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August 1, 2011 06:36
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Valid
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| <?php | |
| class Valid { | |
| public static function password($pass) { | |
| return strlen($pass) > 3; | |
| } | |
| public static function username($username) { | |
| if(strlen($username) < 3 || strlen($username) > 30 ) { | |
| return false; | |
| } | |
| if(preg_match('/[^A-Za-z0-9_-]/', $username)) { | |
| return false; | |
| } | |
| return true; | |
| } | |
| /** | |
| * @package isemail | |
| * @author Dominic Sayers <dominic_sayers@hotmail.com> | |
| * @copyright 2009 Dominic Sayers | |
| * @license http://www.opensource.org/licenses/bsd-license.php BSD License | |
| * @link http://www.dominicsayers.com/isemail | |
| * @version 1.16 - Added optional diagnosis codes (amended all lines with a return statement) | |
| */ | |
| /* | |
| Copyright (c) 2008-2010, Dominic Sayers | |
| All rights reserved. | |
| Redistribution and use in source and binary forms, with or without modification, | |
| are permitted provided that the following conditions are met: | |
| * Redistributions of source code must retain the above copyright notice, this | |
| list of conditions and the following disclaimer. | |
| * Redistributions in binary form must reproduce the above copyright notice, | |
| this list of conditions and the following disclaimer in the documentation | |
| and/or other materials provided with the distribution. | |
| * Neither the name of Dominic Sayers nor the names of its contributors may be | |
| used to endorse or promote products derived from this software without | |
| specific prior written permission. | |
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND | |
| ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
| WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
| DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR | |
| ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
| (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON | |
| ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
| SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| */ | |
| public static function email($email, $checkDNS = false, $diagnose = false) { | |
| if (!defined('ISEMAIL_VALID')) { | |
| define('ISEMAIL_VALID' , 0); | |
| define('ISEMAIL_TOOLONG' , 1); | |
| define('ISEMAIL_NOAT' , 2); | |
| define('ISEMAIL_NOLOCALPART' , 3); | |
| define('ISEMAIL_NODOMAIN' , 4); | |
| define('ISEMAIL_ZEROLENGTHELEMENT' , 5); | |
| define('ISEMAIL_BADCOMMENT_START' , 6); | |
| define('ISEMAIL_BADCOMMENT_END' , 7); | |
| define('ISEMAIL_UNESCAPEDDELIM' , 8); | |
| define('ISEMAIL_EMPTYELEMENT' , 9); | |
| define('ISEMAIL_UNESCAPEDSPECIAL' , 10); | |
| define('ISEMAIL_LOCALTOOLONG' , 11); | |
| define('ISEMAIL_IPV4BADPREFIX' , 12); | |
| define('ISEMAIL_IPV6BADPREFIXMIXED' , 13); | |
| define('ISEMAIL_IPV6BADPREFIX' , 14); | |
| define('ISEMAIL_IPV6GROUPCOUNT' , 15); | |
| define('ISEMAIL_IPV6DOUBLEDOUBLECOLON' , 16); | |
| define('ISEMAIL_IPV6BADCHAR' , 17); | |
| define('ISEMAIL_IPV6TOOMANYGROUPS' , 18); | |
| define('ISEMAIL_TLD' , 19); | |
| define('ISEMAIL_DOMAINEMPTYELEMENT' , 20); | |
| define('ISEMAIL_DOMAINELEMENTTOOLONG' , 21); | |
| define('ISEMAIL_DOMAINBADCHAR' , 22); | |
| define('ISEMAIL_DOMAINTOOLONG' , 23); | |
| define('ISEMAIL_TLDNUMERIC' , 24); | |
| define('ISEMAIL_DOMAINNOTFOUND' , 25); | |
| define('ISEMAIL_NOTDEFINED' , 99); | |
| } | |
| // the upper limit on address lengths should normally be considered to be 256 | |
| // (http://www.rfc-editor.org/errata_search.php?rfc=3696) | |
| // NB I think John Klensin is misreading RFC 5321 and the the limit should actually be 254 | |
| // However, I will stick to the published number until it is changed. | |
| // | |
| // The maximum total length of a reverse-path or forward-path is 256 | |
| // characters (including the punctuation and element separators) | |
| // (http://tools.ietf.org/html/rfc5321#section-4.5.3.1.3) | |
| $emailLength = strlen($email); | |
| if ($emailLength > 256) return $diagnose ? ISEMAIL_TOOLONG : false; // Too long | |
| // Contemporary email addresses consist of a "local part" separated from | |
| // a "domain part" (a fully-qualified domain name) by an at-sign ("@"). | |
| // (http://tools.ietf.org/html/rfc3696#section-3) | |
| $atIndex = strrpos($email,'@'); | |
| if ($atIndex === false) return $diagnose ? ISEMAIL_NOAT : false; // No at-sign | |
| if ($atIndex === 0) return $diagnose ? ISEMAIL_NOLOCALPART : false; // No local part | |
| if ($atIndex === $emailLength - 1) return $diagnose ? ISEMAIL_NODOMAIN : false; // No domain part | |
| // revision 1.14: Length test bug suggested by Andrew Campbell of Gloucester, MA | |
| // Sanitize comments | |
| // - remove nested comments, quotes and dots in comments | |
| // - remove parentheses and dots from quoted strings | |
| $braceDepth = 0; | |
| $inQuote = false; | |
| $escapeThisChar = false; | |
| for ($i = 0; $i < $emailLength; ++$i) { | |
| $char = $email[$i]; | |
| $replaceChar = false; | |
| if ($char === '\\') { | |
| $escapeThisChar = !$escapeThisChar; // Escape the next character? | |
| } else { | |
| switch ($char) { | |
| case '(': | |
| if ($escapeThisChar) { | |
| $replaceChar = true; | |
| } else { | |
| if ($inQuote) { | |
| $replaceChar = true; | |
| } else { | |
| if ($braceDepth++ > 0) $replaceChar = true; // Increment brace depth | |
| } | |
| } | |
| break; | |
| case ')': | |
| if ($escapeThisChar) { | |
| $replaceChar = true; | |
| } else { | |
| if ($inQuote) { | |
| $replaceChar = true; | |
| } else { | |
| if (--$braceDepth > 0) $replaceChar = true; // Decrement brace depth | |
| if ($braceDepth < 0) $braceDepth = 0; | |
| } | |
| } | |
| break; | |
| case '"': | |
| if ($escapeThisChar) { | |
| $replaceChar = true; | |
| } else { | |
| if ($braceDepth === 0) { | |
| $inQuote = !$inQuote; // Are we inside a quoted string? | |
| } else { | |
| $replaceChar = true; | |
| } | |
| } | |
| break; | |
| case '.': // Dots don't help us either | |
| if ($escapeThisChar) { | |
| $replaceChar = true; | |
| } else { | |
| if ($braceDepth > 0) $replaceChar = true; | |
| } | |
| break; | |
| default: | |
| } | |
| $escapeThisChar = false; | |
| // if ($replaceChar) $email[$i] = 'x'; // Replace the offending character with something harmless | |
| // revision 1.12: Line above replaced because PHPLint doesn't like that syntax | |
| if ($replaceChar) $email = (string) substr_replace($email, 'x', $i, 1); // Replace the offending character with something harmless | |
| } | |
| } | |
| $localPart = substr($email, 0, $atIndex); | |
| $domain = substr($email, $atIndex + 1); | |
| $FWS = "(?:(?:(?:[ \\t]*(?:\\r\\n))?[ \\t]+)|(?:[ \\t]+(?:(?:\\r\\n)[ \\t]+)*))"; // Folding white space | |
| // Let's check the local part for RFC compliance... | |
| // | |
| // local-part = dot-atom / quoted-string / obs-local-part | |
| // obs-local-part = word *("." word) | |
| // (http://tools.ietf.org/html/rfc5322#section-3.4.1) | |
| // | |
| // Problem: need to distinguish between "first.last" and "first"."last" | |
| // (i.e. one element or two). And I suck at regexes. | |
| $dotArray = /*. (array[int]string) .*/ preg_split('/\\.(?=(?:[^\\"]*\\"[^\\"]*\\")*(?![^\\"]*\\"))/m', $localPart); | |
| $partLength = 0; | |
| foreach ($dotArray as $element) { | |
| // Remove any leading or trailing FWS | |
| $element = preg_replace("/^$FWS|$FWS\$/", '', $element); | |
| $elementLength = strlen($element); | |
| if ($elementLength === 0) return $diagnose ? ISEMAIL_ZEROLENGTHELEMENT : false; // Can't have empty element (consecutive dots or dots at the start or end) | |
| // revision 1.15: Speed up the test and get rid of "unitialized string offset" notices from PHP | |
| // We need to remove any valid comments (i.e. those at the start or end of the element) | |
| if ($element[0] === '(') { | |
| $indexBrace = strpos($element, ')'); | |
| if ($indexBrace !== false) { | |
| if (preg_match('/(?<!\\\\)[\\(\\)]/', substr($element, 1, $indexBrace - 1)) > 0) { | |
| return $diagnose ? ISEMAIL_BADCOMMENT_START : false; // Illegal characters in comment | |
| } | |
| $element = substr($element, $indexBrace + 1, $elementLength - $indexBrace - 1); | |
| $elementLength = strlen($element); | |
| } | |
| } | |
| if ($element[$elementLength - 1] === ')') { | |
| $indexBrace = strrpos($element, '('); | |
| if ($indexBrace !== false) { | |
| if (preg_match('/(?<!\\\\)(?:[\\(\\)])/', substr($element, $indexBrace + 1, $elementLength - $indexBrace - 2)) > 0) { | |
| return $diagnose ? ISEMAIL_BADCOMMENT_END : false; // Illegal characters in comment | |
| } | |
| $element = substr($element, 0, $indexBrace); | |
| $elementLength = strlen($element); | |
| } | |
| } | |
| // Remove any leading or trailing FWS around the element (inside any comments) | |
| $element = preg_replace("/^$FWS|$FWS\$/", '', $element); | |
| // What's left counts towards the maximum length for this part | |
| if ($partLength > 0) $partLength++; // for the dot | |
| $partLength += strlen($element); | |
| // Each dot-delimited component can be an atom or a quoted string | |
| // (because of the obs-local-part provision) | |
| if (preg_match('/^"(?:.)*"$/s', $element) > 0) { | |
| // Quoted-string tests: | |
| // | |
| // Remove any FWS | |
| $element = preg_replace("/(?<!\\\\)$FWS/", '', $element); | |
| // My regex skillz aren't up to distinguishing between \" \\" \\\" \\\\" etc. | |
| // So remove all \\ from the string first... | |
| $element = preg_replace('/\\\\\\\\/', ' ', $element); | |
| if (preg_match('/(?<!\\\\|^)["\\r\\n\\x00](?!$)|\\\\"$|""/', $element) > 0) return $diagnose ? ISEMAIL_UNESCAPEDDELIM : false; // ", CR, LF and NUL must be escaped, "" is too short | |
| } else { | |
| // Unquoted string tests: | |
| // | |
| // Period (".") may...appear, but may not be used to start or end the | |
| // local part, nor may two or more consecutive periods appear. | |
| // (http://tools.ietf.org/html/rfc3696#section-3) | |
| // | |
| // A zero-length element implies a period at the beginning or end of the | |
| // local part, or two periods together. Either way it's not allowed. | |
| if ($element === '') return $diagnose ? ISEMAIL_EMPTYELEMENT : false; // Dots in wrong place | |
| // Any ASCII graphic (printing) character other than the | |
| // at-sign ("@"), backslash, double quote, comma, or square brackets may | |
| // appear without quoting. If any of that list of excluded characters | |
| // are to appear, they must be quoted | |
| // (http://tools.ietf.org/html/rfc3696#section-3) | |
| // | |
| // Any excluded characters? i.e. 0x00-0x20, (, ), <, >, [, ], :, ;, @, \, comma, period, " | |
| if (preg_match('/[\\x00-\\x20\\(\\)<>\\[\\]:;@\\\\,\\."]/', $element) > 0) return $diagnose ? ISEMAIL_UNESCAPEDSPECIAL : false; // These characters must be in a quoted string | |
| } | |
| } | |
| if ($partLength > 64) return $diagnose ? ISEMAIL_LOCALTOOLONG : false; // Local part must be 64 characters or less | |
| // Now let's check the domain part... | |
| // The domain name can also be replaced by an IP address in square brackets | |
| // (http://tools.ietf.org/html/rfc3696#section-3) | |
| // (http://tools.ietf.org/html/rfc5321#section-4.1.3) | |
| // (http://tools.ietf.org/html/rfc4291#section-2.2) | |
| if (preg_match('/^\\[(.)+]$/', $domain) === 1) { | |
| // It's an address-literal | |
| $addressLiteral = substr($domain, 1, strlen($domain) - 2); | |
| $matchesIP = array(); | |
| // Extract IPv4 part from the end of the address-literal (if there is one) | |
| if (preg_match('/\\b(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/', $addressLiteral, $matchesIP) > 0) { | |
| $index = strrpos($addressLiteral, $matchesIP[0]); | |
| if ($index === 0) { | |
| // Nothing there except a valid IPv4 address, so... | |
| return $diagnose ? ISEMAIL_VALID : true; | |
| } else { | |
| // Assume it's an attempt at a mixed address (IPv6 + IPv4) | |
| if ($addressLiteral[$index - 1] !== ':') return $diagnose ? ISEMAIL_IPV4BADPREFIX : false; // Character preceding IPv4 address must be ':' | |
| if (substr($addressLiteral, 0, 5) !== 'IPv6:') return $diagnose ? ISEMAIL_IPV6BADPREFIXMIXED : false; // RFC5321 section 4.1.3 | |
| $IPv6 = substr($addressLiteral, 5, ($index ===7) ? 2 : $index - 6); | |
| $groupMax = 6; | |
| } | |
| } else { | |
| // It must be an attempt at pure IPv6 | |
| if (substr($addressLiteral, 0, 5) !== 'IPv6:') return $diagnose ? ISEMAIL_IPV6BADPREFIX : false; // RFC5321 section 4.1.3 | |
| $IPv6 = substr($addressLiteral, 5); | |
| $groupMax = 8; | |
| } | |
| $groupCount = preg_match_all('/^[0-9a-fA-F]{0,4}|\\:[0-9a-fA-F]{0,4}|(.)/', $IPv6, $matchesIP); | |
| $index = strpos($IPv6,'::'); | |
| if ($index === false) { | |
| // We need exactly the right number of groups | |
| if ($groupCount !== $groupMax) return $diagnose ? ISEMAIL_IPV6GROUPCOUNT : false; // RFC5321 section 4.1.3 | |
| } else { | |
| if ($index !== strrpos($IPv6,'::')) return $diagnose ? ISEMAIL_IPV6DOUBLEDOUBLECOLON : false; // More than one '::' | |
| $groupMax = ($index === 0 || $index === (strlen($IPv6) - 2)) ? $groupMax : $groupMax - 1; | |
| if ($groupCount > $groupMax) return $diagnose ? ISEMAIL_IPV6TOOMANYGROUPS : false; // Too many IPv6 groups in address | |
| } | |
| // Check for unmatched characters | |
| array_multisort($matchesIP[1], SORT_DESC); | |
| if ($matchesIP[1][0] !== '') return $diagnose ? ISEMAIL_IPV6BADCHAR : false; // Illegal characters in address | |
| // It's a valid IPv6 address, so... | |
| return $diagnose ? ISEMAIL_VALID : true; | |
| } else { | |
| // It's a domain name... | |
| // The syntax of a legal Internet host name was specified in RFC-952 | |
| // One aspect of host name syntax is hereby changed: the | |
| // restriction on the first character is relaxed to allow either a | |
| // letter or a digit. | |
| // (http://tools.ietf.org/html/rfc1123#section-2.1) | |
| // | |
| // NB RFC 1123 updates RFC 1035, but this is not currently apparent from reading RFC 1035. | |
| // | |
| // Most common applications, including email and the Web, will generally not | |
| // permit...escaped strings | |
| // (http://tools.ietf.org/html/rfc3696#section-2) | |
| // | |
| // the better strategy has now become to make the "at least one period" test, | |
| // to verify LDH conformance (including verification that the apparent TLD name | |
| // is not all-numeric) | |
| // (http://tools.ietf.org/html/rfc3696#section-2) | |
| // | |
| // Characters outside the set of alphabetic characters, digits, and hyphen MUST NOT appear in domain name | |
| // labels for SMTP clients or servers | |
| // (http://tools.ietf.org/html/rfc5321#section-4.1.2) | |
| // | |
| // RFC5321 precludes the use of a trailing dot in a domain name for SMTP purposes | |
| // (http://tools.ietf.org/html/rfc5321#section-4.1.2) | |
| $dotArray = /*. (array[int]string) .*/ preg_split('/\\.(?=(?:[^\\"]*\\"[^\\"]*\\")*(?![^\\"]*\\"))/m', $domain); | |
| $partLength = 0; | |
| $element = ''; // Since we use $element after the foreach loop let's make sure it has a value | |
| // revision 1.13: Line above added because PHPLint now checks for Definitely Assigned Variables | |
| if (count($dotArray) === 1) return $diagnose ? ISEMAIL_TLD : false; // Mail host can't be a TLD (cite? What about localhost?) | |
| foreach ($dotArray as $element) { | |
| // Remove any leading or trailing FWS | |
| $element = preg_replace("/^$FWS|$FWS\$/", '', $element); | |
| $elementLength = strlen($element); | |
| // Each dot-delimited component must be of type atext | |
| // A zero-length element implies a period at the beginning or end of the | |
| // local part, or two periods together. Either way it's not allowed. | |
| if ($elementLength === 0) return $diagnose ? ISEMAIL_DOMAINEMPTYELEMENT : false; // Dots in wrong place | |
| // revision 1.15: Speed up the test and get rid of "unitialized string offset" notices from PHP | |
| // Then we need to remove all valid comments (i.e. those at the start or end of the element | |
| if ($element[0] === '(') { | |
| $indexBrace = strpos($element, ')'); | |
| if ($indexBrace !== false) { | |
| if (preg_match('/(?<!\\\\)[\\(\\)]/', substr($element, 1, $indexBrace - 1)) > 0) { | |
| return $diagnose ? ISEMAIL_BADCOMMENTSTART : false; // Illegal characters in comment | |
| } | |
| $element = substr($element, $indexBrace + 1, $elementLength - $indexBrace - 1); | |
| $elementLength = strlen($element); | |
| } | |
| } | |
| if ($element[$elementLength - 1] === ')') { | |
| $indexBrace = strrpos($element, '('); | |
| if ($indexBrace !== false) { | |
| if (preg_match('/(?<!\\\\)(?:[\\(\\)])/', substr($element, $indexBrace + 1, $elementLength - $indexBrace - 2)) > 0) | |
| return $diagnose ? ISEMAIL_BADCOMMENTEND : false; // Illegal characters in comment | |
| $element = substr($element, 0, $indexBrace); | |
| $elementLength = strlen($element); | |
| } | |
| } | |
| // Remove any leading or trailing FWS around the element (inside any comments) | |
| $element = preg_replace("/^$FWS|$FWS\$/", '', $element); | |
| // What's left counts towards the maximum length for this part | |
| if ($partLength > 0) $partLength++; // for the dot | |
| $partLength += strlen($element); | |
| // The DNS defines domain name syntax very generally -- a | |
| // string of labels each containing up to 63 8-bit octets, | |
| // separated by dots, and with a maximum total of 255 | |
| // octets. | |
| // (http://tools.ietf.org/html/rfc1123#section-6.1.3.5) | |
| if ($elementLength > 63) return $diagnose ? ISEMAIL_DOMAINELEMENTTOOLONG : false; // Label must be 63 characters or less | |
| // Any ASCII graphic (printing) character other than the | |
| // at-sign ("@"), backslash, double quote, comma, or square brackets may | |
| // appear without quoting. If any of that list of excluded characters | |
| // are to appear, they must be quoted | |
| // (http://tools.ietf.org/html/rfc3696#section-3) | |
| // | |
| // If the hyphen is used, it is not permitted to appear at | |
| // either the beginning or end of a label. | |
| // (http://tools.ietf.org/html/rfc3696#section-2) | |
| // | |
| // Any excluded characters? i.e. 0x00-0x20, (, ), <, >, [, ], :, ;, @, \, comma, period, " | |
| if (preg_match('/[\\x00-\\x20\\(\\)<>\\[\\]:;@\\\\,\\."]|^-|-$/', $element) > 0) { | |
| return $diagnose ? ISEMAIL_DOMAINBADCHAR : false; | |
| } | |
| } | |
| if ($partLength > 255) return $diagnose ? ISEMAIL_DOMAINTOOLONG : false; // Domain part must be 255 characters or less (http://tools.ietf.org/html/rfc1123#section-6.1.3.5) | |
| if (preg_match('/^[0-9]+$/', $element) > 0) return $diagnose ? ISEMAIL_TLDNUMERIC : false; // TLD can't be all-numeric (http://www.apps.ietf.org/rfc/rfc3696.html#sec-2) | |
| // Check DNS? | |
| if ($checkDNS && function_exists('checkdnsrr')) { | |
| if (!(checkdnsrr($domain, 'A') || checkdnsrr($domain, 'MX'))) { | |
| return $diagnose ? ISEMAIL_DOMAINNOTFOUND : false; // Domain doesn't actually exist | |
| } | |
| } | |
| } | |
| // Eliminate all other factors, and the one which remains must be the truth. | |
| // (Sherlock Holmes, The Sign of Four) | |
| return $diagnose ? ISEMAIL_VALID : true; | |
| } | |
| /** | |
| * PROGRAM : PHP Credid Card Validation Library | |
| * VERSION : 1.00 | |
| * Author : John Cokos, iWeb, Inc. | |
| * http://www.virtualpromote.com/tools/cccheck/cccheck.txt | |
| * Copyright and Legal Notices: | |
| * All source code, images, programs, files included in this distribution | |
| * Copyright (c) 1996 - 2003 | |
| * John C. Cokos, The CCS Network, Inc. iWeb, Inc. | |
| * All Rights Reserved. | |
| * Use, distibution, sale, or access to this program is forbidden without | |
| * permission, except were permitted by the license agreement. | |
| */ | |
| public static function creditCard($ccnum, $cctype = null) { | |
| $ccnum = preg_replace('/[^0-9]/', '',$ccnum); | |
| $type = self::cc_check_type($ccnum); | |
| if(!$type) return false; | |
| $valid = self::cc_check_number($ccnum); | |
| if(isset($cctype)) { | |
| return $valid && $cctype == $type; | |
| } else { | |
| return $valid; | |
| } | |
| } | |
| // Prefix and Length checks | |
| public static function cc_check_type($ccnum) { | |
| $cardtype = ""; | |
| $len = strlen($ccnum); | |
| if ( $len == 15 && substr($ccnum, 0, 1) == '3' ) { | |
| $cardtype = "amex"; | |
| } else if ($len == 16 && substr($ccnum, 0, 4) == '6011') { | |
| $cardtype = "discover"; | |
| } else if ($len == 16 && substr($ccnum, 0, 1) == '5') { | |
| $cardtype = "mc"; | |
| } else if (($len == 16 || $len == 13) && substr($ccnum, 0, 1) == '4') { | |
| $cardtype = "visa"; | |
| } | |
| return $cardtype; | |
| } | |
| // MOD 10 checks | |
| public static function cc_check_number($cardnumber) { | |
| $dig = str_split($cardnumber); | |
| $numdig = sizeof ($dig); | |
| $j = 0; | |
| for ($i=($numdig-2); $i>=0; $i-=2) { | |
| $dbl[$j] = $dig[$i] * 2; | |
| $j++; | |
| } | |
| $dblsz = sizeof($dbl); | |
| $validate = 0; | |
| for ($i=0;$i<$dblsz;$i++){ | |
| $add = str_split($dbl[$i]); | |
| for ($j=0;$j<sizeof($add);$j++) { | |
| $validate += $add[$j]; | |
| } | |
| } | |
| for ($i=($numdig-1); $i>=0; $i-=2) { | |
| $validate += $dig[$i]; | |
| } | |
| return substr($validate, -1, 1) == '0'; | |
| } | |
| // exp date checks | |
| public static function cc_exp($exp) { | |
| preg_match('/^([\d]{2})([\d]{2})$/', $exp, $matches); | |
| if(count($matches) == 3) { | |
| if($matches[1] <= 12) { | |
| return true; | |
| } | |
| } | |
| return false; | |
| } | |
| } |
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