Credit Card Validation Script
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This script verifies whether a credit card number follows some well known rules for various card types. For example, it checks the number of digits in the card and compares the starting digits for that card against the known digits for that card type. It also uses an algorithm called the Luhn algorithm that does a kind of checksum on the card number.
Most scripts are free or open source. But some have the full source code available for download yet itīs required to have permission to use them and most often the price will be listed. If there is a script license e.g. GNU or GPL then it will also be listed. |
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