do like:
if (credit_card::validate("123412341234"))
{
// yes correct...
} else
{
// no not correct..
}
I believe this class is from WeberDev and I believe it comes with lots of
comments showing how it works...
-elias
http://www.kameelah.org/eassoft
"Dhaval Desai" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Hi!
>
> I have the following class for checking a credit card
> type.Can anybody tell me how do I access this class. I
> mean how should I check a credit card type using this
> class..?
>
> Thank you
> DHaval Desai
>
> <?php
>
>
> class credit_card
> {
> function clean_no ($cc_no)
> {
> // Remove non-numeric characters from $cc_no
> return ereg_replace ('[^0-9]+', '', $cc_no);
> }
>
> function identify ($cc_no)
> {
> $cc_no = credit_card::clean_no ($cc_no);
>
> // Get card type based on prefix and length of
> card number
> if (ereg ('^4(.{12}|.{15})$', $cc_no))
> return 'Visa';
> if (ereg ('^5[1-5].{14}$', $cc_no))
> return 'Mastercard';
> if (ereg ('^3[47].{13}$', $cc_no))
> return 'American Express';
> if (ereg ('^3(0[0-5].{11}|[68].{12})$',
> $cc_no))
> return 'Diners Club/Carte Blanche';
> if (ereg ('^6011.{12}$', $cc_no))
> return 'Discover Card';
> if (ereg ('^(3.{15}|(2131|1800).{11})$',
> $cc_no))
> return 'JCB';
> if (ereg ('^2(014|149).{11})$', $cc_no))
> return 'enRoute';
>
> return 'unknown';
> }
>
> function validate ($cc_no)
> {
> // Reverse and clean the number
> $cc_no = strrev (credit_card::clean_no
> ($cc_no));
>
> // VALIDATION ALGORITHM
> // Loop through the number one digit at a time
>
> // Double the value of every second digit
> (starting from the right)
> // Concatenate the new values with the
> unaffected digits
> for ($ndx = 0; $ndx < strlen ($cc_no); ++$ndx)
>
> $digits .= ($ndx % 2) ? $cc_no[$ndx] * 2 :
> $cc_no[$ndx];
>
> // Add all of the single digits together
> for ($ndx = 0; $ndx < strlen ($digits);
> ++$ndx)
> $sum += $digits[$ndx];
>
> // Valid card numbers will be transformed into
> a multiple of 10
> return ($sum % 10) ? FALSE : TRUE;
> }
>
> function check ($cc_no)
> {
> $valid = credit_card::validate ($cc_no);
> $type = credit_card::identify ($cc_no);
> return array ($valid, $type, 'valid' =>
> $valid, 'type' => $type);
> }
> }
>
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