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Credit Card validation routine. Uses MOD 10 to check if credit card
number is valid.

Validating Credit Card Numbers Without Bank Involvement

A set of functions to check the validity of a credit card number.

After discovering some credit card validation routines didn't work -
here is one that I found works with all the numbers I have tried so far

Validation function for LUHNMod10 and variant. Can discriminate credit
card numbers of varying lengths. Uses [Double >> Sum-of-Digits]

Credit Card Identification and Validation Class - The credit card class
provides methods for cleaning, validating and identifying the type of
credit card numbers.

Real-Time Transaction Processing PHP Class. Credit Cards & Checks.
Supports system check, address verification, authorization and deposit,
deposit, credit, commercial card, electronic check debit, and more.

ECHO-PHP Class Real Time Transaction Processor v1.4.4 for Credit Cards
and Checks / ACH



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-----Original Message-----
From: Jeff Lewis [mailto:[EMAIL PROTECTED]] 
Sent: Saturday, September 07, 2002 11:03 PM
Subject: [PHP] Credit Card Validation

I know it's been posted here several times and I've looked through the
archives but I just need something very simple for this. I have a form
that already takes in user information but now before accepting the
information, I'd like to pass the credit card information to a function
and return true or false.

Is anyone using something like this that is simple?


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