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Always consult with legal counsel and follow PCI DSS guidelines when implementing payment processing systems.
Example code (safe, minimal):
A high-quality script uses a database to identify the card issuer and type (Visa, Mastercard, etc.). Visa : Starts with 4 . Mastercard : Starts with 51-55 . Amex : Starts with 34 or 37 . Discover : Starts with 6011 or 65 . 3. API-Based "Live" Checking
: This script only checks if the number is mathematically correct . It cannot tell you if the card is active, has funds, or belongs to a real person.
Always consult with legal counsel and follow PCI DSS guidelines when implementing payment processing systems.
Example code (safe, minimal):
A high-quality script uses a database to identify the card issuer and type (Visa, Mastercard, etc.). Visa : Starts with 4 . Mastercard : Starts with 51-55 . Amex : Starts with 34 or 37 . Discover : Starts with 6011 or 65 . 3. API-Based "Live" Checking
: This script only checks if the number is mathematically correct . It cannot tell you if the card is active, has funds, or belongs to a real person.
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