Switch - Credit Card

[cjliu42]

Hi All,

Can anyone answer my question. I am developing a payment system, which will involve credit card payments. I have decided to use LAMP, with SSL and to send the payment details using PGP. Now, before I send the information I would like to check the credit card number is in a valid format. I have found VISA, MASTERCARD and AE algorithms, they are all very helpful. But I haven't come across an example for SWITCH that works.

Somone posted the following example, but no luck:

^{([0-9]{6}[\s-]{1}[0-9]{12}|[0-9]{18})$}

Does an algorithm exist? Can anyone please point me to the right direction? I do not want to download any software or have to pay for any commercial solutions if possible and I am flexible about using PHP or JavaScript.

Thanks...

Colin

[superwormy]

Not sure if this is what you're looking for... but Luhn Formula ( or Mod10 ) is the formula used to validate credit card numbers:

http://www.webopedia.com/TERM/L/Luhn_formula.html

Its worked for every credti card I can think of at the moment, Discover, AX, Mastercard, Visa, Diners Club, Carte Blanch...

Hope that helps!

[cjliu42]

Thanks. I have managed to find algorithms for the majority of credit cards you mentioned, what I need is an algorithm for SWITCH / SOLO. Would anyone know?

Thanks

Colin