how to validate credit card number and Card Code Verification (ccv)

[LansoirThemos]

i am using authorize.net {aim} for payment gate way.

I have used http://www.johnconde.net/blog/tutorial-integrating-the-authorizenet-aim-api-with-php/  developerbook class and successfuly working without error.

But my client need to validate the ccv [Card Code Verification].

Can anyone please help with this.

I am using test authorize for developer account.

Thank You

[Virginiaes]

Turn your card over and look at the signature box. You should see either the entire 16-digit credit card number or just the last four digits followed by a special 3-digit code. This 3-digit code is your CVV number / Card Security Code. PrepaidGiftBalance