PHP随机生成信用卡卡号的方法

本文实例讲述了php随机生成信用卡卡号的方法。分享给大家供大家参考。具体分析如下：

这段php代码根据信用卡卡号产生规则随机生成信用卡卡号，是可以通过验证的，仅供学习参考，请不要用于非法用途，否则后果自负。

<?php
/*
php credit card number generator
copyright (c) 2006 graham king [e-mail]
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., 51 franklin street, fifth floor, boston, ma 02110-1301, usa.
*/
$visaprefixlist[] = "4539";
$visaprefixlist[] = "4556";
$visaprefixlist[] = "4916";
$visaprefixlist[] = "4532";
$visaprefixlist[] = "4929";
$visaprefixlist[] = "40240071";
$visaprefixlist[] = "4485";
$visaprefixlist[] = "4716";
$visaprefixlist[] = "4";
$mastercardprefixlist[] = "51";
$mastercardprefixlist[] = "52";
$mastercardprefixlist[] = "53";
$mastercardprefixlist[] = "54";
$mastercardprefixlist[] = "55";
$amexprefixlist[] = "34";
$amexprefixlist[] = "37";
$discoverprefixlist[] = "6011";
$dinersprefixlist[] = "300";
$dinersprefixlist[] = "301";
$dinersprefixlist[] = "302";
$dinersprefixlist[] = "303";
$dinersprefixlist[] = "36";
$dinersprefixlist[] = "38";
$enrouteprefixlist[] = "2014";
$enrouteprefixlist[] = "2149";
$jcbprefixlist[] = "35";
$voyagerprefixlist[] = "8699";
/*
'prefix' is the start of the cc number as a string, any number of digits.
'length' is the length of the cc number to generate. typically 13 or 16
*/
function completed_number($prefix, $length) {
  $ccnumber = $prefix;
  # generate digits
  while ( strlen($ccnumber) < ($length - 1) ) {
    $ccnumber .= rand(0,9);
  }
  # calculate sum
  $sum = 0;
  $pos = 0;
  $reversedccnumber = strrev( $ccnumber );
  while ( $pos < $length - 1 ) {
    $odd = $reversedccnumber[ $pos ] * 2;
    if ( $odd > 9 ) {
      $odd -= 9;
    }
    $sum += $odd;
    if ( $pos != ($length - 2) ) {
      $sum += $reversedccnumber[ $pos +1 ];
    }
    $pos += 2;
  }
  # calculate check digit
  $checkdigit = (( floor($sum/10) + 1) * 10 - $sum) % 10;
  $ccnumber .= $checkdigit;
  return $ccnumber;
}
function credit_card_number($prefixlist, $length, $howmany) {
  for ($i = 0; $i < $howmany; $i++) {
    $ccnumber = $prefixlist[ array_rand($prefixlist) ];
    $result[] = completed_number($ccnumber, $length);
  }
  return $result;
}
function output($title, $numbers) {
  $result[] = "<div class='creditcardnumbers'>";
  $result[] = "<h3>$title</h3>";
  $result[] = implode('<br />', $numbers);
  $result[]= '</div>';
  return implode('<br />', $result);
}
#
# main
#
echo "<div class='creditcardset'>";
$mastercard = credit_card_number($mastercardprefixlist, 16, 10);
echo output("mastercard", $mastercard);
$visa16 = credit_card_number($visaprefixlist, 16, 10);
echo output("visa 16 digit", $visa16);
echo "</div>";
echo "<div class='creditcardset'>";
$visa13 = credit_card_number($visaprefixlist, 13, 5);
echo output("visa 13 digit", $visa13);
$amex = credit_card_number($amexprefixlist, 15, 5);
echo output("american express", $amex);
echo "</div>";
# minor cards
echo "<div class='creditcardset'>";
$discover = credit_card_number($discoverprefixlist, 16, 3);
echo output("discover", $discover);
$diners = credit_card_number($dinersprefixlist, 14, 3);
echo output("diners club", $diners);
echo "</div>";
echo "<div class='creditcardset'>";
$enroute = credit_card_number($enrouteprefixlist, 15, 3);
echo output("enroute", $enroute);
$jcb = credit_card_number($jcbprefixlist, 16, 3);
echo output("jcb", $jcb);
echo "</div>";
echo "<div class='creditcardset'>";
$voyager = credit_card_number($voyagerprefixlist, 15, 3);
echo output("voyager", $voyager);
echo "</div>";
?>

希望本文所述对大家的php程序设计有所帮助。