darkfreaks Posted February 23, 2011 Share Posted February 23, 2011 nevermind figured it out! Quote Link to comment https://forums.phpfreaks.com/topic/228568-cc-class-validation-help/ Share on other sites More sharing options...
darkfreaks Posted February 23, 2011 Author Share Posted February 23, 2011 ok i have this class i want to modify it so when i run it on another page it will stop the thank you email from being sent. cc_class.php <?php /*============================================================================== This routine checks the credit card number. The following checks are made: 1. A number has been provided 2. The number is a right length for the card 3. The number has an appropriate prefix for the card 4. The number has a valid modulus 10 number check digit if required If the validation fails an error is reported. The structure of credit card formats was gleaned from a variety of sources on the web, although the best is probably on Wikepedia ("Credit card number"): http://en.wikipedia.org/wiki/Credit_card_number Input parameters: cardnumber number on the card cardname name of card as defined in the card list below Output parameters: cardnumber number on the card cardname name of card as defined in the card list below Author: John Gardner Date: 4th January 2005 Updated: 26th February 2005 additional credit cards added 1st July 2006 multiple definition of Discovery card removed 27th Nov. 2006 Additional cards added from Wikipedia 8th Dec 2007 Problem with Solo card definition corrected 18th Jan 2008 Support for 18 digit Maestro cards added 26th Nov 2008 Support for 19 digit Maestro cards added 19th June 2009 Support for Laser debit cards if (isset($_GET['submitted'])) { if (checkCreditCard ($_GET['CardNumber'], $_GET['CardType'], $ccerror, $ccerrortext)) { $ccerrortext = 'This card has a valid format'; } } ==============================================================================*/ function checkCreditCard ($cardnumber, $cardname, &$errornumber, &$errortext) { // Define the cards we support. You may add additional card types. // Name: As in the selection box of the form - must be same as user's // Length: List of possible valid lengths of the card number for the card // prefixes: List of possible prefixes for the card // checkdigit Boolean to say whether there is a check digit // Don't forget - all but the last array definition needs a comma separator! $cards = array ( array ('name' => 'American Express', 'length' => '15', 'prefixes' => '34,37', 'checkdigit' => true ), array ('name' => 'Discover', 'length' => '16', 'prefixes' => '6011,622,64,65', 'checkdigit' => true ), array ('name' => 'JCB', 'length' => '16', 'prefixes' => '35', 'checkdigit' => true ), array ('name' => 'MasterCard', 'length' => '16', 'prefixes' => '51,52,53,54,55', 'checkdigit' => true ), array ('name' => 'Visa', 'length' => '13,16', 'prefixes' => '4', 'checkdigit' => true ), array ('name' => 'Visa Electron', 'length' => '16', 'prefixes' => '417500,4917,4913,4508,4844', 'checkdigit' => true ), ); $ccErrorNo = 0; $ccErrors [0] = "Unknown card type"; $ccErrors [1] = "No card number provided"; $ccErrors [2] = "Credit card number has invalid format"; $ccErrors [3] = "Credit card number is invalid"; $ccErrors [4] = "Credit card number is wrong length"; // Establish card type $cardType = -1; for ($i=0; $i<sizeof($cards); $i++) { // See if it is this card (ignoring the case of the string) if (strtolower($cardname) == strtolower($cards[$i]['name'])) { $cardType = $i; break; } } // If card type not found, report an error if ($cardType == -1) { $errornumber = 0; $errortext = $ccErrors [$errornumber]; return false; } // Ensure that the user has provided a credit card number if (strlen($cardnumber) == 0) { $errornumber = 1; $errortext = $ccErrors [$errornumber]; return false; } // Remove any spaces from the credit card number $cardNo = str_replace (' ', '', $cardnumber); // Check that the number is numeric and of the right sort of length. if (!eregi('^[0-9]{13,19}$',$cardNo)) { $errornumber = 2; $errortext = $ccErrors [$errornumber]; return false; } // Now check the modulus 10 check digit - if required if ($cards[$cardType]['checkdigit']) { $checksum = 0; // running checksum total $mychar = ""; // next char to process $j = 1; // takes value of 1 or 2 // Process each digit one by one starting at the right for ($i = strlen($cardNo) - 1; $i >= 0; $i--) { // Extract the next digit and multiply by 1 or 2 on alternative digits. $calc = $cardNo{$i} * $j; // If the result is in two digits add 1 to the checksum total if ($calc > 9) { $checksum = $checksum + 1; $calc = $calc - 10; } // Add the units element to the checksum total $checksum = $checksum + $calc; // Switch the value of j if ($j ==1) {$j = 2;} else {$j = 1;}; } // All done - if checksum is divisible by 10, it is a valid modulus 10. // If not, report an error. if ($checksum % 10 != 0) { $errornumber = 3; $errortext = $ccErrors [$errornumber]; return false; } } // The following are the card-specific checks we undertake. // Load an array with the valid prefixes for this card $prefix = split(',',$cards[$cardType]['prefixes']); // Now see if any of them match what we have in the card number $PrefixValid = false; for ($i=0; $i<sizeof($prefix); $i++) { $exp = '^' . $prefix[$i]; if (ereg($exp,$cardNo)) { $PrefixValid = true; break; } } // If it isn't a valid prefix there's no point at looking at the length if (!$PrefixValid) { $errornumber = 3; $errortext = $ccErrors [$errornumber]; return false; } // See if the length is valid for this card $LengthValid = false; $lengths = split(',',$cards[$cardType]['length']); for ($j=0; $j<sizeof($lengths); $j++) { if (strlen($cardNo) == $lengths[$j]) { $LengthValid = true; break; } } // See if all is OK by seeing if the length was valid. if (!$LengthValid) { $errornumber = 4; $errortext = $ccErrors [$errornumber]; return false; }; // The credit card is in the required format. return true; can someone tell me how to use this class/function to stop emails from being sent if it is an invalid card type? 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