[PHP] QUESTION: how to validate credit card number before sent to Versign?

We collect credit card info. on our site and send it to Verisign for processing. We collect the credit card info. on the last page of our registration form. We have about 50% of the credit card numbers declined because people use dashes in their cc number (even though our directions ask them not

Re: [PHP] QUESTION: how to validate credit card number before sent to Versign?

to validate credit card number before sent to Versign? > We collect credit card info. on our site and send it to Verisign for > processing. We collect the credit card info. on the last page of our > registration form. We have about 50% of the credit card numbers declined > because pe