any monies lost if your action seem to be negligent - which getting your code from a public forum would most certainly be!