If you have trouble reaching us by telephone, please reach out to for business inquiries or for technical inquiries.
Our telephones have not been reliable lately. Apparently, AT&T is having difficulty supporting copper-based plain old telephone service (POTS) lines and they don't seem to be very interested in that legacy business any longer. We are in the process of transitioning from AT&T POTS to VoIP telephone service, but this is taking longer than expected or desired.
We have already dropped AT&T Fiber Internet, AT&T Wireless, and AT&T Long Distance. Our transition away from AT&T will hopefully soon be complete.
In the meantime, if you have any trouble reaching us, please send us a message via one of the above email addresses and we will endeavor to get back to you quickly.
Thank you.
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(Mod 10), a simple checksum formula used to verify that a number is formatted correctly. Implementation
A robust PHP script should go beyond simple digit counting. The "best" versions typically include: cc checker script php best
$sum += $digit;
The following open-source tools are widely used for local validation of card numbers, CVCs, and expiration dates. inacho/php-credit-card-validator
. For professional use, it often integrates with payment gateways like Core Functionality of a CC Checker Cleans the input by removing spaces, dashes, and
A high-quality CC checker script must possess the following characteristics:
Are you integrating this into a (like Laravel or WooCommerce)?
: Catching typos locally saves you from making unnecessary, slow, or potentially costly API calls for clearly invalid numbers. If you share with third parties, their policies apply
The Luhn algorithm (also known as the "modulus 10" algorithm) is the global standard for validating identification numbers. It catches simple typos and accidental number transpositions.
cc-checker-php is a lightweight, open-source CC checker script written in PHP. It supports multiple card types, uses the Luhn algorithm for card number validation, and checks expiration dates and security codes.