我需要有关此代码的帮助，是信用卡验证，我一直试图让它在我的代码中工作，但我不能，我只需要获取 2 个变量，卡是否工作它应该返回 true 工作，但是如果不是，它会显示一条错误消息，但我还需要返回 false，这是代码：
<?php
$cardnumber = $_POST['CardNumber'];
$cardname = $_POST['CardType'];
$cards = array ( array ('name' => 'American Express',
'length' => '15',
'prefixes' => '34,37',
'checkdigit' => true
),
array ('name' => 'Diners Club Carte Blanche',
'length' => '14',
'prefixes' => '300,301,302,303,304,305',
'checkdigit' => true
),
array ('name' => 'Diners Club',
'length' => '14,16',
'prefixes' => '36,38,54,55',
'checkdigit' => true
),
array ('name' => 'Discover',
'length' => '16',
'prefixes' => '6011,622,64,65',
'checkdigit' => true
),
array ('name' => 'Diners Club Enroute',
'length' => '15',
'prefixes' => '2014,2149',
'checkdigit' => true
),
array ('name' => 'JCB',
'length' => '16',
'prefixes' => '35',
'checkdigit' => true
),
array ('name' => 'Maestro',
'length' => '12,13,14,15,16,18,19',
'prefixes' => '5018,5020,5038,6304,6759,6761,6762,6763',
'checkdigit' => true
),
array ('name' => 'MasterCard',
'length' => '16',
'prefixes' => '51,52,53,54,55',
'checkdigit' => true
),
array ('name' => 'Solo',
'length' => '16,18,19',
'prefixes' => '6334,6767',
'checkdigit' => true
),
array ('name' => 'Switch',
'length' => '16,18,19',
'prefixes' => '4903,4905,4911,4936,564182,633110,6333,6759',
'checkdigit' => true
),
array ('name' => 'VISA',
'length' => '16',
'prefixes' => '4',
'checkdigit' => true
),
array ('name' => 'VISA Electron',
'length' => '16',
'prefixes' => '417500,4917,4913,4508,4844',
'checkdigit' => true
),
array ('name' => 'LaserCard',
'length' => '16,17,18,19',
'prefixes' => '6304,6706,6771,6709',
'checkdigit' => true
)
);
$ccErrorNo = 0;
$ccErrors [0] = "Unknown card type";
$ccErrors [1] = "No card number provided";
$ccErrors [2] = "Credit card number has invalid format";
$ccErrors [3] = "Credit card number is invalid";
$ccErrors [4] = "Credit card number is wrong length";
// Establish card type
$cardType = -1;
for ($i=0; $i<sizeof($cards); $i++) {
// See if it is this card (ignoring the case of the string)
if (strtolower($cardname) == strtolower($cards[$i]['name'])) {
$cardType = $i;
break;
}
}
// If card type not found, report an error
if ($cardType == -1) {
$errornumber = 0;
$errortext = $ccErrors [$errornumber];
return true;
}
// Ensure that the user has provided a credit card number
if (strlen($cardnumber) == 0) {
$errornumber = 1;
$errortext = $ccErrors [$errornumber];
return true;
}
// Remove any spaces from the credit card number
$cardNo = str_replace (' ', '', $cardnumber);
// Check that the number is numeric and of the right sort of length.
if (!preg_match("/^[0-9]{13,19}$/",$cardNo)) {
$errornumber = 2;
$errortext = $ccErrors [$errornumber];
return true;
}
// Now check the modulus 10 check digit - if required
if ($cards[$cardType]['checkdigit']) {
$checksum = 0; // running checksum total
$mychar = ""; // next char to process
$j = 1; // takes value of 1 or 2
// Process each digit one by one starting at the right
for ($i = strlen($cardNo) - 1; $i >= 0; $i--) {
// Extract the next digit and multiply by 1 or 2 on alternative digits.
$calc = $cardNo{$i} * $j;
// If the result is in two digits add 1 to the checksum total
if ($calc > 9) {
$checksum = $checksum + 1;
$calc = $calc - 10;
}
// Add the units element to the checksum total
$checksum = $checksum + $calc;
// Switch the value of j
if ($j ==1) {$j = 2;} else {$j = 1;};
}
// All done - if checksum is divisible by 10, it is a valid modulus 10.
// If not, report an error.
if ($checksum % 10 != 0) {
$errornumber = 3;
$errortext = $ccErrors [$errornumber];
return true;
}
}
// The following are the card-specific checks we undertake.
// Load an array with the valid prefixes for this card
$prefix = explode(',',$cards[$cardType]['prefixes']);
// Now see if any of them match what we have in the card number
$PrefixValid = false;
for ($i=0; $i<sizeof($prefix); $i++) {
$exp = '/^' . $prefix[$i] . '/';
if (preg_match($exp,$cardNo)) {
$PrefixValid = true;
break;
}
}
// If it isn't a valid prefix there's no point at looking at the length
if (!$PrefixValid) {
$errornumber = 3;
$errortext = $ccErrors [$errornumber];
return true;
}
// See if the length is valid for this card
$LengthValid = false;
$lengths = explode(',',$cards[$cardType]['length']);
for ($j=0; $j<sizeof($lengths); $j++) {
if (strlen($cardNo) == $lengths[$j]) {
$LengthValid = true;
break;
}
}
// See if all is OK by seeing if the length was valid.
if (!$LengthValid) {
$errornumber = 4;
$errortext = $ccErrors [$errornumber];
return true;
};
// The credit card is in the required format.
return true;
echo $errortext;
?>
您可以看到返回 true，但我还需要在卡未验证时将其更改为 false，以便我可以进行其他验证，感谢您的帮助。
我发现其他代码可以满足我的需要，更简单一点，可以将这个新代码的 $verified 变量添加到第一个代码中吗？这是代码：
<?php
$cc_number = $_POST['CardNumber'];
$type = $_POST['CardType'];
$cc_num = str_replace (' ', '', $cc_number);
if($type == "AX") {
$denum = "American Express";
} elseif($type == "DC") {
$denum = "Diner's Club";
} elseif($type == "DS") {
$denum = "Discover";
} elseif($type == "MC") {
$denum = "Master Card";
} elseif($type == "VI") {
$denum = "Visa";
}
if($type == "AX") {
$pattern = "/^([34|37]{2})([0-9]{13})$/";//American Express
if (preg_match($pattern,$cc_num)) {
$verified = true;
} else {
$verified = false;
}
} elseif($type == "DC") {
$pattern = "/^([30|36|38]{2})([0-9]{12})$/";//Diner's Club
if (preg_match($pattern,$cc_num)) {
$verified = true;
} else {
$verified = false;
}
} elseif($type == "DS") {
$pattern = "/^([6011]{4})([0-9]{12})$/";//Discover Card
if (preg_match($pattern,$cc_num)) {
$verified = true;
} else {
$verified = false;
}
} elseif($type == "MC") {
$pattern = "/^([51|52|53|54|55]{2})([0-9]{14})$/";//Mastercard
if (preg_match($pattern,$cc_num)) {
$verified = true;
} else {
$verified = false;
}
} elseif($type == "VI") {
$pattern = "/^([4]{1})([0-9]{12,15})$/";//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 { //if it will pass...do something
echo "Your <em>" . $denum . "</em> credit card is valid";
}
?>