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Credit Card Validator
Script per la validazione delle carte di credito.
<?php
function CCVal($Num, $Name = 'n/a') {
$GoodCard = true;
$Num = ereg_replace("[^[:digit:]]", "", $Num);
switch ($Name) {
case "mcd" :
$GoodCard = ereg("^5[1-5].{14}$", $Num);
break;
case "vis" :
$GoodCard = ereg("^4.{15}$|^4.{12}$", $Num);
break;
case "amx" :
$GoodCard = ereg("^3[47].{13}$", $Num);
break;
case "dsc" :
$GoodCard = ereg("^6011.{12}$", $Num);
break;
case "dnc" :
$GoodCard = ereg("^30[0-5].{11}$|^3[68].{12}$", $Num);
break;
case "jcb" :
$GoodCard = ereg("^3.{15}$|^2131|1800.{11}$", $Num);
break;
}
$Num = strrev($Num);
$Total = 0;
for ($x=0; $x<strlen($Num); $x++) {
$digit = substr($Num,$x,1);
if ($x/2 != floor($x/2)) {
$digit *= 2;
if (strlen($digit) == 2)
$digit = substr($digit,0,1) + substr($digit,1,1);
}
$Total += $digit;
}
if ($GoodCard && $Total % 10 == 0) return true; else return false;
}
?>
