/**
* Validate
*
* Determines if the UPC value is valid, IE the check digit
* matches.
*
* @param string $upc UPC to be inspected
* @throws UpcException If the UPC value is less than 6 digits or more than 12
* @return Returns TRUE if the UPC matches the UPC-E (GTIN12) standard,
* FALSE otherwise.
*/
public static function validate($upc)
{
$upc = trim($upc);
if (!is_numeric($upc)) {
throw new UpcException\UpcException('UPC Value can only contain numbers. UPC: ' . $upc, UpcException\UpcException::CODE_CONTAINS_CHARACTERS);
}
// Expand UPC
$upc = UpcEExpander::expand($upc);
$length = strlen($upc);
if (!$upc) {
return false;
}
$checkDigit = UpcEValidator::getCheckDigit($upc);
return intval($upc[$length - 1]) === intval($checkDigit);
}
/**
* Get Parity
*
* Gets the parity pattern number (0 or 1) and the associated check digit.
*
* When creating an expanded UPC-A value, the parity number is prepended
* to the expanded value and the check digit is appended.
*
* @param string $upc UPC to Match
*
*/
private static function getParity($upc)
{
$upcCheckDigit = null;
$upcParityDigit = null;
$checkDigitParityPattern = array(0 => array('EEEOOO' => 0, 'OOOEEE' => 1), 1 => array('EEOEOO' => 0, 'OOEOEE' => 1), 2 => array('EEOOEO' => 0, 'OOEEOE' => 1), 3 => array('EEOOOE' => 0, 'OOEEEO' => 1), 4 => array('EOEEOO' => 0, 'OEOOEE' => 1), 5 => array('EOOEEO' => 0, 'OEEOOE' => 1), 6 => array('EOOOEE' => 0, 'OEEEOO' => 1), 7 => array('EOEOEO' => 0, 'OEOEOE' => 1), 8 => array('EOEOOE' => 0, 'OEOEEO' => 1), 9 => array('EOOEOE' => 0, 'OEEOEO' => 1));
// Loop through each check digit pattern
// If our UPC matches either parity pattern, set the check
// digit value and the parity value
foreach ($checkDigitParityPattern as $checkDigit => $patterns) {
foreach ($patterns as $pattern => $parity) {
if (UpcEExpander::matchParityPattern($upc, $pattern)) {
$upcCheckDigit = $checkDigit;
$upcParityDigit = $parity;
}
}
}
return array('checkDigit' => $upcCheckDigit, 'parity' => $upcParityDigit);
}
/**
* checkCode
*
* Check Code will attempt to smartly detect the code type,
* IE UPC, EAN or ISBN10/13.
*
* Since most 13 DIGIT EAN's also validate as an ISBN, the type will be ISBN
* if the code validates as both.
*
* @param string $code Code to check.
* @return Returns an array with the code type, check digit and if
* the code is an ISBN, the ISBN parts. FALSE otherwise.
*/
public static function checkCode($code)
{
$isbn = array();
$upcValid = false;
$upcEValid = false;
$eanValid = false;
$isbnValid = false;
try {
$upcValid = ProductValidator::checkUpcA($code);
} catch (UpcException\UpcException $e) {
}
try {
$upcEValid = ProductValidator::checkUpcE($code);
} catch (UpcException\UpcException $e) {
}
try {
$eanValid = ProductValidator::checkEan($code);
} catch (EanException\EanException $e) {
}
try {
$isbnValid = ProductValidator::checkIsbn($code, $isbn);
} catch (IsbnException\IsbnException $e) {
}
$type = '';
$checkDigit = 0;
// UPC Code
if ($upcValid) {
$type = 'UPC-A';
$checkDigit = UpcValidator\UpcValidator::getCheckDigit($code);
} else {
if ($upcEValid) {
$type = 'UPC-E - ' . strlen($code);
$code = UpcEValidator\UpcEExpander::expand($code);
$checkDigit = UpcEValidator\UpcEValidator::getCheckDigit($code);
} else {
if ($eanValid) {
$type = 'EAN';
$checkDigit = EanValidator\EanValidator::getCheckDigit($code);
} else {
if ($isbnValid && !$eanValid) {
$type = 'ISBN';
$checkDigit = IsbnValidator\IsbnValidator::getCheckDigit($code);
} else {
return false;
}
}
}
}
// Return array of values
return array('type' => $type, 'checkDigit' => $checkDigit, 'isbn' => $isbn);
}
<?php
// Load Product Validator
// Recommended: Use Auto Loader
require_once __DIR__ . '/../ProductValidator.php';
use ProductValidator\UpcEValidator;
$upcE6 = '654321';
$upcE7 = '654321';
$upcE8 = '10055564';
// Expand the 6 digit code.
//$code = UpcEValidator\UpcEExpander::expand($upcE6);
//var_dump($code);
$code = UpcEValidator\UpcEExpander::expand('049871');
var_dump($code);
