Re: Credit card number checker?
| From: | John Monfort | Date: | Tue, 17 Jul 2001 11:53:10 +0000 |
| Subject: | Re: Credit card number checker? | ||
| References: | 1 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-58258@lists.php.net to get a copy of this message | ||
> What companies issue card numbers that are not 16 numbers? Are
> they non-US cards? I haven't ever seen a card that wasn't 16 numbers.
A valid VISA card has between 13-16 digits.
I believe AMERICAN EXPRESS only has 15 digits.
-john
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On Mon, 16 Jul 2001, Christopher Ostmo wrote:
> Ashley M. Kirchner pressed the little lettered thingies in this order...
>
> > Christopher Ostmo wrote:
> >
> > > By law, the numbers are supposed to be
> > > generated at random and not generated by any kind of algorithm or
> > > formula.
> >
> > CC# must pass the Luhn MOD 10 formula, so the generated numbers can't
> > be
> > (totally) random - they have to conform to the formula.
> >
>
> I just responded to this separately... Basically, my earlier research on
> the issue must have been wrong.
>
> > Also, not all credit cards have 16 numbers.
> >
>
>
> Christopher Ostmo
> a.k.a. tech@AppIdeas.com
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