Subversion Repositories cheapmusic

<?php
/**
 * Bar codes checker - Checks if a barcode is valid and returns barcode type
 *
 * @link                http://www.phpclasses.org/package/8560-PHP-Detect-type-and-check-EAN-and-UPC-barcodes.html
 * @author              Ferry Bouwhuis
 * @version             1.0.1
 * @LastChange  2014-04-13
 */

class clsLibGTIN {
    public static function GTINCheck($p_sGTINCode, $p_bReturnGTIN14 = false, $p_getType = 0) {
        //Setting return value
        /*
         * If TRUE it will retun al barcodes as 14 digit strings
         * If FALSE it will return only what is needed UPC -> 12 / EAN -> 13 /
        */
        $bReturnGTIN14 = $p_bReturnGTIN14;

        //Filter UPC coupon codes
        /*
         * If TRUE it will return false on UPC coupon codes
         * Type will always return UPC coupon code
        */
        $bSkipCouponCodes = true;

        //Trims parsed string to remove unwanted whitespace or characters
        $p_sGTINCode = (string)trim($p_sGTINCode);
        if (preg_match('/[^0-9]/', $p_sGTINCode)) return false;

        if (!is_string($p_sGTINCode)) {
            $p_sGTINCode = strval($p_sGTINCode);
        }
        $sGTINCode = trim($p_sGTINCode);
        $p_sGTINCode = null;
        $length = strlen($sGTINCode);
        if (($length > 11 && $length <= 14) || $length == 8) {
            $zeroes = 18 - $length;
            $length = null;
            $fill = "";
            for ($i = 0;$i < $zeroes;$i++) {
                $fill .= "0";
            }
            $zeroes = null;
            $i = null;
            $sGTINCode = $fill . $sGTINCode;
            $fill = null;
            if (!clsLibGTIN::GTINCheckDigit($sGTINCode)) {
                return false;
            }
            elseif (substr($sGTINCode, 5, 1) > 2) {
                //EAN / JAN / EAN-13 code
                if ($p_getType) {
                    if (in_array(substr($sGTINCode, 5, 3) , array(
                        "978",
                        "979"
                    ))) {
                        return 'ISBN';
                    }
                    else {
                        return 'EAN';
                    }
                }
                else {
                    return (string)substr($sGTINCode, ($bReturnGTIN14 ? -14 : -13));
                }
            }
            elseif (substr($sGTINCode, 6, 1) == 0 && substr($sGTINCode, 0, 10) == 0) {
                //EAN-8 / GTIN-8 code
                if ($p_getType) {
                    return 'EAN-8';
                }
                else {
                    return (string)substr($sGTINCode, ($bReturnGTIN14 ? -14 : -8));
                }
            }
            elseif (substr($sGTINCode, 5, 1) <= 0) {
                //UPC / UCC-12 GTIN-12 code
                if ($p_getType) {
                    if (substr($sGTINCode, 6, 1) == 5) return 'UPC coupon code';
                    else return 'UPC';
                }
                else {
                    if ($bSkipCouponCodes && substr($sGTINCode, 6, 1) == 5) return false;

                    return (string)substr($sGTINCode, ($bReturnGTIN14 ? -14 : -12));
                }
            }
            elseif (substr($sGTINCode, 0, 6) == 0) {
                //GTIN-14
                if ($p_getType) {
                    return 'GTIN-14';
                }
                else {
                    return (string)substr($sGTINCode, -14);
                }
            }
            else {
                //EAN code
                if ($p_getType) {
                    return 'EAN';
                }
                else {
                    return (string)substr($sGTINCode, ($bReturnGTIN14 ? -14 : -13));
                }
            }
        }
        else {
            return false;
        }
    }

    public static function GTINCheckDigit($p_sGTINCode) {
        $iCalculation = 0;
        for ($i = 0;$i < (strlen($p_sGTINCode) - 1);$i++) {
            $iCalculation += $i % 2 ? $p_sGTINCode[$i] * 1 : $p_sGTINCode[$i] * 3;
        }

        if (substr(10 - (substr($iCalculation, -1)) , -1) != substr($p_sGTINCode, -1)) {
            $iCalculation = null;
            $p_sGTINCode = null;
            return false;
        }
        else {
            $iCalculation = null;
            $p_sGTINCode = null;
            return true;
        }
    }

    public static function GTINCalcCheckDigit($p_sGTINCode) {
        $p_sGTINCode = (string)trim($p_sGTINCode);
        if (preg_match('/[^0-9]/', $p_sGTINCode)) return false;

        $p_sGTINCode .= 'X';
        $sGTINCode = trim($p_sGTINCode);
        $length = strlen($sGTINCode);
        if (($length > 11 && $length <= 14) || $length == 8) {
            $zeroes = 18 - $length;
            $length = null;
            $fill = "";
            for ($i = 0;$i < $zeroes;$i++) {
                $fill .= "0";
            }
            $zeroes = null;
            $sGTINCode = $fill . $sGTINCode;
            $fill = null;
        } else {
            return false;
        }
        $iCalculation = 0;
        for ($i = 0;$i < (strlen($sGTINCode) - 1);$i++) {
            $iCalculation += $i % 2 ? $sGTINCode[$i] * 1 : $sGTINCode[$i] * 3;
        }
        $iDigit = substr(10 - (substr($iCalculation, -1)) , -1);
        $iCalculation = null;
        $p_sGTINCode = null;
        return $iDigit;
    }
}
?>