tcpdf/barcodes.php

<?php
//============================================================+
// File name   : barcodes.php
// Begin       : 2008-06-09
// Last Update : 2009-04-11
// Version     : 1.0.006
// License     : GNU LGPL (http://www.gnu.org/copyleft/lesser.html)
// 	----------------------------------------------------------------------------
//  Copyright (C) 2008-2009 Nicola Asuni - Tecnick.com S.r.l.
// 	
// 	This program is free software: you can redistribute it and/or modify
// 	it under the terms of the GNU Lesser General Public License as published by
// 	the Free Software Foundation, either version 2.1 of the License, or
// 	(at your option) any later version.
// 	
// 	This program is distributed in the hope that it will be useful,
// 	but WITHOUT ANY WARRANTY; without even the implied warranty of
// 	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// 	GNU Lesser General Public License for more details.
// 	
// 	You should have received a copy of the GNU Lesser General Public License
// 	along with this program.  If not, see <http://www.gnu.org/licenses/>.
// 	
// 	See LICENSE.TXT file for more information.
//  ----------------------------------------------------------------------------
//
// Description : PHP class to creates array representations for 
//               common 1D barcodes to be used with TCPDF.
//
// Author: Nicola Asuni
//
// (c) Copyright:
//               Nicola Asuni
//               Tecnick.com S.r.l.
//               Via della Pace, 11
//               09044 Quartucciu (CA)
//               ITALY
//               www.tecnick.com
//               info@tecnick.com
//============================================================+

/**
 * PHP class to creates array representations for common 1D barcodes to be used with TCPDF.
 * @package com.tecnick.tcpdf
 * @abstract Functions for generating string representation of common 1D barcodes.
 * @author Nicola Asuni
 * @copyright 2008-2009 Nicola Asuni - Tecnick.com S.r.l (www.tecnick.com) Via Della Pace, 11 - 09044 - Quartucciu (CA) - ITALY - www.tecnick.com - info@tecnick.com
 * @link http://www.tcpdf.org
 * @license http://www.gnu.org/copyleft/lesser.html LGPL
 * @version 1.0.006
 */

	/**
	* PHP class to creates array representations for common 1D barcodes to be used with TCPDF (http://www.tcpdf.org).<br>
	* @name TCPDFBarcode
	* @package com.tecnick.tcpdf
	* @version 1.0.006
	* @author Nicola Asuni
	* @link http://www.tcpdf.org
	* @license http://www.gnu.org/copyleft/lesser.html LGPL
	*/
class TCPDFBarcode {
	
	/**
	 * @var array representation of barcode.
	 * @access protected
	 */
	protected $barcode_array;
		
	/**
	 * This is the class constructor. 
	 * Return an array representations for common 1D barcodes:<ul>
	 * <li>$arrcode['code'] code to be printed on text label</li>
	 * <li>$arrcode['maxh'] max bar height</li>
	 * <li>$arrcode['maxw'] max bar width</li>
	 * <li>$arrcode['bcode'][$k] single bar or space in $k position</li>
	 * <li>$arrcode['bcode'][$k]['t'] bar type: true = bar, false = space.</li>
	 * <li>$arrcode['bcode'][$k]['w'] bar width in units.</li>
	 * <li>$arrcode['bcode'][$k]['h'] bar height in units.</li>
	 * <li>$arrcode['bcode'][$k]['p'] bar top position (0 = top, 1 = middle)</li></ul>
	 * @param string $code code to print
 	 * @param string $type type of barcode: <ul><li>C39 : CODE 39 - ANSI MH10.8M-1983 - USD-3 - 3 of 9.</li><li>C39+ : CODE 39 with checksum</li><li>C39E : CODE 39 EXTENDED</li><li>C39E+ : CODE 39 EXTENDED + CHECKSUM</li><li>C93 : CODE 93 - USS-93</li><li>S25 : Standard 2 of 5</li><li>S25+ : Standard 2 of 5 + CHECKSUM</li><li>I25 : Interleaved 2 of 5</li><li>I25+ : Interleaved 2 of 5 + CHECKSUM</li><li>C128A : CODE 128 A</li><li>C128B : CODE 128 B</li><li>C128C : CODE 128 C</li><li>EAN2 : 2-Digits UPC-Based Extention</li><li>EAN5 : 5-Digits UPC-Based Extention</li><li>EAN8 : EAN 8</li><li>EAN13 : EAN 13</li><li>UPCA : UPC-A</li><li>UPCE : UPC-E</li><li>MSI : MSI (Variation of Plessey code)</li><li>MSI+ : MSI + CHECKSUM (modulo 11)</li><li>POSTNET : POSTNET</li><li>PLANET : PLANET</li><li>RMS4CC : RMS4CC (Royal Mail 4-state Customer Code) - CBC (Customer Bar Code)</li><li>KIX : KIX (Klant index - Customer index)</li><li>CODABAR : CODABAR</li><li>CODE11 : CODE 11</li><li>PHARMA : PHARMACODE</li><li>PHARMA2T : PHARMACODE TWO-TRACKS</li></ul>
	 */
	public function __construct($code, $type) {
		$this->setBarcode($code, $type);
	}
	
	/** 
	 * Return an array representations of barcode.
 	 * @return array
	 */
	public function getBarcodeArray() {
		return $this->barcode_array;
	}
	
	/** 
	 * Set the barcode.
	 * @param string $code code to print
 	 * @param string $type type of barcode: <ul><li>C39 : CODE 39 - ANSI MH10.8M-1983 - USD-3 - 3 of 9.</li><li>C39+ : CODE 39 with checksum</li><li>C39E : CODE 39 EXTENDED</li><li>C39E+ : CODE 39 EXTENDED + CHECKSUM</li><li>C93 : CODE 93 - USS-93</li><li>S25 : Standard 2 of 5</li><li>S25+ : Standard 2 of 5 + CHECKSUM</li><li>I25 : Interleaved 2 of 5</li><li>I25+ : Interleaved 2 of 5 + CHECKSUM</li><li>C128A : CODE 128 A</li><li>C128B : CODE 128 B</li><li>C128C : CODE 128 C</li><li>EAN2 : 2-Digits UPC-Based Extention</li><li>EAN5 : 5-Digits UPC-Based Extention</li><li>EAN8 : EAN 8</li><li>EAN13 : EAN 13</li><li>UPCA : UPC-A</li><li>UPCE : UPC-E</li><li>MSI : MSI (Variation of Plessey code)</li><li>MSI+ : MSI + CHECKSUM (modulo 11)</li><li>POSTNET : POSTNET</li><li>PLANET : PLANET</li><li>RMS4CC : RMS4CC (Royal Mail 4-state Customer Code) - CBC (Customer Bar Code)</li><li>KIX : KIX (Klant index - Customer index)</li><li>CODABAR : CODABAR</li><li>CODE11 : CODE 11</li><li>PHARMA : PHARMACODE</li><li>PHARMA2T : PHARMACODE TWO-TRACKS</li></ul>
 	 * @return array
	 */
	public function setBarcode($code, $type) {
		switch (strtoupper($type)) {
			case 'C39': { // CODE 39 - ANSI MH10.8M-1983 - USD-3 - 3 of 9.
				$arrcode = $this->barcode_code39($code, false, false);
				break;
			}
			case 'C39+': { // CODE 39 with checksum
				$arrcode = $this->barcode_code39($code, false, true);
				break;
			}
			case 'C39E': { // CODE 39 EXTENDED
				$arrcode = $this->barcode_code39($code, true, false);
				break;
			}
			case 'C39E+': { // CODE 39 EXTENDED + CHECKSUM
				$arrcode = $this->barcode_code39($code, true, true);
				break;
			}
			case 'C93': { // CODE 93 - USS-93
				$arrcode = $this->barcode_code93($code);
				break;
			}
			case 'S25': { // Standard 2 of 5
				$arrcode = $this->barcode_s25($code, false);
				break;
			}
			case 'S25+': { // Standard 2 of 5 + CHECKSUM
				$arrcode = $this->barcode_s25($code, true);
				break;
			}
			case 'I25': { // Interleaved 2 of 5
				$arrcode = $this->barcode_i25($code, false);
				break;
			}
			case 'I25+': { // Interleaved 2 of 5 + CHECKSUM
				$arrcode = $this->barcode_i25($code, true);
				break;
			}
			case 'C128A': { // CODE 128 A
				$arrcode = $this->barcode_c128($code, 'A');
				break;
			}
			case 'C128B': { // CODE 128 B
				$arrcode = $this->barcode_c128($code, 'B');
				break;
			}
			case 'C128C': { // CODE 128 C
				$arrcode = $this->barcode_c128($code, 'C');
				break;
			}
			case 'EAN2': { // 2-Digits UPC-Based Extention
				$arrcode = $this->barcode_eanext($code, 2);
				break;
			}
			case 'EAN5': { // 5-Digits UPC-Based Extention
				$arrcode = $this->barcode_eanext($code, 5);
				break;
			}
			case 'EAN8': { // EAN 8
				$arrcode = $this->barcode_eanupc($code, 8);
				break;
			}
			case 'EAN13': { // EAN 13
				$arrcode = $this->barcode_eanupc($code, 13);
				break;
			}
			case 'UPCA': { // UPC-A
				$arrcode = $this->barcode_eanupc($code, 12);
				break;
			}
			case 'UPCE': { // UPC-E
				$arrcode = $this->barcode_eanupc($code, 6);
				break;
			}
			case 'MSI': { // MSI (Variation of Plessey code)
				$arrcode = $this->barcode_msi($code, false);
				break;
			}
			case 'MSI+': { // MSI + CHECKSUM (modulo 11)
				$arrcode = $this->barcode_msi($code, true);
				break;
			}
			case 'POSTNET': { // POSTNET
				$arrcode = $this->barcode_postnet($code, false);
				break;
			}
			case 'PLANET': { // PLANET
				$arrcode = $this->barcode_postnet($code, true);
				break;
			}
			case 'RMS4CC': { // RMS4CC (Royal Mail 4-state Customer Code) - CBC (Customer Bar Code)
				$arrcode = $this->barcode_rms4cc($code, false);
				break;
			}
			case 'KIX': { // KIX (Klant index - Customer index)
				$arrcode = $this->barcode_rms4cc($code, true);
				break;
			}			
			case 'CODABAR': { // CODABAR
				$arrcode = $this->barcode_codabar($code);
				break;
			}
			case 'CODE11': { // CODE 11
				$arrcode = $this->barcode_code11($code);
				break;
			}
			case 'PHARMA': { // PHARMACODE
				$arrcode = $this->barcode_pharmacode($code);
				break;
			}
			case 'PHARMA2T': { // PHARMACODE TWO-TRACKS
				$arrcode = $this->barcode_pharmacode2t($code);
				break;
			}
			default: {
				$this->barcode_array = false;
			}
		}
		$this->barcode_array = $arrcode;
	}
	
	/**
	 * CODE 39 - ANSI MH10.8M-1983 - USD-3 - 3 of 9.
	 * General-purpose code in very wide use world-wide
	 * @param string $code code to represent.
	 * @param boolean $checksum if true add a checksum to the code
	 * @return array barcode representation.
	 * @access protected
	 */
	protected function barcode_code39($code, $extended=false, $checksum=false) {
		$chr['0'] = '111221211';
		$chr['1'] = '211211112';
		$chr['2'] = '112211112';
		$chr['3'] = '212211111';
		$chr['4'] = '111221112';
		$chr['5'] = '211221111';
		$chr['6'] = '112221111';
		$chr['7'] = '111211212';
		$chr['8'] = '211211211';
		$chr['9'] = '112211211';
		$chr['A'] = '211112112';
		$chr['B'] = '112112112';
		$chr['C'] = '212112111';
		$chr['D'] = '111122112';
		$chr['E'] = '211122111';
		$chr['F'] = '112122111';
		$chr['G'] = '111112212';
		$chr['H'] = '211112211';
		$chr['I'] = '112112211';
		$chr['J'] = '111122211';
		$chr['K'] = '211111122';
		$chr['L'] = '112111122';
		$chr['M'] = '212111121';
		$chr['N'] = '111121122';
		$chr['O'] = '211121121';
		$chr['P'] = '112121121';
		$chr['Q'] = '111111222';
		$chr['R'] = '211111221';
		$chr['S'] = '112111221';
		$chr['T'] = '111121221';
		$chr['U'] = '221111112';
		$chr['V'] = '122111112';
		$chr['W'] = '222111111';
		$chr['X'] = '121121112';
		$chr['Y'] = '221121111';
		$chr['Z'] = '122121111';
		$chr['-'] = '121111212';
		$chr['.'] = '221111211';
		$chr[' '] = '122111211';
		$chr['$'] = '121212111';
		$chr['/'] = '121211121';
		$chr['+'] = '121112121';
		$chr['%'] = '111212121';
		$chr['*'] = '121121211';
		
		$code = strtoupper($code);
		if ($extended) {
			// extended mode
			$code = $this->encode_code39_ext($code);
		}
		if ($code === false) {
			return false;
		}
		if ($checksum) {
			// checksum
			$code .= $this->checksum_code39($code);
		}
		// add start and stop codes
		$code = '*'.$code.'*';
		
		$bararray = array('code' => $code, 'maxw' => 0, 'maxh' => 1, 'bcode' => array());
		$k = 0;
		$clen = strlen($code);
		for ($i = 0; $i < $clen; ++$i) {
			$char = $code{$i};
			if(!isset($chr[$char])) {
				// invalid character
				return false;
			}
			for ($j = 0; $j < 9; ++$j) {
				if (($j % 2) == 0) {
					$t = true; // bar
				} else {
					$t = false; // space
				}
				$w = $chr[$char]{$j};
				$bararray['bcode'][$k] = array('t' => $t, 'w' => $w, 'h' => 1, 'p' => 0);
				$bararray['maxw'] += $w;
				++$k;
			}
			$bararray['bcode'][$k] = array('t' => false, 'w' => 1, 'h' => 1, 'p' => 0);
			$bararray['maxw'] += 1;
			++$k;
		}
		return $bararray;
	}
	
	/**
	 * Encode a string to be used for CODE 39 Extended mode.
	 * @param string $code code to represent.
	 * @return encoded string.
	 * @access protected
	 */
	protected function encode_code39_ext($code) {
		$encode = array(
			chr(0) => '%U', chr(1) => '$A', chr(2) => '$B', chr(3) => '$C',
			chr(4) => '$D', chr(5) => '$E', chr(6) => '$F', chr(7) => '$G',
			chr(8) => '$H', chr(9) => '$I', chr(10) => '$J', chr(11) => '<27>K',
			chr(12) => '$L', chr(13) => '$M', chr(14) => '$N', chr(15) => '$O',
			chr(16) => '$P', chr(17) => '$Q', chr(18) => '$R', chr(19) => '$S',
			chr(20) => '$T', chr(21) => '$U', chr(22) => '$V', chr(23) => '$W',
			chr(24) => '$X', chr(25) => '$Y', chr(26) => '$Z', chr(27) => '%A',
			chr(28) => '%B', chr(29) => '%C', chr(30) => '%D', chr(31) => '%E',
			chr(32) => ' ', chr(33) => '/A', chr(34) => '/B', chr(35) => '/C',
			chr(36) => '/D', chr(37) => '/E', chr(38) => '/F', chr(39) => '/G',
			chr(40) => '/H', chr(41) => '/I', chr(42) => '/J', chr(43) => '/K',
			chr(44) => '/L', chr(45) => '-', chr(46) => '.', chr(47) => '/O',
			chr(48) => '0', chr(49) => '1', chr(50) => '2', chr(51) => '3',
			chr(52) => '4', chr(53) => '5', chr(54) => '6', chr(55) => '7',
			chr(56) => '8', chr(57) => '9', chr(58) => '/Z', chr(59) => '%F',
			chr(60) => '%G', chr(61) => '%H', chr(62) => '%I', chr(63) => '%J',
			chr(64) => '%V', chr(65) => 'A', chr(66) => 'B', chr(67) => 'C',
			chr(68) => 'D', chr(69) => 'E', chr(70) => 'F', chr(71) => 'G',
			chr(72) => 'H', chr(73) => 'I', chr(74) => 'J', chr(75) => 'K',
			chr(76) => 'L', chr(77) => 'M', chr(78) => 'N', chr(79) => 'O',
			chr(80) => 'P', chr(81) => 'Q', chr(82) => 'R', chr(83) => 'S',
			chr(84) => 'T', chr(85) => 'U', chr(86) => 'V', chr(87) => 'W',
			chr(88) => 'X', chr(89) => 'Y', chr(90) => 'Z', chr(91) => '%K',
			chr(92) => '%L', chr(93) => '%M', chr(94) => '%N', chr(95) => '%O',
			chr(96) => '%W', chr(97) => '+A', chr(98) => '+B', chr(99) => '+C',
			chr(100) => '+D', chr(101) => '+E', chr(102) => '+F', chr(103) => '+G',
			chr(104) => '+H', chr(105) => '+I', chr(106) => '+J', chr(107) => '+K',
			chr(108) => '+L', chr(109) => '+M', chr(110) => '+N', chr(111) => '+O',
			chr(112) => '+P', chr(113) => '+Q', chr(114) => '+R', chr(115) => '+S',
			chr(116) => '+T', chr(117) => '+U', chr(118) => '+V', chr(119) => '+W',
			chr(120) => '+X', chr(121) => '+Y', chr(122) => '+Z', chr(123) => '%P',
			chr(124) => '%Q', chr(125) => '%R', chr(126) => '%S', chr(127) => '%T');
		$code_ext = '';
		$clen = strlen($code);
		for ($i = 0 ; $i < $clen; ++$i) {
			if (ord($code{$i}) > 127) {
				return false;
			}
			$code_ext .= $encode[$code{$i}];
		}
		return $code_ext;
	}
	
	/**
	 * Calculate CODE 39 checksum (modulo 43).
	 * @param string $code code to represent.
	 * @return char checksum.
	 * @access protected
	 */
	protected function checksum_code39($code) {
		$chars = array(
			'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
			'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K',
			'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V',
			'W', 'X', 'Y', 'Z', '-', '.', ' ', '$', '/', '+', '%');
		$sum = 0;
		$clen = strlen($code);
		for ($i = 0 ; $i < $clen; ++$i) {
			$k = array_keys($chars, $code{$i});
			$sum += $k[0];
		}
		$j = ($sum % 43);
		return $chars[$j];
	}
	
	/**
	 * CODE 93 - USS-93
	 * Compact code similar to Code 39
	 * @param string $code code to represent.
	 * @param boolean $checksum if true add a checksum to the code
	 * @return array barcode representation.
	 * @access protected
	 */
	protected function barcode_code93($code) {
		$chr['0'] = '131112';
		$chr['1'] = '111213';
		$chr['2'] = '111312';
		$chr['3'] = '111411';
		$chr['4'] = '121113';
		$chr['5'] = '121212';
		$chr['6'] = '121311';
		$chr['7'] = '111114';
		$chr['8'] = '131211';
		$chr['9'] = '141111';
		$chr['A'] = '211113';
		$chr['B'] = '211212';
		$chr['C'] = '211311';
		$chr['D'] = '221112';
		$chr['E'] = '221211';
		$chr['F'] = '231111';
		$chr['G'] = '112113';
		$chr['H'] = '112212';
		$chr['I'] = '112311';
		$chr['J'] = '122112';
		$chr['K'] = '132111';
		$chr['L'] = '111123';
		$chr['M'] = '111222';
		$chr['N'] = '111321';
		$chr['O'] = '121122';
		$chr['P'] = '131121';
		$chr['Q'] = '212112';
		$chr['R'] = '212211';
		$chr['S'] = '211122';
		$chr['T'] = '211221';
		$chr['U'] = '221121';
		$chr['V'] = '222111';
		$chr['W'] = '112122';
		$chr['X'] = '112221';
		$chr['Y'] = '122121';
		$chr['Z'] = '123111';
		$chr['-'] = '121131';
		$chr['.'] = '311112';
		$chr[' '] = '311211';
		$chr['$'] = '321111';
		$chr['/'] = '112131';
		$chr['+'] = '113121';
		$chr['%'] = '211131';
		$chr[128] = '121221'; // ($)
		$chr[129] = '311121'; // (/)
		$chr[130] = '122211'; // (+)
		$chr[131] = '312111'; // (%)
		$chr['*'] = '111141';
		$code = strtoupper($code);
		$encode = array(
			chr(0) => chr(131).'U', chr(1) => chr(128).'A', chr(2) => chr(128).'B', chr(3) => chr(128).'C',
			chr(4) => chr(128).'D', chr(5) => chr(128).'E', chr(6) => chr(128).'F', chr(7) => chr(128).'G',
			chr(8) => chr(128).'H', chr(9) => chr(128).'I', chr(10) => chr(128).'J', chr(11) => '<27>K',
			chr(12) => chr(128).'L', chr(13) => chr(128).'M', chr(14) => chr(128).'N', chr(15) => chr(128).'O',
			chr(16) => chr(128).'P', chr(17) => chr(128).'Q', chr(18) => chr(128).'R', chr(19) => chr(128).'S',
			chr(20) => chr(128).'T', chr(21) => chr(128).'U', chr(22) => chr(128).'V', chr(23) => chr(128).'W',
			chr(24) => chr(128).'X', chr(25) => chr(128).'Y', chr(26) => chr(128).'Z', chr(27) => chr(131).'A',
			chr(28) => chr(131).'B', chr(29) => chr(131).'C', chr(30) => chr(131).'D', chr(31) => chr(131).'E',
			chr(32) => ' ', chr(33) => chr(129).'A', chr(34) => chr(129).'B', chr(35) => chr(129).'C',
			chr(36) => chr(129).'D', chr(37) => chr(129).'E', chr(38) => chr(129).'F', chr(39) => chr(129).'G',
			chr(40) => chr(129).'H', chr(41) => chr(129).'I', chr(42) => chr(129).'J', chr(43) => chr(129).'K',
			chr(44) => chr(129).'L', chr(45) => '-', chr(46) => '.', chr(47) => chr(129).'O',
			chr(48) => '0', chr(49) => '1', chr(50) => '2', chr(51) => '3',
			chr(52) => '4', chr(53) => '5', chr(54) => '6', chr(55) => '7',
			chr(56) => '8', chr(57) => '9', chr(58) => chr(129).'Z', chr(59) => chr(131).'F',
			chr(60) => chr(131).'G', chr(61) => chr(131).'H', chr(62) => chr(131).'I', chr(63) => chr(131).'J',
			chr(64) => chr(131).'V', chr(65) => 'A', chr(66) => 'B', chr(67) => 'C',
			chr(68) => 'D', chr(69) => 'E', chr(70) => 'F', chr(71) => 'G',
			chr(72) => 'H', chr(73) => 'I', chr(74) => 'J', chr(75) => 'K',
			chr(76) => 'L', chr(77) => 'M', chr(78) => 'N', chr(79) => 'O',
			chr(80) => 'P', chr(81) => 'Q', chr(82) => 'R', chr(83) => 'S',
			chr(84) => 'T', chr(85) => 'U', chr(86) => 'V', chr(87) => 'W',
			chr(88) => 'X', chr(89) => 'Y', chr(90) => 'Z', chr(91) => chr(131).'K',
			chr(92) => chr(131).'L', chr(93) => chr(131).'M', chr(94) => chr(131).'N', chr(95) => chr(131).'O',
			chr(96) => chr(131).'W', chr(97) => chr(130).'A', chr(98) => chr(130).'B', chr(99) => chr(130).'C',
			chr(100) => chr(130).'D', chr(101) => chr(130).'E', chr(102) => chr(130).'F', chr(103) => chr(130).'G',
			chr(104) => chr(130).'H', chr(105) => chr(130).'I', chr(106) => chr(130).'J', chr(107) => chr(130).'K',
			chr(108) => chr(130).'L', chr(109) => chr(130).'M', chr(110) => chr(130).'N', chr(111) => chr(130).'O',
			chr(112) => chr(130).'P', chr(113) => chr(130).'Q', chr(114) => chr(130).'R', chr(115) => chr(130).'S',
			chr(116) => chr(130).'T', chr(117) => chr(130).'U', chr(118) => chr(130).'V', chr(119) => chr(130).'W',
			chr(120) => chr(130).'X', chr(121) => chr(130).'Y', chr(122) => chr(130).'Z', chr(123) => chr(131).'P',
			chr(124) => chr(131).'Q', chr(125) => chr(131).'R', chr(126) => chr(131).'S', chr(127) => chr(131).'T');
		$code_ext = '';
		$clen = strlen($code);
		for ($i = 0 ; $i < $clen; ++$i) {
			if (ord($code{$i}) > 127) {
				return false;
			}
			$code_ext .= $encode[$code{$i}];
		}
		// checksum
		$code .= $this->checksum_code93($code);
		// add start and stop codes
		$code = '*'.$code.'*';
		$bararray = array('code' => $code, 'maxw' => 0, 'maxh' => 1, 'bcode' => array());
		$k = 0;
		$clen = strlen($code);
		for ($i = 0; $i < $clen; ++$i) {
			$char = $code{$i};
			if(!isset($chr[$char])) {
				// invalid character
				return false;
			}
			for ($j = 0; $j < 6; ++$j) {
				if (($j % 2) == 0) {
					$t = true; // bar
				} else {
					$t = false; // space
				}
				$w = $chr[$char]{$j};
				$bararray['bcode'][$k] = array('t' => $t, 'w' => $w, 'h' => 1, 'p' => 0);
				$bararray['maxw'] += $w;
				++$k;
			}
		}
		$bararray['bcode'][$k] = array('t' => true, 'w' => 1, 'h' => 1, 'p' => 0);
		$bararray['maxw'] += 1;
		++$k;		
		return $bararray;
	}
	
	/**
	 * Calculate CODE 93 checksum (modulo 47).
	 * @param string $code code to represent.
	 * @return string checksum code.
	 * @access protected
	 */
	protected function checksum_code93($code) {
		$chars = array(
			'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
			'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K',
			'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V',
			'W', 'X', 'Y', 'Z', '-', '.', ' ', '$', '/', '+', '%');
		// translate special characters
		$code = strtr($code, chr(128).chr(129).chr(130).chr(131), '$/+%');	
		$len = strlen($code);
		// calculate check digit C
		$p = 1;
		$check = 0;
		for ($i = ($len - 1); $i >= 0; --$i) {
			$k = array_keys($chars, $code{$i});
			$check += ($k[0] * $p);
			++$p;
			if ($p > 20) {
				$p = 1;
			}
		}
		$check %= 47;
		$c = $chars[$check];
		$code .= $c;
		// calculate check digit K
		$p = 1;
		$check = 0;
		for ($i = $len; $i >= 0; --$i) {
			$k = array_keys($chars, $code{$i});
			$check += ($k[0] * $p);
			++$p;
			if ($p > 15) {
				$p = 1;
			}
		}
		$check %= 47;
		$k = $chars[$check];
		return $c.$k;
	}
	
	/**
	 * Checksum for standard 2 of 5 barcodes.
	 * @param string $code code to process.
	 * @return int checksum.
	 * @access protected
	 */
	protected function checksum_s25($code) {
		$len = strlen($code);
		$sum = 0;
		for ($i = 0; $i < $len; $i+=2) {
			$sum += $code{$i};
		}
		$sum *= 3;
		for ($i = 1; $i < $len; $i+=2) {
			$sum += ($code{$i});
		}
		$r = $sum % 10;
		if($r > 0) {
			$r = (10 - $r);
		}
		return $r;
	}
	
	/**
	 * MSI.
	 * Variation of Plessey code, with similar applications 
	 * Contains digits (0 to 9) and encodes the data only in the width of bars.
	 * @param string $code code to represent.
	 * @param boolean $checksum if true add a checksum to the code (modulo 11)
	 * @return array barcode representation.
	 * @access protected
	 */
	protected function barcode_msi($code, $checksum=false) {
		$chr['0'] = '100100100100';
		$chr['1'] = '100100100110';
		$chr['2'] = '100100110100';
		$chr['3'] = '100100110110';
		$chr['4'] = '100110100100';
		$chr['5'] = '100110100110';
		$chr['6'] = '100110110100';
		$chr['7'] = '100110110110';
		$chr['8'] = '110100100100';
		$chr['9'] = '110100100110';
		$chr['A'] = '110100110100';
		$chr['B'] = '110100110110';
		$chr['C'] = '110110100100';
		$chr['D'] = '110110100110';
		$chr['E'] = '110110110100';
		$chr['F'] = '110110110110';
		if ($checksum) {
			// add checksum
			$clen = strlen($code);
			$p = 2;
			$check = 0;
			for ($i = ($clen - 1); $i >= 0; --$i) {
				$check += (hexdec($code{$i}) * $p);
				++$p;
				if ($p > 7) {
					$p = 2;
				}
			}
			$check %= 11;
			if ($check > 0) {
				$check = 11 - $check;
			}
			$code .= $check;
		}
		$seq = '110'; // left guard
		$clen = strlen($code);
		for ($i = 0; $i < $clen; ++$i) {
			$digit = $code{$i};
			if (!isset($chr[$digit])) {
				// invalid character
				return false;
			}
			$seq .= $chr[$digit];
		}		
		$seq .= '1001'; // right guard
		$bararray = array('code' => $code, 'maxw' => 0, 'maxh' => 1, 'bcode' => array());
		return $this->binseq_to_array($seq, $bararray);
	}
	
	/**
	 * Standard 2 of 5 barcodes.
	 * Used in airline ticket marking, photofinishing
	 * Contains digits (0 to 9) and encodes the data only in the width of bars.
	 * @param string $code code to represent.
	 * @param boolean $checksum if true add a checksum to the code
	 * @return array barcode representation.
	 * @access protected
	 */
	protected function barcode_s25($code, $checksum=false) {
		$chr['0'] = '10101110111010';
		$chr['1'] = '11101010101110';
		$chr['2'] = '10111010101110';
		$chr['3'] = '11101110101010';
		$chr['4'] = '10101110101110';
		$chr['5'] = '11101011101010';
		$chr['6'] = '10111011101010';
		$chr['7'] = '10101011101110';
		$chr['8'] = '10101110111010';
		$chr['9'] = '10111010111010';
		if ($checksum) {
			// add checksum
			$code .= $this->checksum_s25($code);
		}
		if((strlen($code) % 2) != 0) {
			// add leading zero if code-length is odd
			$code = '0'.$code;
		}
		$seq = '11011010';
		$clen = strlen($code);
		for ($i = 0; $i < $clen; ++$i) {
			$digit = $code{$i};
			if (!isset($chr[$digit])) {
				// invalid character
				return false;
			}
			$seq .= $chr[$digit];
		}		
		$seq .= '1101011';
		$bararray = array('code' => $code, 'maxw' => 0, 'maxh' => 1, 'bcode' => array());
		return $this->binseq_to_array($seq, $bararray);
	}
	
	/**
	 * Convert binary barcode sequence to TCPDF barcode array
	 * @param string $seq barcode as binary sequence
	 * <EFBFBD>param array $bararray TCPDF barcode array to fill up
	 * @return array barcode representation.
	 * @access protected
	 */
	protected function binseq_to_array($seq, $bararray) {
		$len = strlen($seq);
		$w = 0;
		$k = 0;
		for ($i = 0; $i < $len; ++$i) {
			$w += 1;
			if (($i == ($len - 1)) OR (($i < ($len - 1)) AND ($seq{$i} != $seq{($i+1)}))) {
				if ($seq{$i} == '1') {
					$t = true; // bar
				} else {
					$t = false; // space
				}
				$bararray['bcode'][$k] = array('t' => $t, 'w' => $w, 'h' => 1, 'p' => 0);
				$bararray['maxw'] += $w;
				++$k;
				$w = 0;
			}
		}
		return $bararray;
	}
	
	/**
	 * Interleaved 2 of 5 barcodes.
	 * Compact numeric code, widely used in industry, air cargo
	 * Contains digits (0 to 9) and encodes the data in the width of both bars and spaces.
	 * @param string $code code to represent.
	 * @param boolean $checksum if true add a checksum to the code
	 * @return array barcode representation.
	 * @access protected
	 */
	protected function barcode_i25($code, $checksum=false) {
		$chr['0'] = '11221';
		$chr['1'] = '21112';
		$chr['2'] = '12112';
		$chr['3'] = '22111';
		$chr['4'] = '11212';
		$chr['5'] = '21211';
		$chr['6'] = '12211';
		$chr['7'] = '11122';
		$chr['8'] = '21121';
		$chr['9'] = '12121';
		$chr['A'] = '11';
		$chr['Z'] = '21';
		if ($checksum) {
			// add checksum
			$code .= $this->checksum_s25($code);
		}
		if((strlen($code) % 2) != 0) {
			// add leading zero if code-length is odd
			$code = '0'.$code;
		}
		// add start and stop codes
		$code = 'AA'.strtolower($code).'ZA';
			
		$bararray = array('code' => $code, 'maxw' => 0, 'maxh' => 1, 'bcode' => array());
		$k = 0;
		$clen = strlen($code);
		for ($i = 0; $i < $clen; $i = ($i + 2)) {
			$char_bar = $code{$i};
			$char_space = $code{$i+1};
			if((!isset($chr[$char_bar])) OR (!isset($chr[$char_space]))) {
				// invalid character
				return false;
			}
			// create a bar-space sequence
			$seq = '';
			$chrlen = strlen($chr[$char_bar]);
			for ($s = 0; $s < $chrlen; $s++){
				$seq .= $chr[$char_bar]{$s} . $chr[$char_space]{$s};
			}
			$seqlen = strlen($seq);
			for ($j = 0; $j < $seqlen; ++$j) {
				if (($j % 2) == 0) {
					$t = true; // bar
				} else {
					$t = false; // space
				}
				$w = $seq{$j};
				$bararray['bcode'][$k] = array('t' => $t, 'w' => $w, 'h' => 1, 'p' => 0);
				$bararray['maxw'] += $w;
				++$k;
			}
		}
		return $bararray;
	}
	
	/**
	 * C128 barcodes. 
	 * Very capable code, excellent density, high reliability; in very wide use world-wide
	 * @param string $code code to represent.
	 * @param string $type barcode type: A, B or C
	 * @return array barcode representation.
	 * @access protected
	 */
	protected function barcode_c128($code, $type='B') {
		$chr = array(
			'212222', /* 00 */
			'222122', /* 01 */
			'222221', /* 02 */
			'121223', /* 03 */
			'121322', /* 04 */
			'131222', /* 05 */
			'122213', /* 06 */
			'122312', /* 07 */
			'132212', /* 08 */
			'221213', /* 09 */
			'221312', /* 10 */
			'231212', /* 11 */
			'112232', /* 12 */
			'122132', /* 13 */
			'122231', /* 14 */
			'113222', /* 15 */
			'123122', /* 16 */
			'123221', /* 17 */
			'223211', /* 18 */
			'221132', /* 19 */
			'221231', /* 20 */
			'213212', /* 21 */
			'223112', /* 22 */
			'312131', /* 23 */
			'311222', /* 24 */
			'321122', /* 25 */
			'321221', /* 26 */
			'312212', /* 27 */
			'322112', /* 28 */
			'322211', /* 29 */
			'212123', /* 30 */
			'212321', /* 31 */
			'232121', /* 32 */
			'111323', /* 33 */
			'131123', /* 34 */
			'131321', /* 35 */
			'112313', /* 36 */
			'132113', /* 37 */
			'132311', /* 38 */
			'211313', /* 39 */
			'231113', /* 40 */
			'231311', /* 41 */
			'112133', /* 42 */
			'112331', /* 43 */
			'132131', /* 44 */
			'113123', /* 45 */
			'113321', /* 46 */
			'133121', /* 47 */
			'313121', /* 48 */
			'211331', /* 49 */
			'231131', /* 50 */
			'213113', /* 51 */
			'213311', /* 52 */
			'213131', /* 53 */
			'311123', /* 54 */
			'311321', /* 55 */
			'331121', /* 56 */
			'312113', /* 57 */
			'312311', /* 58 */
			'332111', /* 59 */
			'314111', /* 60 */
			'221411', /* 61 */
			'431111', /* 62 */
			'111224', /* 63 */
			'111422', /* 64 */
			'121124', /* 65 */
			'121421', /* 66 */
			'141122', /* 67 */
			'141221', /* 68 */
			'112214', /* 69 */
			'112412', /* 70 */
			'122114', /* 71 */
			'122411', /* 72 */
			'142112', /* 73 */
			'142211', /* 74 */
			'241211', /* 75 */
			'221114', /* 76 */
			'413111', /* 77 */
			'241112', /* 78 */
			'134111', /* 79 */
			'111242', /* 80 */
			'121142', /* 81 */
			'121241', /* 82 */
			'114212', /* 83 */
			'124112', /* 84 */
			'124211', /* 85 */
			'411212', /* 86 */
			'421112', /* 87 */
			'421211', /* 88 */
			'212141', /* 89 */
			'214121', /* 90 */
			'412121', /* 91 */
			'111143', /* 92 */
			'111341', /* 93 */
			'131141', /* 94 */
			'114113', /* 95 */
			'114311', /* 96 */
			'411113', /* 97 */
			'411311', /* 98 */
			'113141', /* 99 */
			'114131', /* 100 */
			'311141', /* 101 */
			'411131', /* 102 */
			'211412', /* 103 START A */
			'211214', /* 104 START B  */
			'211232', /* 105 START C  */
			'233111', /* STOP */
			'200000'  /* END */
		);
		$keys = '';
		switch(strtoupper($type)) {
			case 'A': {
				$startid = 103;
				$keys = ' !"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_';
				for ($i = 0; $i < 32; ++$i) {
					$keys .= chr($i);
				}
				break;
			}
			case 'B': {
				$startid = 104;
				$keys = ' !"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~'.chr(127);
				break;
			}
			case 'C': {
				$startid = 105;
				$keys = '';
				if ((strlen($code) % 2) != 0) {
					// The length of barcode value must be even ($code). You must pad the number with zeros
					return false;
				}
				for ($i = 0; $i <= 99; ++$i) {
					$keys .= chr($i);
				}
				$new_code = '';
				for ($i = 0; $i < (strlen($code) / 2); ++$i) {
					$new_code .= chr(intval($code{(2 * $i)}.$code{(2 * $i + 1)}));
				}
				$code = $new_code;
				break;
			}
			default: {
				return false;
			}
		}
		// calculate check character
		$sum = $startid;
		$clen = strlen($code);
		for ($i = 0; $i < $clen; ++$i) {
			$sum +=  (strpos($keys, $code{$i}) * ($i+1));
		}
		$check = ($sum % 103);
		// add start, check and stop codes
		$code = chr($startid).$code.chr($check).chr(106).chr(107);
		$bararray = array('code' => $code, 'maxw' => 0, 'maxh' => 1, 'bcode' => array());
		$k = 0;
		$len = strlen($code);
		for ($i = 0; $i < $len; ++$i) {
			$ck = strpos($keys, $code{$i});
			if (($i == 0) OR ($i > ($len-4))) {
				$char_num = ord($code{$i});
				$seq = $chr[$char_num];
			} elseif(($ck >= 0) AND isset($chr[$ck])) {
					$seq = $chr[$ck];
			} else {
				// invalid character
				return false;
			}
			for ($j = 0; $j < 6; ++$j) {
				if (($j % 2) == 0) {
					$t = true; // bar
				} else {
					$t = false; // space
				}
				$w = $seq{$j};
				$bararray['bcode'][$k] = array('t' => $t, 'w' => $w, 'h' => 1, 'p' => 0);
				$bararray['maxw'] += $w;
				++$k;
			}
		}
		return $bararray;		
	}
	
	/**
	 * EAN13 and UPC-A barcodes.
	 * EAN13: European Article Numbering international retail product code
	 * UPC-A: Universal product code seen on almost all retail products in the USA and Canada
	 * UPC-E: Short version of UPC symbol
	 * @param string $code code to represent.
	 * @param string $len barcode type: 6 = UPC-E, 8 = EAN8, 13 = EAN13, 12 = UPC-A
	 * @return array barcode representation.
	 * @access protected
	 */
	protected function barcode_eanupc($code, $len=13) {
		$upce = false;
		if ($len == 6) {
			$len = 12; // UPC-A
			$upce = true; // UPC-E mode
		}
		$data_len = $len - 1;
		//Padding
		$code = str_pad($code, $data_len, '0', STR_PAD_LEFT);
		$code_len = strlen($code);
		// calculate check digit
		$sum_a = 0;
		for ($i = 1; $i < $data_len; $i+=2) {
			$sum_a += $code{$i};
		}
		if ($len > 12) {
			$sum_a *= 3;
		}
		$sum_b = 0;
		for ($i = 0; $i < $data_len; $i+=2) {
			$sum_b += ($code{$i});
		}
		if ($len < 13) {
			$sum_b *= 3;
		}
		$r = ($sum_a + $sum_b) % 10;
		if($r > 0) {
			$r = (10 - $r);
		}
		if ($code_len == $data_len) {
			// add check digit
			$code .= $r;
		} elseif ($r !== intval($code{$data_len})) {
			// wrong checkdigit
			return false;
		}
		if ($len == 12) {
			// UPC-A
			$code = '0'.$code;
			++$len;
		}
		if ($upce) {
			// convert UPC-A to UPC-E
			$tmp = substr($code, 4, 3);
			if (($tmp == '000') OR ($tmp == '100') OR ($tmp == '200')) {
				// manufacturer code ends in 000, 100, or 200
				$upce_code = substr($code, 2, 2).substr($code, 9, 3).substr($code, 4, 1);
			} else {
				$tmp = substr($code, 5, 2);
				if ($tmp == '00') {
					// manufacturer code ends in 00
					$upce_code = substr($code, 2, 3).substr($code, 10, 2).'3';
				} else {
					$tmp = substr($code, 6, 1);
					if ($tmp == '0') {
						// manufacturer code ends in 0
						$upce_code = substr($code, 2, 4).substr($code, 11, 1).'4';
					} else {
						// manufacturer code does not end in zero
						$upce_code = substr($code, 2, 5).substr($code, 11, 1);
					}
				}
			}
		}
		//Convert digits to bars
		$codes = array(
			'A'=>array( // left odd parity
				'0'=>'0001101',
				'1'=>'0011001',
				'2'=>'0010011',
				'3'=>'0111101',
				'4'=>'0100011',
				'5'=>'0110001',
				'6'=>'0101111',
				'7'=>'0111011',
				'8'=>'0110111',
				'9'=>'0001011'),
			'B'=>array( // left even parity
				'0'=>'0100111',
				'1'=>'0110011',
				'2'=>'0011011',
				'3'=>'0100001',
				'4'=>'0011101',
				'5'=>'0111001',
				'6'=>'0000101',
				'7'=>'0010001',
				'8'=>'0001001',
				'9'=>'0010111'),
			'C'=>array( // right
				'0'=>'1110010',
				'1'=>'1100110',
				'2'=>'1101100',
				'3'=>'1000010',
				'4'=>'1011100',
				'5'=>'1001110',
				'6'=>'1010000',
				'7'=>'1000100',
				'8'=>'1001000',
				'9'=>'1110100')
		);
		$parities = array(
			'0'=>array('A','A','A','A','A','A'),
			'1'=>array('A','A','B','A','B','B'),
			'2'=>array('A','A','B','B','A','B'),
			'3'=>array('A','A','B','B','B','A'),
			'4'=>array('A','B','A','A','B','B'),
			'5'=>array('A','B','B','A','A','B'),
			'6'=>array('A','B','B','B','A','A'),
			'7'=>array('A','B','A','B','A','B'),
			'8'=>array('A','B','A','B','B','A'),
			'9'=>array('A','B','B','A','B','A')
		);
		$upce_parities = array();
		$upce_parities[0] = array(
			'0'=>array('B','B','B','A','A','A'),
			'1'=>array('B','B','A','B','A','A'),
			'2'=>array('B','B','A','A','B','A'),
			'3'=>array('B','B','A','A','A','B'),
			'4'=>array('B','A','B','B','A','A'),
			'5'=>array('B','A','A','B','B','A'),
			'6'=>array('B','A','A','A','B','B'),
			'7'=>array('B','A','B','A','B','A'),
			'8'=>array('B','A','B','A','A','B'),
			'9'=>array('B','A','A','B','A','B')
		);
		$upce_parities[1] = array(
			'0'=>array('A','A','A','B','B','B'),
			'1'=>array('A','A','B','A','B','B'),
			'2'=>array('A','A','B','B','A','B'),
			'3'=>array('A','A','B','B','B','A'),
			'4'=>array('A','B','A','A','B','B'),
			'5'=>array('A','B','B','A','A','B'),
			'6'=>array('A','B','B','B','A','A'),
			'7'=>array('A','B','A','B','A','B'),
			'8'=>array('A','B','A','B','B','A'),
			'9'=>array('A','B','B','A','B','A')
		);
		$k = 0;
		$seq = '101'; // left guard bar
		if ($upce) {
			$bararray = array('code' => $upce_code, 'maxw' => 0, 'maxh' => 1, 'bcode' => array());
			$p = $upce_parities[$code{1}][$r];
			for ($i = 0; $i < 6; ++$i) {
				$seq .= $codes[$p[$i]][$upce_code{$i}];
			}
			$seq .= '010101'; // right guard bar
		} else {
			$bararray = array('code' => $code, 'maxw' => 0, 'maxh' => 1, 'bcode' => array());
			$half_len = ceil($len / 2);
			if ($len == 8) {
				for ($i = 0; $i < $half_len; ++$i) {
					$seq .= $codes['A'][$code{$i}];
				}
			} else {
				$p = $parities[$code{0}];
				for ($i = 1; $i < $half_len; ++$i) {
					$seq .= $codes[$p[$i-1]][$code{$i}];
				}
			}
			$seq .= '01010'; // center guard bar
			for ($i = $half_len; $i < $len; ++$i) {
				$seq .= $codes['C'][$code{$i}];
			}
			$seq .= '101'; // right guard bar
		}
		$clen = strlen($seq);
		$w = 0;
		for ($i = 0; $i < $clen; ++$i) {
			$w += 1;
			if (($i == ($clen - 1)) OR (($i < ($clen - 1)) AND ($seq{$i} != $seq{($i+1)}))) {
				if ($seq{$i} == '1') {
					$t = true; // bar
				} else {
					$t = false; // space
				}
				$bararray['bcode'][$k] = array('t' => $t, 'w' => $w, 'h' => 1, 'p' => 0);
				$bararray['maxw'] += $w;
				++$k;
				$w = 0;
			}
		}
		return $bararray;
	}
	
	/**
	 * UPC-Based Extentions
	 * 2-Digit Ext.: Used to indicate magazines and newspaper issue numbers
	 * 5-Digit Ext.: Used to mark suggested retail price of books
	 * @param string $code code to represent.
	 * @param string $len barcode type: 2 = 2-Digit, 5 = 5-Digit
	 * @return array barcode representation.
	 * @access protected
	 */
	protected function barcode_eanext($code, $len=5) {
		//Padding
		$code = str_pad($code, $len, '0', STR_PAD_LEFT);
		// calculate check digit
		if ($len == 2) {
			$r = $code % 4;
		} elseif ($len == 5) {
			$r = (3 * ($code{0} + $code{2} + $code{4})) + (9 * ($code{1} + $code{3}));
			$r %= 10;
		} else {
			return false;
		}
		//Convert digits to bars
		$codes = array(
			'A'=>array( // left odd parity
				'0'=>'0001101',
				'1'=>'0011001',
				'2'=>'0010011',
				'3'=>'0111101',
				'4'=>'0100011',
				'5'=>'0110001',
				'6'=>'0101111',
				'7'=>'0111011',
				'8'=>'0110111',
				'9'=>'0001011'),
			'B'=>array( // left even parity
				'0'=>'0100111',
				'1'=>'0110011',
				'2'=>'0011011',
				'3'=>'0100001',
				'4'=>'0011101',
				'5'=>'0111001',
				'6'=>'0000101',
				'7'=>'0010001',
				'8'=>'0001001',
				'9'=>'0010111')
		);
		$parities = array();
		$parities[2] = array(
			'0'=>array('A','A'),
			'1'=>array('A','B'),
			'2'=>array('B','A'),
			'3'=>array('B','B')
		);
		$parities[5] = array(
			'0'=>array('B','B','A','A','A'),
			'1'=>array('B','A','B','A','A'),
			'2'=>array('B','A','A','B','A'),
			'3'=>array('B','A','A','A','B'),
			'4'=>array('A','B','B','A','A'),
			'5'=>array('A','A','B','B','A'),
			'6'=>array('A','A','A','B','B'),
			'7'=>array('A','B','A','B','A'),
			'8'=>array('A','B','A','A','B'),
			'9'=>array('A','A','B','A','B')
		);	
		$p = $parities[$len][$r];
		$seq = '1011'; // left guard bar
		$seq .= $codes[$p[0]][$code{0}];
		for ($i = 1; $i < $len; ++$i) {
			$seq .= '01'; // separator
			$seq .= $codes[$p[$i]][$code{$i}];
		}
		$bararray = array('code' => $code, 'maxw' => 0, 'maxh' => 1, 'bcode' => array());
		return $this->binseq_to_array($seq, $bararray);
	}
	
	/**
	 * POSTNET and PLANET barcodes.
	 * Used by U.S. Postal Service for automated mail sorting
	 * @param string $code zip code to represent. Must be a string containing a zip code of the form DDDDD or DDDDD-DDDD.
	 * @param boolean $planet if true print the PLANET barcode, otherwise print POSTNET
	 * @return array barcode representation.
	 * @access protected
	 */
	protected function barcode_postnet($code, $planet=false) {
		// bar lenght
		if ($planet) {
			$barlen = Array(
				0 => Array(1,1,2,2,2),
				1 => Array(2,2,2,1,1),
				2 => Array(2,2,1,2,1),
				3 => Array(2,2,1,1,2),
				4 => Array(2,1,2,2,1),
				5 => Array(2,1,2,1,2),
				6 => Array(2,1,1,2,2),
				7 => Array(1,2,2,2,1),
				8 => Array(1,2,2,1,2),
				9 => Array(1,2,1,2,2)
			);
		} else {
			$barlen = Array(
				0 => Array(2,2,1,1,1),
				1 => Array(1,1,1,2,2),
				2 => Array(1,1,2,1,2),
				3 => Array(1,1,2,2,1),
				4 => Array(1,2,1,1,2),
				5 => Array(1,2,1,2,1),
				6 => Array(1,2,2,1,1),
				7 => Array(2,1,1,1,2),
				8 => Array(2,1,1,2,1),
				9 => Array(2,1,2,1,1)
			);
		}
		$bararray = array('code' => $code, 'maxw' => 0, 'maxh' => 2, 'bcode' => array());
		$k = 0;
		$code = str_replace('-', '', $code);
		$code = str_replace(' ', '', $code);
		$len = strlen($code);
		// calculate checksum
		$sum = 0;
		for ($i = 0; $i < $len; ++$i) {
			$sum += intval($code{$i});
		}
		$chkd = ($sum % 10);
		if($chkd > 0) {
			$chkd = (10 - $chkd);
		}
		$code .= $chkd;
		$len = strlen($code);
		// start bar
		$bararray['bcode'][$k++] = array('t' => 1, 'w' => 1, 'h' => 2, 'p' => 0);
		$bararray['bcode'][$k++] = array('t' => 0, 'w' => 1, 'h' => 2, 'p' => 0);
		$bararray['maxw'] += 2;
		for ($i = 0; $i < $len; ++$i) {
			for ($j = 0; $j < 5; ++$j) {
				$h = $barlen[$code{$i}][$j];
				$p = floor(1 / $h);
				$bararray['bcode'][$k++] = array('t' => 1, 'w' => 1, 'h' => $h, 'p' => $p);
				$bararray['bcode'][$k++] = array('t' => 0, 'w' => 1, 'h' => 2, 'p' => 0);
				$bararray['maxw'] += 2;
			}
		}
		// end bar
		$bararray['bcode'][$k++] = array('t' => 1, 'w' => 1, 'h' => 2, 'p' => 0);
		$bararray['maxw'] += 1;
		return $bararray;
	}
	
	/**
	 * RMS4CC - CBC - KIX
	 * RMS4CC (Royal Mail 4-state Customer Code) - CBC (Customer Bar Code) - KIX (Klant index - Customer index)
	 * RM4SCC is the name of the barcode symbology used by the Royal Mail for its Cleanmail service.
	 * @param string $code code to print
	 * @param boolean $kix if true prints the KIX variation (doesn't use the start and end symbols, and the checksum) - in this case the house number must be sufficed with an X and placed at the end of the code.
	 * @return array barcode representation.
	 * @access protected
	 */
	protected function barcode_rms4cc($code, $kix=false) {
		$notkix = !$kix;
		// bar mode
		// 1 = pos 1, length 2
		// 2 = pos 1, length 3
		// 3 = pos 2, length 1
		// 4 = pos 2, length 2
		$barmode = array(
			'0' => array(3,3,2,2),
			'1' => array(3,4,1,2),
			'2' => array(3,4,2,1),
			'3' => array(4,3,1,2),
			'4' => array(4,3,2,1),
			'5' => array(4,4,1,1),
			'6' => array(3,1,4,2),
			'7' => array(3,2,3,2),
			'8' => array(3,2,4,1),
			'9' => array(4,1,3,2),
			'A' => array(4,1,4,1),
			'B' => array(4,2,3,1),
			'C' => array(3,1,2,4),
			'D' => array(3,2,1,4),
			'E' => array(3,2,2,3),
			'F' => array(4,1,1,4),
			'G' => array(4,1,2,3),
			'H' => array(4,2,1,3),
			'I' => array(1,3,4,2),
			'J' => array(1,4,3,2),
			'K' => array(1,4,4,1),
			'L' => array(2,3,3,2),
			'M' => array(2,3,4,1),
			'N' => array(2,4,3,1),
			'O' => array(1,3,2,4),
			'P' => array(1,4,1,4),
			'Q' => array(1,4,2,3),
			'R' => array(2,3,1,4),
			'S' => array(2,3,2,3),
			'T' => array(2,4,1,3),
			'U' => array(1,1,4,4),
			'V' => array(1,2,3,4),
			'W' => array(1,2,4,3),
			'X' => array(2,1,3,4),
			'Y' => array(2,1,4,3),
			'Z' => array(2,2,3,3)		
		);
		$code = strtoupper($code);
		$len = strlen($code);
		$bararray = array('code' => $code, 'maxw' => 0, 'maxh' => 3, 'bcode' => array());
		if ($notkix) {
			// table for checksum calculation (row,col)
			$checktable = array(
				'0' => array(1,1),
				'1' => array(1,2),
				'2' => array(1,3),
				'3' => array(1,4),
				'4' => array(1,5),
				'5' => array(1,0),
				'6' => array(2,1),
				'7' => array(2,2),
				'8' => array(2,3),
				'9' => array(2,4),
				'A' => array(2,5),
				'B' => array(2,0),
				'C' => array(3,1),
				'D' => array(3,2),
				'E' => array(3,3),
				'F' => array(3,4),
				'G' => array(3,5),
				'H' => array(3,0),
				'I' => array(4,1),
				'J' => array(4,2),
				'K' => array(4,3),
				'L' => array(4,4),
				'M' => array(4,5),
				'N' => array(4,0),
				'O' => array(5,1),
				'P' => array(5,2),
				'Q' => array(5,3),
				'R' => array(5,4),
				'S' => array(5,5),
				'T' => array(5,0),
				'U' => array(0,1),
				'V' => array(0,2),
				'W' => array(0,3),
				'X' => array(0,4),
				'Y' => array(0,5),
				'Z' => array(0,0)
			);
			$row = 0;
			$col = 0;
			for ($i = 0; $i < $len; ++$i) {
				$row += $checktable[$code{$i}][0];
				$col += $checktable[$code{$i}][1];
			}
			$row %= 6;
			$col %= 6;
			$chk = array_keys($checktable, array($row,$col));
			$code .= $chk[0];
			++$len;
		}
		$k = 0;
		if ($notkix) {
			// start bar
			$bararray['bcode'][$k++] = array('t' => 1, 'w' => 1, 'h' => 2, 'p' => 0);
			$bararray['bcode'][$k++] = array('t' => 0, 'w' => 1, 'h' => 2, 'p' => 0);
			$bararray['maxw'] += 2;
		}
		for ($i = 0; $i < $len; ++$i) {
			for ($j = 0; $j < 4; ++$j) {
				switch ($barmode[$code{$i}][$j]) {
					case 1: {
						$p = 0;
						$h = 2;
						break;
					}
					case 2: {
						$p = 0;
						$h = 3;
						break;
					}
					case 3: {
						$p = 1;
						$h = 1;
						break;
					}
					case 4: {
						$p = 1;
						$h = 2;
						break;
					}
				}
				$bararray['bcode'][$k++] = array('t' => 1, 'w' => 1, 'h' => $h, 'p' => $p);
				$bararray['bcode'][$k++] = array('t' => 0, 'w' => 1, 'h' => 2, 'p' => 0);
				$bararray['maxw'] += 2;
			}
		}
		if ($notkix) {
			// stop bar
			$bararray['bcode'][$k++] = array('t' => 1, 'w' => 1, 'h' => 3, 'p' => 0);
			$bararray['maxw'] += 1;
		}
		return $bararray;
	}
	
	/**
	 * CODABAR barcodes.
	 * Older code often used in library systems, sometimes in blood banks
	 * @param string $code code to represent.
	 * @return array barcode representation.
	 * @access protected
	 */
	protected function barcode_codabar($code) {
		$chr = array(
			'0' => '11111221',
			'1' => '11112211',
			'2' => '11121121',
			'3' => '22111111',
			'4' => '11211211',
			'5' => '21111211',
			'6' => '12111121',
			'7' => '12112111',
			'8' => '12211111',
			'9' => '21121111',
			'-' => '11122111',
			'$' => '11221111',
			':' => '21112121',
			'/' => '21211121',
			'.' => '21212111',
			'+' => '11222221',
			'A' => '11221211',
			'B' => '12121121',
			'C' => '11121221',
			'D' => '11122211'
		);
		$bararray = array('code' => $code, 'maxw' => 0, 'maxh' => 1, 'bcode' => array());
		$k = 0;
		$w = 0;
		$seq = '';
		$code = 'A'.strtoupper($code).'A';
		$len = strlen($code);
		for ($i = 0; $i < $len; ++$i) {
			if (!isset($chr[$code{$i}])) {
				return false;
			}
			$seq = $chr[$code{$i}];
			for ($j = 0; $j < 8; ++$j) {
				if (($j % 2) == 0) {
					$t = true; // bar
				} else {
					$t = false; // space
				}
				$w = $seq{$j};
				$bararray['bcode'][$k] = array('t' => $t, 'w' => $w, 'h' => 1, 'p' => 0);
				$bararray['maxw'] += $w;
				++$k;
			}
		}
		return $bararray;
	}
	
	/**
	 * CODE11 barcodes.
	 * Used primarily for labeling telecommunications equipment
	 * @param string $code code to represent.
	 * @return array barcode representation.
	 * @access protected
	 */
	protected function barcode_code11($code) {
		$chr = array(
			'0' => '111121',
			'1' => '211121',
			'2' => '121121',
			'3' => '221111',
			'4' => '112121',
			'5' => '212111',
			'6' => '122111',
			'7' => '111221',
			'8' => '211211',
			'9' => '211111',
			'-' => '112111',
			'S' => '112211'
		);
		
		$bararray = array('code' => $code, 'maxw' => 0, 'maxh' => 1, 'bcode' => array());
		$k = 0;
		$w = 0;
		$seq = '';
		$len = strlen($code);
		// calculate check digit C
		$p = 1;
		$check = 0;
		for ($i = ($len - 1); $i >= 0; --$i) {
			$digit = $code{$i};
			if ($digit == '-') {
				$dval = 10;
			} else {
				$dval = intval($digit);
			}
			$check += ($dval * $p);
			++$p;
			if ($p > 10) {
				$p = 1;
			}
		}
		$check %= 11;
		if ($check == 10) {
			$check = '-';
		} 
		$code .= $check;
		if ($len > 10) {
			// calculate check digit K
			$p = 1;
			$check = 0;
			for ($i = $len; $i >= 0; --$i) {
				$digit = $code{$i};
				if ($digit == '-') {
					$dval = 10;
				} else {
					$dval = intval($digit);
				}
				$check += ($dval * $p);
				++$p;
				if ($p > 9) {
					$p = 1;
				}
			}
			$check %= 11;
			$code .= $check;
			++$len;
		}
		$code = 'S'.$code.'S';
		$len += 3;
		for ($i = 0; $i < $len; ++$i) {
			if (!isset($chr[$code{$i}])) {
				return false;
			}
			$seq = $chr[$code{$i}];
			for ($j = 0; $j < 6; ++$j) {
				if (($j % 2) == 0) {
					$t = true; // bar
				} else {
					$t = false; // space
				}
				$w = $seq{$j};
				$bararray['bcode'][$k] = array('t' => $t, 'w' => $w, 'h' => 1, 'p' => 0);
				$bararray['maxw'] += $w;
				++$k;
			}
		}
		return $bararray;
	}
	
	/**
	 * Pharmacode
	 * Contains digits (0 to 9)
	 * @param string $code code to represent.
	 * @return array barcode representation.
	 * @access protected
	 */
	protected function barcode_pharmacode($code) {
		$seq = '';
		$code = intval($code);
		while ($code > 0) {
			if (($code % 2) == 0) {
				$seq .= '11100';
				$code -= 2;
			} else {
				$seq .= '100';
				$code -= 1;
			}
			$code /= 2;
		}
		$seq = substr($seq, 0, -2);
		$seq = strrev($seq);
		$bararray = array('code' => $code, 'maxw' => 0, 'maxh' => 1, 'bcode' => array());
		return $this->binseq_to_array($seq, $bararray);
	}
	
	/**
	 * Pharmacode two-track
	 * Contains digits (0 to 9)
	 * @param string $code code to represent.
	 * @return array barcode representation.
	 * @access protected
	 */
	protected function barcode_pharmacode2t($code) {
		$seq = '';
		$code = intval($code);
		do {
			switch ($code % 3) {
				case 0: {
					$seq .= '3';
					$code = ($code - 3) / 3;
					break;
				}
				case 1: {
					$seq .= '1';
					$code = ($code - 1) / 3;
					break;
				}
				case 2: {
					$seq .= '2';
					$code = ($code - 2) / 3;
					break;
				}
			}
		} while($code != 0);
		$seq = strrev($seq);
		$k = 0;
		$bararray = array('code' => $code, 'maxw' => 0, 'maxh' => 2, 'bcode' => array());
		$len = strlen($seq);
		for ($i = 0; $i < $len; ++$i) {
			switch ($seq{$i}) {
				case '1': {
					$p = 1;
					$h = 1;
					break;
				}
				case '2': {
					$p = 0;
					$h = 1;
					break;
				}
				case '3': {
					$p = 0;
					$h = 2;
					break;
				}
			}
			$bararray['bcode'][$k++] = array('t' => 1, 'w' => 1, 'h' => $h, 'p' => $p);
			$bararray['bcode'][$k++] = array('t' => 0, 'w' => 1, 'h' => 2, 'p' => 0);
			$bararray['maxw'] += 2;
		}
		unset($bararray['bcode'][($k - 1)]);
		--$bararray['maxw'];
		return $bararray;
	}
} // end of class

//============================================================+
// END OF FILE                                                 
//============================================================+
?>