Login   Register  
PHP Classes
elePHPant
Icontem

File: creditcard_class.php

Recommend this page to a friend!
Stumble It! Stumble It! Bookmark in del.icio.us Bookmark in del.icio.us
  Classes of Daniel Froz Costa  >  CreditCard Class  >  creditcard_class.php  >  Download  
File: creditcard_class.php
Role: Class source
Content type: text/plain
Description: Class file
Class: CreditCard Class
Validate credit cards and detect the type of card
Author: By
Last change:
Date: 12 years ago
Size: 6,452 bytes
 

Contents

Class file image Download
<?
/*
 * 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_CLASS1);

define(UNKNOWN0);
define(MASTERCARD1);
define(VISA2);
define(AMEX3);
define(DINNERS4);
define(DISCOVER5);
define(ENROUTE6);
define(JCB7);

define(CC_OK0);
define(CC_ECALL1);
define(CC_EARG2);
define(CC_ETYPE3);
define(CC_ENUMBER4);
define(CC_EFORMAT5);
define(CC_ECANTYPE6);

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];
      
$doubdigit "".($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(
$i=0$istrlen($string); $i++)
    {
      if(!
is_numeric($string[$i]))
        continue;
      
$nstr "$nstr".$string[$i];
    }
    return 
$nstr;
  }

/* ! class */


/* ! PHP_CREDITCARD_CLASS */

?>