Validating credit card dating connecticut
Additionally, by having access to the current card type, you can better manage the state of your credit card form as a whole.
The question is that how to validate the expiration date which is often a required part in a payment form.
American Express :- Starting with 34 or 37, length 15 digits. Master Card :- Starting with 51 through 55, length 16 digits.
Discover :- Starting with 6011, length 16 digits or starting with 5, length 15 digits.
FYI, various credit cards are available in the world.
The check digit (x) is obtained by computing the sum of the non-check digits then computing 9 times that value modulo 10 (in equation form, ((67 × 9) mod 10)).
If the included checksum matches the calculated checksum, then the number is valid.
Most credit cards and many government identification numbers use the algorithm as a simple method of distinguishing valid numbers from mistyped or otherwise incorrect numbers.
The sum of all the digits in the third row is 67 x.
Credit card numbers are generated according to a specific set of rules.
This gives merchants a way to verify the validity of a card number prior to accepting the customer's payment.