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credit_card_validation.php
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credit_card_validation.php
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<?php
function validateCC($cc_num, $type) {
if($type == "American") {
$denum = "American Express";
} elseif($type == "Dinners") {
$denum = "Diner's Club";
} elseif($type == "Discover") {
$denum = "Discover";
} elseif($type == "Master") {
$denum = "Master Card";
} elseif($type == "Visa") {
$denum = "Visa";
}
if($type == "American") {
$pattern = "/^([34|37]{2})([0-9]{13})$/";//American Express
if (preg_match($pattern,$cc_num)) {
$verified = true;
} else {
$verified = false;
}
} elseif($type == "Dinners") {
$pattern = "/^([30|36|38]{2})([0-9]{12})$/";//Diner's Club
if (preg_match($pattern,$cc_num)) {
$verified = true;
} else {
$verified = false;
}
} elseif($type == "Discover") {
$pattern = "/^([6011]{4})([0-9]{12})$/";//Discover Card
if (preg_match($pattern,$cc_num)) {
$verified = true;
} else {
$verified = false;
}
} elseif($type == "Master") {
$pattern = "/^([51|52|53|54|55]{2})([0-9]{14})$/";//Mastercard
if (preg_match($pattern,$cc_num)) {
$verified = true;
} else {
$verified = false;
}
} elseif($type == "Visa") {
$pattern = "/^([4]{1})([0-9]{12,15})$/";//Visa
if (preg_match($pattern,$cc_num)) {
$verified = true;
} else {
$verified = false;
}
}
if($verified == false) {
//Do something here in case the validation fails
echo "Credit card invalid. Please make sure that you entered a valid <em>" . $denum . "</em> credit card ";
} else { // pass
echo "Your <em>" . $denum . "</em> credit card is valid";
}
}
// use a html dropdown for users to select the credit card type
echo validateCC("4111111111111111", "Visa");