Brian Dunning's FileMaker Custom Functions

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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Klaus-Dieter Brügmann   Klaus-Dieter Brügmann
kade project
http://www.kade-project.de

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  Sample input:
complete card number ; ""

complete card number ; "Card"
  Sample output:
check digit

card name

(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".

 

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