Here is another PHP code snippet from my library. This PHP class allows you to validate credit card information before processing it further. Doing all possible off-line checks before sending it to he credit card gateway will help you save time & money…
If the card is valid it will return cleaned & formatted card number along with the card type (Visa, Mastercard, Amex, Dinners, Discover, JCB & Maestro).
Besides regular checks, validates the card number against Mod 10 (Luhn) as well as know test card numbers…
Features
- Checks if the card number, expiration date & validation numbers are valid.
- Checks if the card is expired
- Finds & returns the card type.
- Checks against the known test card numbers.
- Validates the card number using Mod 10 algorithm.
Usage Sample
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<?php require ('mod10.php'); $CARDTYPE = $ErrArr = NULL; $cc = new CCVal($_POST["card_number"], $_POST["card_expire_month"], $_POST["card_expire_year"], $_POST["card_cvv2"]); $cstatus = $cc->IsValid(); if ($cstatus[0] == "valid") { $CARDTYPE = $cstatus[1]; $_POST["card_number"] = $cstatus[2]; $_POST["card_cvv2"] = $cstatus[3]; } else { $ErrArr = $cstatus; } ?> |
Download
- Download PHP code snippet *UPDATED FOR AMEX CVV FIX
- Code is PHP5 compatible but it should also work on PHP4 (Untested)
License
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<?php class CCVal { var $__ccType = ''; var $__ccNum = ''; var $__ccExpM = 0; var $__ccExpY = 0; var $__ccCVV = ''; function CCVal($num, $expm, $expy, $cvv) { if (!empty($num)) { $cardNumber = ereg_replace("[^0-9]", "", $num); if (!empty($cardNumber)) { $this - > __ccNum = $cardNumber; } } if (!empty($cvv)) { $cardCVV = ereg_replace("[^0-9]", "", $cvv); if (!empty($cardCVV)) { $this - > __ccCVV = $cardCVV; } } if (!is_numeric($expm) || $expm & lt; 1 || $expm & gt; 12) { $this - > __ccExpM = NULL; } else { $this - > __ccExpM = $expm; } $currentYear = date('Y'); settype($currentYear, 'integer'); $expy = $expy + 2000; if (!is_numeric($expy) || $expy & lt; $currentYear || $expy & gt; $currentYear + 15) { $this - > __ccExpY = NULL; } else { $this - > __ccExpY = $expy; } if (ereg("^5[1-5][0-9]{14}$", $this - > __ccNum)) { $this - > __ccType = MASTERCARD; } elseif (ereg("^4[0-9]{12}([0-9]{3})?$", $this - > __ccNum)) { $this - > __ccType = VISA; } elseif (ereg("^3[47][0-9]{13}$", $this - > __ccNum)) { $this - > __ccType = AMEX; } elseif (ereg("^3(0[0-5]|[68][0-9])[0-9]{11}$", $this - > __ccNum)) { $this - > __ccType = DINNERS; } elseif (ereg("^6011[0-9]{12}$", $this - > __ccNum)) { $this - > __ccType = DISCOVER; } elseif (ereg("^(3[0-9]{4}|2131|1800)[0-9]{11}$", $this - > __ccNum)) { $this - > __ccType = JCB; } elseif (ereg("^(5[06-8]|6)[0-9]{10,17}$", $this - > __ccNum)) { $this - > __ccType = MAESTRO; } else { $this - > __ccType = UNKNOWN; } } function IsValid() { $validFormat = false; $validExp = false; $passCheck = false; $validCVV = false; $testCard = false; switch ($this - > __ccType) { case MASTERCARD: $validFormat = true; break; case VISA: $validFormat = true; break; case AMEX: $validFormat = true; break; case DISCOVER: $validFormat = true; break; case DINNERS: $validFormat = true; break; case JCB: $validFormat = true; break; case MAESTRO: $validFormat = true; break; default: $validFormat = false; } $cardExpM = $this - > __ccExpM; $cardExpY = $this - > __ccExpY; if ($cardExpM & amp; & amp; $cardExpY & amp; & amp; date('Ym') & lt; = $cardExpY . $cardExpM) { $validExp = true; } $cardCVV = $this - > __ccCVV; if ($cardCVV & amp; & amp; (strlen($cardCVV) == 3 & amp; & amp; $this - > __ccType != AMEX)) { $validCVV = true; } elseif ($cardCVV & amp; & amp; (strlen($cardCVV) == 4 & amp; & amp; $this - > __ccType == AMEX)) { $validCVV = true; } $cardNumber = strrev($this - > __ccNum); $numSum = 0; for ($i = 0;$i & lt;strlen($cardNumber);$i++) { $currentNum = substr($cardNumber, $i, 1); if ($i % 2 == 1) { $currentNum *= 2; } if ($currentNum & gt; 9) { $firstNum = $currentNum % 10; $secondNum = ($currentNum - $firstNum) / 10; $currentNum = $firstNum + $secondNum; } $numSum += $currentNum; } $passCheck = ($numSum % 10 == 0); $testCard = in_array($this - > __ccNum, array( '340000000000009', '341111111111111', '343434343434343', '346827630435344', '370000000000002', '370000200000000', '370407269909809', '370556019309221', '371449635398431', '374200000000004', '376462280921451', '377752749896404', '378282246310005', '378734493671000', '30000000000004', '30569309025904', '5019717010103742', '30204169322643', '30218047196557', '30221511563252', '36000000000008', '36148900647913', '36700102000000', '38000000000006', '38520000023237', '6011000000000004', '6011000000000012', '6011000400000000', '6011000990139424', '6011111111111117', '6011153216371980', '6011601160116611', '6011687482564166', '6011814836905651', '201400000000009', '201481123699422', '214925980592653', '214983972181233', '180001638277392', '180040153546898', '180058601526635', '3528000700000000', '3528723740022896', '3530111333300000', '3566002020360505', '3569990000000009', '630495060000000000', '6304900017740292441', '6333333333333333336', '5100080000000000', '5105105105105100', '5111111111111118', '5123619745395853', '5138495125550554', '5274576394259961', '5301745529138831', '5311531286000465', '5364587011785834', '5404000000000001', '5424000000000015', '5431111111111111', '5454545454545454', '5459886265631843', '5460506048039935', '5500000000000004', '5500939178004613', '5555555555554444', '5565552064481449', '5597507644910558', '6334580500000000', '6334900000000005', '633473060000000000', '6767622222222222222', '6767676767676767671', '5641820000000005', '6331101999990016', '6759649826438453', '4007000000027', '4012888818888', '4024007127653', '4222222222222', '4556069275201', '4556381812806', '4911830000000', '4916183935082', '4916603452528', '4929000000006', '4005550000000019', '4012888888881881', '4111111111111111', '4444333322221111', '4539105011539664', '4544182174537267', '4716914706534228', '4916541713757159', '4916615639346972', '4917610000000000', '4406080400000000', '4462000000000003', '4462030000000000', '4917300000000008', '4917300800000000', '4484070000000000', '4485680502719433' )); if ($validFormat & amp; & amp; $validExp & amp; & amp; $validCVV & amp; & amp; $passCheck & amp; & amp; !$testCard) { return array( "valid", $this - > __ccType, $this - > __ccNum, $this - > __ccCVV ); } else { $ERR = NULL; if (!$validFormat || !$passCheck) $ERR[] = "Invalid card number"; if (!$validCVV) $ERR[] = "Invalid CVV2/CVC2 Number"; if (!$validExp) $ERR[] = "Credit card has been expired"; if ($testCard) $ERR[] = "Reserved card number"; return $ERR; } } } ?> |