必要に迫られて探してみた。

GitHub – inacho/php-credit-card-validator: Validates popular debit and credit cards numbers against regular expressions and Luhn algorithm. Also validates the CVC and the expiration date.
https://github.com/inacho/php-credit-card-validator

GitHub – rap2hpoutre/laravel-credit-card-validator: Laravel Credit Card Validator
https://github.com/rap2hpoutre/laravel-credit-card-validator

GitHub – Intervention/validation: Extension for the Laravel validation class
https://github.com/Intervention/validation