Wednesday, August 8, 2012

Regular expression that validates all credit card numbers VISA, MASTER, AMEX and DISCOVERY

 ^((4\d{3})|(5[1-5]\d{2})|(6011)|(34\d{1})|(37\d{1}))-?\d{4}-?\d{4}-?\d{4}|3[4,7][\d\s-]{15}$

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