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<? |
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/* |
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+----------------------------------------------------------------------+ |
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| Copyright (c) 2000 J.A.Greant | |
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| (See end of file for usage notes and licensing information.) | |
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+----------------------------------------------------------------------+ |
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*/ |
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|
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class CreditCard |
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{ |
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function clean_no ($cc_no) |
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{ |
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// Remove non-numeric characters from $cc_no |
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return ereg_replace ('[^0-9]+', '', $cc_no); |
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} |
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|
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function identify ($cc_no) |
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{ |
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$cc_no = CreditCard::clean_no ($cc_no); |
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|
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// Get card type based on prefix and length of card number |
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if (ereg ('^4(.{12}|.{15})$', $cc_no)) |
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return 'Visa'; |
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if (ereg ('^5[1-5].{14}$', $cc_no)) |
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return 'Mastercard'; |
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if (ereg ('^3[47].{13}$', $cc_no)) |
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return 'American Express'; |
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if (ereg ('^3(0[0-5].{11}|[68].{12})$', $cc_no)) |
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return 'Diners Club/Carte Blanche'; |
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if (ereg ('^6011.{12}$', $cc_no)) |
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return 'Discover Card'; |
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if (ereg ('^(3.{15}|(2131|1800).{11})$', $cc_no)) |
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return 'JCB'; |
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if (ereg ('^2(014|149).{11})$', $cc_no)) |
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return 'enRoute'; |
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|
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return 'unknown'; |
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} |
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|
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function validate ($cc_no) |
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{ |
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// Reverse and clean the number |
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$cc_no = strrev (CreditCard::clean_no ($cc_no)); |
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|
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// VALIDATION ALGORITHM |
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// Loop through the number one digit at a time |
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// Double the value of every second digit (starting from the right) |
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// Concatenate the new values with the unaffected digits |
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for ($ndx = 0; $ndx < strlen ($cc_no); ++$ndx) |
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$digits .= ($ndx % 2) ? $cc_no[$ndx] * 2 : $cc_no[$ndx]; |
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|
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// Add all of the single digits together |
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for ($ndx = 0; $ndx < strlen ($digits); ++$ndx) |
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$sum += $digits[$ndx]; |
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|
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// Valid card numbers will be transformed into a multiple of 10 |
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return ($sum % 10) ? FALSE : TRUE; |
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} |
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|
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function check ($cc_no) |
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{ |
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$valid = CreditCard::validate ($cc_no); |
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$type = CreditCard::identify ($cc_no); |
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return array ($valid, $type, 'valid' => $valid, 'type' => $type); |
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} |
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} |
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|
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/* |
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+----------------------------------------------------------------------+ |
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| FILE NAME: CreditCard.pkg | |
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+----------------------------------------------------------------------+ |
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| Author: J.A.Greant | |
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| Email : zak@nucleus.com | |
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| Date : 2000/11/23 | |
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+----------------------------------------------------------------------+ |
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| The CreditCard class provides methods for cleaning, validating and | |
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| identifying the type of credit card number. The validation algorithm | |
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| and identification procedures are based on information found at: | |
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| http://www.beachnet.com/~hstiles/cardtype.html | |
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| | |
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| CreditCard::clean_no() method | |
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| ------------------------------ | |
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| Strips all non-numeric characters from the passed value and returns | |
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| an integer. This method is called by the other methods in the | |
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| CreditCard class. | |
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| | |
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| USAGE EXAMPLE: | |
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| $cc_no ="5454 5454 5454 5454"; // Has spaces for readability | |
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| $cleaned_cc_no = CreditCard::clean_no ($cc_no); | |
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| print $cleaned_cc_no; // Displays 5454545454545454 | |
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| | |
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| CreditCard::identify() method | |
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| ------------------------------ | |
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| Finds the type of credit card (Mastercard, Visa, etc...) based on | |
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| the length and format of the credit card number. The method can | |
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| identify American Express, Diners Club/Carte Blanche, Discover, | |
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| enRoute, JCB, Mastercard and Visa cards. | |
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| | |
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| USAGE EXAMPLE: | |
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| $cc_no ="5454 5454 5454 5454"; | |
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| print CreditCard::identify ($cc_no); // Returns "Mastercard" | |
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| | |
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| CreditCard::validate() method | |
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| ------------------------------ | |
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| Validate a credit card number using the LUHN formula (mod 10). | |
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| Note that many other kinds of card and account numbers are based on | |
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| the LUHN algorith - including Canadian Social Insurance Numbers. | |
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| | |
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| USAGE EXAMPLE: | |
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| $cc_no ="5454 5454 5454 5454"; | |
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| print CreditCard::validate ($cc_no); // Returns TRUE | |
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| | |
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| CreditCard::check() method | |
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| --------------------------- | |
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| The check() method validates and identifies a credit card, returning | |
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| an array. Indexes 0 and 'valid' will contain TRUE if the card number | |
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| is valid (FALSE if it isn't), while indexes 1 and 'type' will | |
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| the type of card (if known). The presence of the numeric keys allows | |
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| the method to be used with the list() function. | |
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| | |
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| USAGE EXAMPLE: | |
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| $cc_no ="4111 1111 1111 1111"; | |
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| list ($valid, $type) = CreditCard::check ($cc_no); | |
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| print $valid; // Displays 1 (TRUE) | |
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| print $type; // Displays "Visa" | |
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+----------------------------------------------------------------------+ |
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|
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+----------------------------------------------------------------------+ |
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| CVS LOG INFO | |
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+----------------------------------------------------------------------+ |
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$Log: CreditCard.php,v $ |
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Revision 1.1 2002/12/22 13:28:38 jonen |
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+ first init |
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class for advanced creditcard format and type checking |
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|
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Revision 1.2 2000/11/24 07:02:15 zak |
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Added top copyright notice |
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|
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Revision 1.1 2000/11/24 06:58:42 zak |
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Initial commit of credit card class to repository. |
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Cleaned and modified code. |
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Also rewrote significant parts of code so that I could change to the |
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more friendly BSD-style license. |
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|
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|
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+----------------------------------------------------------------------+ |
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| Copyright (c) 2000 J.A.Greant (jag@nucleus.com) | |
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| All rights reserved. | |
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+----------------------------------------------------------------------+ |
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| Redistribution and use in source and binary forms, with or without | |
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| modification, is permitted provided that the following conditions | |
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| are met: | |
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+----------------------------------------------------------------------+ |
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| Redistributions of source code must retain the above copyright | |
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| notice, this list of conditions and the following disclaimer. | |
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| | |
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| Redistributions in binary form must reproduce the above copyright | |
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| notice, this list of conditions and the following disclaimer in the | |
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| documentation and/or other materials provided with the distribution. | |
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| | |
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| Neither the name of the author nor the names of any contributors to | |
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| this software may be used to endorse or promote products derived | |
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| from this software without specific prior written permission. | |
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| | |
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| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
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| ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
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| LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | |
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| FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | |
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| AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, | |
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| INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | |
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| BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
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| LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | |
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| CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
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| LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN | |
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| ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
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| POSSIBILITY OF SUCH DAMAGE. | |
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+----------------------------------------------------------------------+ |
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*/ |
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|
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?> |
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