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CreditCard(3)	      User Contributed Perl Documentation	 CreditCard(3)

NAME
       "Business::CreditCard" - Validate/generate credit card checksums/names

SYNOPSIS
	   use Business::CreditCard;

	   print validate("5276 4400 6542 1319");
	   print cardtype("5276 4400 6542 1319");
	   print generate_last_digit("5276 4400 6542 131");

       Business::CreditCard is available at a CPAN site near you.

DESCRIPTION
       These subroutines tell you whether a credit card number is self-
       consistent -- whether the last digit of the number is a valid checksum
       for the preceding digits.

       The validate() subroutine returns 1 if the card number provided passes
       the checksum test, and 0 otherwise.

       The cardtype() subroutine returns a string containing the type of card.
       The list of possible return values is more comprehensive than it used
       to be, but additions are still most welcome.

       Possible return values are:

	 VISA card
	 MasterCard
	 Discover card
	 American Express card
	 enRoute
	 JCB
	 BankCard
	 Switch
	 Solo
	 China Union Pay
	 Laser
	 Unknown

       "Not a credit card" is returned on obviously invalid data values.

       Versions before 0.31 may also have returned "Diner's Club/Carte
       Blanche" (these cards are now recognized as "Discover card").

       As of 0.30, cardtype() will accept a partial card masked with "x", "X',
       ".", "*" or "_".	 Only the first 2-6 digits and the length are
       significant; whitespace and dashes are removed.	To recognize just
       Visa, MasterCard and Amex, you only need the first two digits; to
       recognize almost all cards except some Switch cards, you need the first
       four digits, and to recognize all cards including the remaining Switch
       cards, you need the first six digits.

       The generate_last_digit() subroutine computes and returns the last
       digit of the card given the preceding digits.  With a 16-digit card,
       you provide the first 15 digits; the subroutine returns the sixteenth.

       This module does not tell you whether the number is on an actual card,
       only whether it might conceivably be on a real card.  To verify whether
       a card is real, or whether it's been stolen, or to actually process
       charges, you need a Merchant account.  See Business::OnlinePayment.

       These subroutines will also work if you provide the arguments as
       numbers instead of strings, e.g. "validate(5276440065421319)".

PROCESSING AGREEMENTS
       Credit card issuers have recently been forming agreements to process
       cards on other networks, in which one type of card is processed as
       another card type.

       By default, Business::CreditCard returns the type the card should be
       treated as in the US and Canada.	 You can change this to return the
       type the card should be treated as in a different country by setting
       $Business::CreditCard::Country to your two-letter country code.	This
       is probably what you want to determine if you accept the card, or which
       merchant agreement it is processed through.

       You can also set $Business::CreditCard::Country to a false value such
       as the empty string to return the "base" card type.  This is probably
       only useful for informational purposes when used along with the default
       type.

       Here are the currently known agreements:

       Most Diner's club is now identified as Discover.	 (This supercedes the
       earlier identification of some Diner's club cards as MasterCard inside
       the US and Canada.)
       JCB cards in the 3528-3589 range are identified as Discover inside the
       US and Canada.
       China Union Pay cards are identified as Discover cards outside China.

NOTE ON INTENDED PURPOSE
       This module is for verifying real world credit cards.  It is NOT a
       pedantic implementation of the ISO 7812 standard, a general-purpose
       LUHN implementation, or intended for use with "creditcard-like account
       numbers".

AUTHOR
       Jon Orwant

       The Perl Journal and MIT Media Lab

       orwant@tpj.com

       Current maintainer is Ivan Kohler <ivan-business-creditcard@420.am>.
       Please don't bother Jon with emails about this module.

       Lee Lawrence <LeeL@aspin.co.uk>, Neale Banks <neale@lowendale.com.au>
       and Max Becker <Max.Becker@firstgate.com> contributed support for
       additional card types.  Lee also contributed a working test.pl.
       Alexandr Ciornii <alexchorny@gmail.com> contributed code cleanups.

COPYRIGHT AND LICENSE
       Copyright (C) 1995,1996,1997 Jon Orwant Copyright (C) 2001-2006 Ivan
       Kohler Copyright (C) 2007-2009 Freeside Internet Services, Inc.

       This library is free software; you can redistribute it and/or modify it
       under the same terms as Perl itself, either Perl version 5.8.8 or, at
       your option, any later version of Perl 5 you may have available.

SEE ALSO
       Business::CreditCard::Object is a wrapper around Business::CreditCard
       providing an OO interface.  Assistance integrating this into the base
       Business::CreditCard distribution is welcome.

       Business::OnlinePayment is a framework for processing online payments
       including modules for various payment gateways.

perl v5.14.1			  2009-09-28			 CreditCard(3)
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