Luhn Algorithm Validator / Credit Card Type Checker
"Implement the Luhn algorithm to validate a credit card number. Bonus points if you can identify what brand of credit card the user inputted!"
via Cassidy William's Newsletter from August 6, 2023
Install Dependencies
composer install
Test Coverage
composer test
References:
Luhn Algorithm:
https://en.wikipedia.org/wiki/Luhn_algorithm
Regex for Checking Card Type:
https://stackoverflow.com/questions/72768/how-do-you-detect-credit-card-type-based-on-number/72801#72801