This page is currently incomplete, but you can find information about this topic at the links below:

• cardexpirevalidate( -- The cardexpirevalidate( function checks the validity of a credit card expiration date.
• cardtype( -- The cardtype( function returns the credit card type (American Express, Visa, MasterCard or Discover).
• cardvalidate( -- The cardvalidate( function verifies that a number is a valid credit card number.
• cardvalidate -- The cardvalidate statement verifies that a number is a valid credit card number.
• obscuredigits( -- The obscuredigits( function obscures digits in a number (usually a credit card number) with Xs.

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