ValidCard ( pNumber ; pShow )
ValidCard checks the plausibility of a given cardnumber and gives back the check digit or if you want the name of the card.
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complete card number ; "Card"
(or "input error")
Function definition: (Copy & paste into FileMaker's Edit Custom Function window)
ValidCard checks the plausibility of a given cardnumber and gives back the check digit or if you want the name of the card. You can check various types of cards: American Express, Diner's Club, Visa, Mastercard, Discover, JCB, En Route and also the german "Bahncard" and the "Miles&More" card of the german airline "Lufthansa".
Note: these functions are not guaranteed or supported by BrianDunning.com. Please contact the individual developer with any questions or problems.