Subversion Repositories cheapmusic

<?php
/**
 * Bar codes checker - Checks if a barcode can be valid en returns type of barcode
 * 
 * @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){    
                        $zerros = 18-$length;
                        $length = null;
                        $fill = "";
                        for($i = 0; $i < $zerros; $i++){
                                $fill .= "0";
                        }
                        $zerros = 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){
                                        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;
                }
        }
}
?>