<?
/*
* CreditCard Class
*
* License:
*
* Copyright (C) 2002 Daniel Fróz Costa
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307 USA
*
* Documentation:
*
* Card Type Prefix Length Check digit
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
* MasterCard 51-55 16 mod 10
* Visa 4 13, 16 mod 10
* AMEX 34, 37 15 mod 10
* Dinners Club/Carte Blanche 300-305, 36, 38 14 mod 10
* Discover 6011 16 mod 10
* enRoute 2014, 2149 15 any
* JCB 3 16 mod 10
* JCB 2131, 1800 15 mod 10
*
* More references:
* http://www.beachnet.com/~hstiles/cardtype.hthml
*
* $Id: creditcard_class.php,v 1.1 2002/02/16 16:02:12 daniel Exp $
*
*/
if(!defined(PHP_CREDITCARD_CLASS))
{
define(PHP_CREDITCARD_CLASS, 1);
define(UNKNOWN, 0);
define(MASTERCARD, 1);
define(VISA, 2);
define(AMEX, 3);
define(DINNERS, 4);
define(DISCOVER, 5);
define(ENROUTE, 6);
define(JCB, 7);
define(CC_OK, 0);
define(CC_ECALL, 1);
define(CC_EARG, 2);
define(CC_ETYPE, 3);
define(CC_ENUMBER, 4);
define(CC_EFORMAT, 5);
define(CC_ECANTYPE, 6);
class creditcard
{
var $number;
var $type;
var $errno;
/*
* Constructor
*/
function creditcard()
{
$this->number = 0;
$this->type = UNKNOWN;
$this->errno = CC_OK;
}
/*
* check method
* return true or false
*/
function check($cardnum)
{
$this->number = $this->_strtonum($cardnum);
if(!$this->detectType($this->number))
{
$this->errno = CC_ETYPE;
return false;
}
if($this->mod10($this->number))
{
$this->errno = CC_ENUMBER;
return false;
}
return true;
}
/*
* detectType method
* returns card type in number format
*/
function detectType($cardnum = 0)
{
if($cardnum)
$this->number = $this->_strtonum($cardnum);
if(!$this->number)
{
$this->errno = CC_ECALL;
return UNKNOWN;
}
if(preg_match("/^5[1-5]\d{14}$/", $this->number))
$this->type = MASTERCARD;
else if(preg_match("/^4(\d{12}|\d{15})$/", $this->number))
$this->type = VISA;
else if(preg_match("/^3[47]\d{13}$/", $this->number))
$this->type = AMEX;
else if(preg_match("/^[300-305]\d{11}$/", $this->number) ||
preg_match("/^3[68]\d{12}$/", $this->number))
$this->type = DINNERS;
else if(preg_match("/^6011\d{12}$/", $this->number))
$this->type = DISCOVER;
else if(preg_match("/^2(014|149)\d{11}$/", $this->number))
$this->type = ENROUTE;
else if(preg_match("/^3\d{15}$/", $this->number) ||
preg_match("/^(2131|1800)\d{11}$/", $this->number))
$this->type = JCB;
if(!$this->type)
{
$this->errno = CC_ECANTYPE;
return UNKNOWN;
}
return $this->type;
}
/*
* detectTypeString
* return string of card type
*/
function detectTypeString($cardnum = 0)
{
if(!$cardnum)
{
if(!$this->type)
$this->errno = CC_EARG;
}
else
$this->type = $this->detectType($cardnum);
if(!$this->type)
{
$this->errno = CC_ETYPE;
return NULL;
}
switch($this->type)
{
case MASTERCARD:
return "MASTERCARD";
case VISA:
return "VISA";
case AMEX:
return "AMEX";
case DINNERS:
return "DINNERS";
case DISCOVER:
return "DISCOVER";
case ENROUTE:
return "ENROUTE";
case JCB:
return "JCB";
default:
$this->errno = CC_ECANTYPE;
return NULL;
}
}
/*
* getCardNumber
* returns card number, only digits
*/
function getCardNumber()
{
if(!$this->number)
{
$this->errno = CC_ECALL;
return 0;
}
return $this->number;
}
/*
* errno method
* return error number
*/
function errno()
{
return $this->errno;
}
/*
* mod10 method - Luhn check digit algorithm
* return 0 if true and !0 if false
*/
function mod10($cardnum)
{
for($sum=0, $i=strlen($cardnum)-1; $i >= 0; $i--)
{
$sum += $cardnum[$i];
$doubdigit = "".(2 * $cardnum[--$i]);
for($j = strlen($doubdigit)-1; $j >= 0; $j--)
$sum += $doubdigit[$j];
}
return $sum % 10;
}
/*
* resetCard method
* clear only cards information
*/
function resetCard()
{
$this->number = 0;
$this->type = 0;
}
/*
* strError method
* return string error
*/
function strError()
{
switch($this->errno)
{
case CC_ECALL:
return "Invalid call for this method";
case CC_ETYPE:
return "Invalid card type";
case CC_ENUMBER:
return "Invalid card number";
case CC_EFORMAT:
return "Invalid format";
case CC_ECANTYPE:
return "Cannot detect the type of your card";
case CC_OK:
return "Success";
}
}
/*
* _strtonum private method
* return formated string - only digits
*/
function _strtonum($string)
{
for($i=0; $i< strlen($string); $i++)
{
if(!is_numeric($string[$i]))
continue;
$nstr = "$nstr".$string[$i];
}
return $nstr;
}
} /* ! class */
} /* ! PHP_CREDITCARD_CLASS */
?>
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