Edit post my 23 April 2021 Credit card validation script in PHP Credit Card Valid." : "Credit Card Invalid, Please check again..!!"; } ?> American Express Diner's Club Discover Master Card Visa Submit Some sample card number American Express: 340000000000009 Discover: 6011000000000004 Diners Club: 38520000023237 MasterCard: 5500000000000004 Visa: 4111111111111111 facebook twitter pinterest whatsapp reddit linkedin reactions