Here's a pretty good explanation in English: http://www.beachnet.com/~hstiles/cardtype.html
Phil Davis
Sarah Reichelt wrote:
Sorry no idea how to validate a credit card number ;-)
A good start to this is to check what the first digit is. If it begins with a 4 it is a VISA card. If it begins with a 5 it is a MasterCard.
That may be true in the USA but it isn't true in Australia. Here Mastercard start with 5 but Visa can start with 4 or 5
:-) Sarah
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