839 error validating cardaccount number checksum

20-Jan-2016 08:35

Next, you do the same thing with the digits skipped in the first step, but this time you double the value of each digit and add the value of each digit in the result.Finally, you add both totals together and if the result is evenly divisible by 10, then the card has passed validation.Having abilities to charge someone’s credit card give you a whole new set of responsibilities.In a nutshell you may responsible for each and every transaction or transaction attempt which customers make.In PHP we can use mod10 algorithm AKA Luhn algorithm to validate Credit card number using PHP.This algorithm was invented by IBM scientist Peter Luhn in mid 90s.

As before, this routine assumes all non-digit characters have been removed from the credit card number string.However it is up to you to decide whether you need to validate the credit card number prior to submit to the payment gateway, Besides payment gateway will always validate credit card numbers in every possible ways.You can read more about Luhn algorithm in this wiki article. Lakshan Jayasinghe Lakshan is a passionate blogger and a geek! He is graduated from University of Colombo, School of Computing.Listing 2: Removing all non-digit characters from a credit card number.You will also be able to reduce bandwidth if you can avoid trying to submit a card that is not supported by the business.

As before, this routine assumes all non-digit characters have been removed from the credit card number string.

However it is up to you to decide whether you need to validate the credit card number prior to submit to the payment gateway, Besides payment gateway will always validate credit card numbers in every possible ways.

You can read more about Luhn algorithm in this wiki article. Lakshan Jayasinghe Lakshan is a passionate blogger and a geek! He is graduated from University of Colombo, School of Computing.

Listing 2: Removing all non-digit characters from a credit card number.

You will also be able to reduce bandwidth if you can avoid trying to submit a card that is not supported by the business.

In the credit card number pattern validation process, the main concern is crosscheck the given number against the pattern of available credit card types. For an example, The most important step in Validate Credit Card Number Using PHP is the checksum validation.