credit-card

Can credit card type be determined solely from the credit card number? Is this recommended or should we always ask client for the type of credit card they're using? I Googled about it and found this algorithm: http://cuinl.tripod.com/Tips/o-1.htm , is this reliable? Yes, the site you mentioned is correct. Many sites, incl. Google Checkout I believe, rely on automatic detection of the card type. It's convenient, makes the UI less cluttered (one less input box) and saves time. Go ahead! I have heard one good reason to make them pick (even though you can figure it out). So that they know the list

Our web app needs to be made PCI compliant, i.e. it must not store any credit card numbers. The app is a frontend to a mainframe system which handles the CC numbers internally and - as we have just found out - occasionally still spits out a full CC number on one of its response screens. By default, the whole content of these responses are logged at debug level, and also the content parsed from these can be logged in lots of different places. So I can't hunt down the source of such data leaks. I must make sure that CC numbers are masked in our log files. The regex part is not an issue, I will

I have a business requirement that forces me to store a customer's full credit card details (number, name, expiry date, CVV2) for a short period of time. Rationale: If a customer calls to order a product and their credit card is declined on the spot you are likely to lose the sale. If you take their details, thank them for the transaction and then find that the card is declined, you can phone them back and they are more likely to find another way of paying for the product. If the credit card is accepted you clear the details from the order. I cannot change this. The existing system stores the

I want to format a UITextField for entering a credit card number into such that it only allows digits to be entered and automatically inserts spaces so that the number is formatted like so: XXXX XXXX XXXX XXXX How can I do this? If you're using Swift, go read my port of this answer for Swift 4 and use that instead. If you're in Objective-C... Firstly, to your UITextFieldDelegate , add these instance variables... NSString *previousTextFieldContent; UITextRange *previousSelection; ... and these methods: // Version 1.3 // Source and explanation: http://stackoverflow.com/a/19161529/1709587 -(void