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CheckSofi ( Sofi )

Validater for the Dutch Sofinumber against the '11-proef'.

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Hartger Visser Teuker Beheer BV http://www.teuker.nl

  Function definition: (Copy & paste into FileMaker's Edit Custom Function window)

/*------------------------------------------------------- Function Name: CheckSofi Checks the Dutch sofinumber far validity. Syntax: CheckSofi ( SofiNummer ) Returns True if SofiNummer passes the '11-proef', False if it does not pass the test. A return of 'True' does not mean it's a valid/existing number ! Author - Hartger Visser ----------------------------------------------------------*/ Let ( check = Middle ( Sofi ; 1 ; 1 ) * 9 + Middle ( Sofi ; 2 ; 1 ) * 8 + Middle ( Sofi ; 3 ; 1 ) * 7 + Middle ( Sofi ; 4 ; 1 ) * 6 + Middle ( Sofi ; 5 ; 1 ) * 5 + Middle ( Sofi ; 6 ; 1 ) * 4 + Middle ( Sofi ; 7 ; 1 ) * 3 + Middle ( Sofi ; 8 ; 1 ) * 2 + Middle ( Sofi ; 9 ; 1 ) * -1 ; If ( check / 11 = Int ( check / 11 ) ; " true" ; "false" ) ) Click to copy

Checks the Dutch sofinumber far validity.
Syntax: CheckSofi ( SofiNummer )

Returns True if SofiNummer passes the '11-proef',
False if it does not pass the test.
A return of 'True' does not mean it's a valid/existing number !

 

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