What is the best way to validate a credit card in PHP?

What is the best way to validate a credit card in PHP?

php validation e-commerce numbers credit-card

php

Credit card payment gateway in PHP? [closed]

php api transactions payment-gateway credit-card

php

Storing Credit Card Numbers in SESSION - ways around it?

php mysql session credit-card

php

Stripe: No such token.. a similar object exists in test mode, but a live mode key was used to make this request

php stripe-payments credit-card

php

Can I save credit card secret code in the database?

php database credit-card

php

Authorize.net CIM Duplicate Transaction Window

php payment-gateway credit-card authorize.net payment-processing

php