Validating credit card checks
The numbers of all credit and debit cards must comply to a complex formula called the Luhn algorithm.
The process here that offers you the ability to check the validity of any kind of credit card is a simple implementation of this algorithm.
However, Canucks president of hockey operations Trevor Linden and general manager Jim Benning did drop broad hints about what they’re looking for in a replacement for the fired Willie Desjardins.
And the clues suggest Utica Comets’ bench boss Travis Green is not only going to merit serious consideration, he probably tops the club’s wish list. Green has done an admirable job developing American Hockey League players and isn’t afraid to show tough love to prospects like Jake Virtanen.
If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware.
It's probably better NOT to validate in code at your end.The only problem with this is there is a cost for each transaction. I'm shocked that people are upvoting this garbage for 7 years .It may be small but it adds up and if someone is running a large number of fraudulent card numbers through your system the fees can become overwhelming. For example /^([34|37])([0-9])$/";//American Express will evaluate to true on a bad card number sach as 770000000000002. Diner's and Mastercard regex are also wrong along the same lines The luhn algorithm is a checksum that can used to validate the format of a lot of credit card formats (and also Canadian social insurance numbers...) The wikipedia article also links to many different implementations; here's a PHP one: Without a valid owner name, an expiration date and a valid CVV code, they can't be used for real transactions.Note that the algorithm used here is freely available across the web even