Question: Create a PHP class that validates credit card numbers. The class must validate Visa, MasterCard and American Express card numbers. The class does not need

Create a PHP class that validates credit card numbers. The class must validate Visa, MasterCard and American Express card numbers. The class does not need to determine if the account is valid and activeit simply needs to verify that the number is a valid credit card number, based on industry standard credit card numbering schemes.

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