Re: Credit card checks?

Correct. Your first "parsing" of the credit card number could be done by the web server, just to check its length and format: you could use strlen() function in PHP to count the digits, to verify it is correct. You could strip the dashes with ereg_replace("-", "", $credit_card_number) then count its length. To actually verify that the card submitted is a number assigned by VISA, your system would have to connect via LinkPoint, AuthorizeNet, or a service like that. They do address comparisson, bank assigner id comparison, and much much more. Without a merchant account, your PHP could only verify that it "appears" to be a valid credit card number. The only other option is to get your local bank to hook you up with a merchant account and transaction equipment, and you could just run the cards "by hand". That option doesnt sound very fun but some folks prefer doing biz that way. I dont know about AuthorizeNet, but LinkPoint has an API written in PHP that is supposed to be inexpensive, and easilly integratable into any PHP apps. I heard it was only $125.00.. Not a bad price for a few hundred lines of code. I am in no way affiliated with or trying to advertise for these companies. Hope this helps, Kris Jas wrote:

So there is no way to use some sort of string comparison to check the number then? I would have to have a merchant account? Sorry for being nieve, just never tried to work with credit card numbers etc. Jas "Kristopher Yates" <kris@2binteractive.com> wrote in message news:3D3DA374.8080206@2binteractive.com...

You should contact Visa International Service Association to determine what constitues a "valid" credit card number. Just FYI, a valid format is 16 digits; aaaa-bbbb-cccc-dddd. I believe VISA normally begins with "41" as the first two digits, however, I am not a Visa Int. agent but I am a client. Ultimately, you would need a merchant account to verify its validity, AFTER you have verified its format for accuracy. HTH Kris Jas wrote:

Yeah, I have looked at that class file and I don't want someone elses example to use, I want to build my own but have no way of knowing what

makes

up a valid visa number etc.... Jas "Richard Baskett" <php@baskettcase.com> wrote in message news:B962EBBF.C22F%php@baskettcase.com...

Try this: http://www.AnalysisAndSolutions.com/code/ccvs-ph.htm Rick A sense of humor can help you over look the unattractive, tolerate the unpleasant, cope with the unexpected, and smile through the

unbearable. -

Moshe Waldoks

From: "Jas" <jlgerfen@hotmail.com> Date: Tue, 23 Jul 2002 12:09:48 -0600 To: php-general@lists.php.net Subject: [PHP] Credit card checks? Just wondering if anyone has come across the need to develop a class to

test

a string of numbers based on a credit card type. If you have where

would I

be able to get information on what string of numbers is consistent with

each

of the different credit cards? Any help would be appreciated! Jas -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php