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Regex para identificar bandeiras do cartão de crédito
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| Amex: /^3[47][0-9]{13}/ | |
| Diners Club: /^3(?:0[0-5]|[68][0-9])[0-9]{11}/ | |
| Visa: /^4[0-9]{12}(?:[0-9]{3})/ | |
| Mastercard: /^5[1-5][0-9]{14}/ | |
| Discover: /^6(?:011|5[0-9]{2})[0-9]{12}/ | |
| Hipercard: /^(606282\d{10}(\d{3})?)|(3841\d{15})/ | |
| Elo: /^((((636368)|(438935)|(504175)|(451416)|(636297))\d{0,10})|((5067)|(4576)|(4011))\d{0,12})/ | |
| JCB: /^(?:2131|1800|35\d{3})\d{11}/ |
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