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 FileMaker Pro Custom Functions

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ValidateMagStripes ( Track1 ; Track2 ; Track3 )

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  Average rating: 4.8  (50 votes)
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Tim Griffith, NA

Validates data integrity of magnetic stripe tracks.

Sample Input:
ValidateMagStripes ( MyTrack1 ; MyTrack2 ; MyTrack3 )
Sample Output:
Track 1; Character content 'Valid'; Length is within limits.
This is not Track 2!; Invalid characters in Track 2; Length is within limits.
Track 3 not available

 Then copy & paste into FileMaker Advanced's Edit Custom Function window.


Validate Magnetic Stripe Tracks

Author: Tim Griffith

Format: ValidateMagStripes ( Track1 ; Track2 ; Track3 )

This will analyze the data intended for encoding onto,
or retrieval from, the tracks of a magnetic stripe on, for
example, a plastic card. It will identify character input
problems such as invalid ASCII characters per track,
test for data length per track, and determine if starting
and ending sentinels are correct per track.

The calculated result is three lines of text separated by
carriage returns (so expand your text result field to
view all calculated lines).

When testing for data length I have not taken into account
the LRC, since it is never a part of data encoding, and never
a product of reading the mag stripe (within the sentinels).

Note: these functions are not guaranteed or supported by Please contact the individual developer with any questions or problems.

This is my Custom Function and I want to edit it



wlnys chan, china
January 07, 2015 1:42am

Make a comment about this Custom Function (please try to keep it brief & to the point). Anyone can post:

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