PHP8 Compatible code

[jplevene]

The curly braces to index a character no longer works so the following code works in PHP7 & PHP8 (not checked in PHP5.4). This replaces the file BarcodeGenereator.php

`<?php

/**

• General PHP Barcode Generator
• @author Casper Bakker - picqer.com
• Based on TCPDF Barcode Generator */

// Copyright (C) 2002-2015 Nicola Asuni - Tecnick.com LTD // // This file is part of TCPDF software library. // // TCPDF 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 3 of the // License, or (at your option) any later version. // // TCPDF 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 License // along with TCPDF. If not, see // http://www.tecnick.com/pagefiles/tcpdf/LICENSE.TXT. // // See LICENSE.TXT file for more information.

namespace Picqer\Barcode;

use Picqer\Barcode\Exceptions\BarcodeException; use Picqer\Barcode\Exceptions\InvalidCharacterException; use Picqer\Barcode\Exceptions\InvalidCheckDigitException; use Picqer\Barcode\Exceptions\InvalidFormatException; use Picqer\Barcode\Exceptions\InvalidLengthException; use Picqer\Barcode\Exceptions\UnknownTypeException;

abstract class BarcodeGenerator { const TYPE_CODE_39 = 'C39'; const TYPE_CODE_39_CHECKSUM = 'C39+'; const TYPE_CODE_39E = 'C39E'; const TYPE_CODE_39E_CHECKSUM = 'C39E+'; const TYPE_CODE_93 = 'C93'; const TYPE_STANDARD_2_5 = 'S25'; const TYPE_STANDARD_2_5_CHECKSUM = 'S25+'; const TYPE_INTERLEAVED_2_5 = 'I25'; const TYPE_INTERLEAVED_2_5_CHECKSUM = 'I25+'; const TYPE_CODE_128 = 'C128'; const TYPE_CODE_128_A = 'C128A'; const TYPE_CODE_128_B = 'C128B'; const TYPE_CODE_128_C = 'C128C'; const TYPE_EAN_2 = 'EAN2'; const TYPE_EAN_5 = 'EAN5'; const TYPE_EAN_8 = 'EAN8'; const TYPE_EAN_13 = 'EAN13'; const TYPE_UPC_A = 'UPCA'; const TYPE_UPC_E = 'UPCE'; const TYPE_MSI = 'MSI'; const TYPE_MSI_CHECKSUM = 'MSI+'; const TYPE_POSTNET = 'POSTNET'; const TYPE_PLANET = 'PLANET'; const TYPE_RMS4CC = 'RMS4CC'; const TYPE_KIX = 'KIX'; const TYPE_IMB = 'IMB'; const TYPE_CODABAR = 'CODABAR'; const TYPE_CODE_11 = 'CODE11'; const TYPE_PHARMA_CODE = 'PHARMA'; const TYPE_PHARMA_CODE_TWO_TRACKS = 'PHARMA2T';

/**
 * Get the barcode data
 *
 * @param string $code code to print
 * @param string $type type of barcode
 * @return array barcode array
 * @public
 */
protected function getBarcodeData($code, $type)
{
    switch (strtoupper($type)) {
        case self::TYPE_CODE_39: { // CODE 39 - ANSI MH10.8M-1983 - USD-3 - 3 of 9.
            $arrcode = $this->barcode_code39($code, false, false);
            break;
        }
        case self::TYPE_CODE_39_CHECKSUM: { // CODE 39 with checksum
            $arrcode = $this->barcode_code39($code, false, true);
            break;
        }
        case self::TYPE_CODE_39E: { // CODE 39 EXTENDED
            $arrcode = $this->barcode_code39($code, true, false);
            break;
        }
        case self::TYPE_CODE_39E_CHECKSUM: { // CODE 39 EXTENDED + CHECKSUM
            $arrcode = $this->barcode_code39($code, true, true);
            break;
        }
        case self::TYPE_CODE_93: { // CODE 93 - USS-93
            $arrcode = $this->barcode_code93($code);
            break;
        }
        case self::TYPE_STANDARD_2_5: { // Standard 2 of 5
            $arrcode = $this->barcode_s25($code, false);
            break;
        }
        case self::TYPE_STANDARD_2_5_CHECKSUM: { // Standard 2 of 5 + CHECKSUM
            $arrcode = $this->barcode_s25($code, true);
            break;
        }
        case self::TYPE_INTERLEAVED_2_5: { // Interleaved 2 of 5
            $arrcode = $this->barcode_i25($code, false);
            break;
        }
        case self::TYPE_INTERLEAVED_2_5_CHECKSUM: { // Interleaved 2 of 5 + CHECKSUM
            $arrcode = $this->barcode_i25($code, true);
            break;
        }
        case self::TYPE_CODE_128: { // CODE 128
            $arrcode = $this->barcode_c128($code, '');
            break;
        }
        case self::TYPE_CODE_128_A: { // CODE 128 A
            $arrcode = $this->barcode_c128($code, 'A');
            break;
        }
        case self::TYPE_CODE_128_B: { // CODE 128 B
            $arrcode = $this->barcode_c128($code, 'B');
            break;
        }
        case self::TYPE_CODE_128_C: { // CODE 128 C
            $arrcode = $this->barcode_c128($code, 'C');
            break;
        }
        case self::TYPE_EAN_2: { // 2-Digits UPC-Based Extention
            $arrcode = $this->barcode_eanext($code, 2);
            break;
        }
        case self::TYPE_EAN_5: { // 5-Digits UPC-Based Extention
            $arrcode = $this->barcode_eanext($code, 5);
            break;
        }
        case self::TYPE_EAN_8: { // EAN 8
            $arrcode = $this->barcode_eanupc($code, 8);
            break;
        }
        case self::TYPE_EAN_13: { // EAN 13
            $arrcode = $this->barcode_eanupc($code, 13);
            break;
        }
        case self::TYPE_UPC_A: { // UPC-A
            $arrcode = $this->barcode_eanupc($code, 12);
            break;
        }
        case self::TYPE_UPC_E: { // UPC-E
            $arrcode = $this->barcode_eanupc($code, 6);
            break;
        }
        case self::TYPE_MSI: { // MSI (Variation of Plessey code)
            $arrcode = $this->barcode_msi($code, false);
            break;
        }
        case self::TYPE_MSI_CHECKSUM: { // MSI + CHECKSUM (modulo 11)
            $arrcode = $this->barcode_msi($code, true);
            break;
        }
        case self::TYPE_POSTNET: { // POSTNET
            $arrcode = $this->barcode_postnet($code, false);
            break;
        }
        case self::TYPE_PLANET: { // PLANET
            $arrcode = $this->barcode_postnet($code, true);
            break;
        }
        case self::TYPE_RMS4CC: { // RMS4CC (Royal Mail 4-state Customer Code) - CBC (Customer Bar Code)
            $arrcode = $this->barcode_rms4cc($code, false);
            break;
        }
        case self::TYPE_KIX: { // KIX (Klant index - Customer index)
            $arrcode = $this->barcode_rms4cc($code, true);
            break;
        }
        case self::TYPE_IMB: { // IMB - Intelligent Mail Barcode - Onecode - USPS-B-3200
            $arrcode = $this->barcode_imb($code);
            break;
        }
        case self::TYPE_CODABAR: { // CODABAR
            $arrcode = $this->barcode_codabar($code);
            break;
        }
        case self::TYPE_CODE_11: { // CODE 11
            $arrcode = $this->barcode_code11($code);
            break;
        }
        case self::TYPE_PHARMA_CODE: { // PHARMACODE
            $arrcode = $this->barcode_pharmacode($code);
            break;
        }
        case self::TYPE_PHARMA_CODE_TWO_TRACKS: { // PHARMACODE TWO-TRACKS
            $arrcode = $this->barcode_pharmacode2t($code);
            break;
        }
        default: {
            throw new UnknownTypeException();
            break;
        }
    }

    if ( ! isset($arrcode['maxWidth'])) {
        $arrcode = $this->convertBarcodeArrayToNewStyle($arrcode);
    }

    return $arrcode;
}

/**
 * CODE 39 - ANSI MH10.8M-1983 - USD-3 - 3 of 9.
 * General-purpose code in very wide use world-wide
 *
 * @param $code (string) code to represent.
 * @param $extended (boolean) if true uses the extended mode.
 * @param $checksum (boolean) if true add a checksum to the code.
 * @return array barcode representation.
 * @protected
 */
protected function barcode_code39($code, $extended = false, $checksum = false)
{
    $chr = [];
    $chr['0'] = '111331311';
    $chr['1'] = '311311113';
    $chr['2'] = '113311113';
    $chr['3'] = '313311111';
    $chr['4'] = '111331113';
    $chr['5'] = '311331111';
    $chr['6'] = '113331111';
    $chr['7'] = '111311313';
    $chr['8'] = '311311311';
    $chr['9'] = '113311311';
    $chr['A'] = '311113113';
    $chr['B'] = '113113113';
    $chr['C'] = '313113111';
    $chr['D'] = '111133113';
    $chr['E'] = '311133111';
    $chr['F'] = '113133111';
    $chr['G'] = '111113313';
    $chr['H'] = '311113311';
    $chr['I'] = '113113311';
    $chr['J'] = '111133311';
    $chr['K'] = '311111133';
    $chr['L'] = '113111133';
    $chr['M'] = '313111131';
    $chr['N'] = '111131133';
    $chr['O'] = '311131131';
    $chr['P'] = '113131131';
    $chr['Q'] = '111111333';
    $chr['R'] = '311111331';
    $chr['S'] = '113111331';
    $chr['T'] = '111131331';
    $chr['U'] = '331111113';
    $chr['V'] = '133111113';
    $chr['W'] = '333111111';
    $chr['X'] = '131131113';
    $chr['Y'] = '331131111';
    $chr['Z'] = '133131111';
    $chr['-'] = '131111313';
    $chr['.'] = '331111311';
    $chr[' '] = '133111311';
    $chr['$'] = '131313111';
    $chr['/'] = '131311131';
    $chr['+'] = '131113131';
    $chr['%'] = '111313131';
    $chr['*'] = '131131311';

    $code = strtoupper($code);

    if ($extended) {
        // extended mode
        $code = $this->encode_code39_ext($code);
    }

    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])) {
            throw new InvalidCharacterException('Char ' . $char . ' is unsupported');
        }
        for ($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;
        }
        // intercharacter gap
        $bararray['bcode'][$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 $code code to represent.
 * @return bool|string encoded string.
 * @protected
 */
protected function encode_code39_ext($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)  => '$J',
        chr(11)  => '£K',
        chr(12)  => '$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) {
            throw new InvalidCharacterException('Only supports till char 127');
        }
        $code_ext .= $encode[$code[$i]];
    }

    return $code_ext;
}

/**
 * Calculate CODE 39 checksum (modulo 43).
 *
 * @param string $code code to represent.
 * @return string char checksum.
 * @protected
 */
protected function checksum_code39($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;
    $codelength = strlen($code);
    for ($i = 0; $i < $codelength; ++$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 $code (string) code to represent.
 * @return array barcode representation.
 * @protected
 */
protected function barcode_code93($code)
{
    $chr = [];
    $chr[48] = '131112'; // 0
    $chr[49] = '111213'; // 1
    $chr[50] = '111312'; // 2
    $chr[51] = '111411'; // 3
    $chr[52] = '121113'; // 4
    $chr[53] = '121212'; // 5
    $chr[54] = '121311'; // 6
    $chr[55] = '111114'; // 7
    $chr[56] = '131211'; // 8
    $chr[57] = '141111'; // 9
    $chr[65] = '211113'; // A
    $chr[66] = '211212'; // B
    $chr[67] = '211311'; // C
    $chr[68] = '221112'; // D
    $chr[69] = '221211'; // E
    $chr[70] = '231111'; // F
    $chr[71] = '112113'; // G
    $chr[72] = '112212'; // H
    $chr[73] = '112311'; // I
    $chr[74] = '122112'; // J
    $chr[75] = '132111'; // K
    $chr[76] = '111123'; // L
    $chr[77] = '111222'; // M
    $chr[78] = '111321'; // N
    $chr[79] = '121122'; // O
    $chr[80] = '131121'; // P
    $chr[81] = '212112'; // Q
    $chr[82] = '212211'; // R
    $chr[83] = '211122'; // S
    $chr[84] = '211221'; // T
    $chr[85] = '221121'; // U
    $chr[86] = '222111'; // V
    $chr[87] = '112122'; // W
    $chr[88] = '112221'; // X
    $chr[89] = '122121'; // Y
    $chr[90] = '123111'; // Z
    $chr[45] = '121131'; // -
    $chr[46] = '311112'; // .
    $chr[32] = '311211'; //
    $chr[36] = '321111'; // $
    $chr[47] = '112131'; // /
    $chr[43] = '113121'; // +
    $chr[37] = '211131'; // %
    $chr[128] = '121221'; // ($)
    $chr[129] = '311121'; // (/)
    $chr[130] = '122211'; // (+)
    $chr[131] = '312111'; // (%)
    $chr[42] = '111141'; // start-stop
    $code = strtoupper($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)  => '£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) {
            throw new InvalidCharacterException('Only supports till char 127');
        }
        $code_ext .= $encode[$code[$i]];
    }
    // checksum
    $code_ext .= $this->checksum_code93($code_ext);
    // add start and stop codes
    $code = '*' . $code_ext . '*';
    $bararray = array('code' => $code, 'maxw' => 0, 'maxh' => 1, 'bcode' => array());
    $k = 0;
    $clen = strlen($code);
    for ($i = 0; $i < $clen; ++$i) {
        $char = ord($code[$i]);
        if ( ! isset($chr[$char])) {
            throw new InvalidCharacterException('Char ' . $char . ' is unsupported');
        }
        for ($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;

    return $bararray;
}

/**
 * Calculate CODE 93 checksum (modulo 47).
 *
 * @param $code (string) code to represent.
 * @return string checksum code.
 * @protected
 */
protected function checksum_code93($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(131) . chr(129) . chr(130), '<=>?');
    $len = strlen($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];
    $checksum = $c . $k;
    // resto respecial characters
    $checksum = strtr($checksum, '<=>?', chr(128) . chr(131) . chr(129) . chr(130));

    return $checksum;
}

/**
 * Checksum for standard 2 of 5 barcodes.
 *
 * @param $code (string) code to process.
 * @return int checksum.
 * @protected
 */
protected function checksum_s25($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 $code (string) code to represent.
 * @param $checksum (boolean) if true add a checksum to the code (modulo 11)
 * @return array barcode representation.
 * @protected
 */
protected function barcode_msi($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])) {
            throw new InvalidCharacterException('Char ' . $digit . ' is unsupported');
        }
        $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 $code (string) code to represent.
 * @param $checksum (boolean) if true add a checksum to the code
 * @return array barcode representation.
 * @protected
 */
protected function barcode_s25($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])) {
            throw new InvalidCharacterException('Char ' . $digit . ' is unsupported');
        }
        $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 $seq (string) barcode as binary sequence.
 * @param $bararray (array) barcode array.
 * òparam array $bararray TCPDF barcode array to fill up
 * @return array barcode representation.
 * @protected
 */
protected function binseq_to_array($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 $code (string) code to represent.
 * @param $checksum (boolean) if true add a checksum to the code
 * @return array barcode representation.
 * @protected
 */
protected function barcode_i25($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]) || ! isset($chr[$char_space])) {
            throw new InvalidCharacterException();
        }
        // 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 $code (string) code to represent.
 * @param $type (string) barcode type: A, B, C or empty for automatic switch (AUTO mode)
 * @return array barcode representation.
 * @protected
 */
protected function barcode_c128($code, $type = '')
{
    $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 */
    );
    // ASCII characters for code A (ASCII 00 - 95)
    $keys_a = ' !"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_';
    $keys_a .= chr(0) . chr(1) . chr(2) . chr(3) . chr(4) . chr(5) . chr(6) . chr(7) . chr(8) . chr(9);
    $keys_a .= chr(10) . chr(11) . chr(12) . chr(13) . chr(14) . chr(15) . chr(16) . chr(17) . chr(18) . chr(19);
    $keys_a .= chr(20) . chr(21) . chr(22) . chr(23) . chr(24) . chr(25) . chr(26) . chr(27) . chr(28) . chr(29);
    $keys_a .= chr(30) . chr(31);
    // ASCII characters for code B (ASCII 32 - 127)
    $keys_b = ' !"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~' . chr(127);
    // special codes
    $fnc_a = array(241 => 102, 242 => 97, 243 => 96, 244 => 101);
    $fnc_b = array(241 => 102, 242 => 97, 243 => 96, 244 => 100);
    // array of symbols
    $code_data = array();
    // length of the code
    $len = strlen($code);
    switch (strtoupper($type)) {
        case 'A': { // MODE A
            $startid = 103;
            for ($i = 0; $i < $len; ++$i) {
                $char = $code[$i];
                $char_id = ord($char);
                if (($char_id >= 241) AND ($char_id <= 244)) {
                    $code_data[] = $fnc_a[$char_id];
                } elseif (($char_id >= 0) AND ($char_id <= 95)) {
                    $code_data[] = strpos($keys_a, $char);
                } else {
                    throw new InvalidCharacterException('Char ' . $char . ' is unsupported');
                }
            }
            break;
        }
        case 'B': { // MODE B
            $startid = 104;
            for ($i = 0; $i < $len; ++$i) {
                $char = $code[$i];
                $char_id = ord($char);
                if (($char_id >= 241) AND ($char_id <= 244)) {
                    $code_data[] = $fnc_b[$char_id];
                } elseif (($char_id >= 32) AND ($char_id <= 127)) {
                    $code_data[] = strpos($keys_b, $char);
                } else {
                    throw new InvalidCharacterException('Char ' . $char . ' is unsupported');
                }
            }
            break;
        }
        case 'C': { // MODE C
            $startid = 105;
            if (ord($code[0]) == 241) {
                $code_data[] = 102;
                $code = substr($code, 1);
                --$len;
            }
            if (($len % 2) != 0) {
                throw new InvalidLengthException('Length must be even');
            }
            for ($i = 0; $i < $len; $i += 2) {
                $chrnum = $code[$i] . $code[$i + 1];
                if (preg_match('/([0-9]{2})/', $chrnum) > 0) {
                    $code_data[] = intval($chrnum);
                } else {
                    throw new InvalidCharacterException();
                }
            }
            break;
        }
        default: { // MODE AUTO
            // split code into sequences
            $sequence = array();
            // get numeric sequences (if any)
            $numseq = array();
            preg_match_all('/([0-9]{4,})/', $code, $numseq, PREG_OFFSET_CAPTURE);
            if (isset($numseq[1]) AND ! empty($numseq[1])) {
                $end_offset = 0;
                foreach ($numseq[1] as $val) {
                    $offset = $val[1];

                    // numeric sequence
                    $slen = strlen($val[0]);
                    if (($slen % 2) != 0) {
                        // the length must be even
                        ++$offset;
                        $val[0] = substr($val[0],1);
                    }

                    if ($offset > $end_offset) {
                        // non numeric sequence
                        $sequence = array_merge($sequence,
                            $this->get128ABsequence(substr($code, $end_offset, ($offset - $end_offset))));
                    }
                    // numeric sequence fallback
                    $slen = strlen($val[0]);
                    if (($slen % 2) != 0) {
                        // the length must be even
                        --$slen;
                    }
                    $sequence[] = array('C', substr($code, $offset, $slen), $slen);
                    $end_offset = $offset + $slen;
                }
                if ($end_offset < $len) {
                    $sequence = array_merge($sequence, $this->get128ABsequence(substr($code, $end_offset)));
                }
            } else {
                // text code (non C mode)
                $sequence = array_merge($sequence, $this->get128ABsequence($code));
            }
            // process the sequence
            foreach ($sequence as $key => $seq) {
                switch ($seq[0]) {
                    case 'A': {
                        if ($key == 0) {
                            $startid = 103;
                        } elseif ($sequence[($key - 1)][0] != 'A') {
                            if (($seq[2] == 1) AND ($key > 0) AND ($sequence[($key - 1)][0] == 'B') AND ( ! isset($sequence[($key - 1)][3]))) {
                                // single character shift
                                $code_data[] = 98;
                                // mark shift
                                $sequence[$key][3] = true;
                            } elseif ( ! isset($sequence[($key - 1)][3])) {
                                $code_data[] = 101;
                            }
                        }
                        for ($i = 0; $i < $seq[2]; ++$i) {
                            $char = $seq[1][$i];
                            $char_id = ord($char);
                            if (($char_id >= 241) AND ($char_id <= 244)) {
                                $code_data[] = $fnc_a[$char_id];
                            } else {
                                $code_data[] = strpos($keys_a, $char);
                            }
                        }
                        break;
                    }
                    case 'B': {
                        if ($key == 0) {
                            $tmpchr = ord($seq[1][0]);
                            if (($seq[2] == 1) AND ($tmpchr >= 241) AND ($tmpchr <= 244) AND isset($sequence[($key + 1)]) AND ($sequence[($key + 1)][0] != 'B')) {
                                switch ($sequence[($key + 1)][0]) {
                                    case 'A': {
                                        $startid = 103;
                                        $sequence[$key][0] = 'A';
                                        $code_data[] = $fnc_a[$tmpchr];
                                        break;
                                    }
                                    case 'C': {
                                        $startid = 105;
                                        $sequence[$key][0] = 'C';
                                        $code_data[] = $fnc_a[$tmpchr];
                                        break;
                                    }
                                }
                                break;
                            } else {
                                $startid = 104;
                            }
                        } elseif ($sequence[($key - 1)][0] != 'B') {
                            if (($seq[2] == 1) AND ($key > 0) AND ($sequence[($key - 1)][0] == 'A') AND ( ! isset($sequence[($key - 1)][3]))) {
                                // single character shift
                                $code_data[] = 98;
                                // mark shift
                                $sequence[$key][3] = true;
                            } elseif ( ! isset($sequence[($key - 1)][3])) {
                                $code_data[] = 100;
                            }
                        }
                        for ($i = 0; $i < $seq[2]; ++$i) {
                            $char = $seq[1][$i];
                            $char_id = ord($char);
                            if (($char_id >= 241) AND ($char_id <= 244)) {
                                $code_data[] = $fnc_b[$char_id];
                            } else {
                                $code_data[] = strpos($keys_b, $char);
                            }
                        }
                        break;
                    }
                    case 'C': {
                        if ($key == 0) {
                            $startid = 105;
                        } elseif ($sequence[($key - 1)][0] != 'C') {
                            $code_data[] = 99;
                        }
                        for ($i = 0; $i < $seq[2]; $i += 2) {
                            $chrnum = $seq[1][$i] . $seq[1][$i + 1];
                            $code_data[] = intval($chrnum);
                        }
                        break;
                    }
                }
            }
        }
    }
    // calculate check character
    $sum = $startid;
    foreach ($code_data as $key => $val) {
        $sum += ($val * ($key + 1));
    }
    // add check character
    $code_data[] = ($sum % 103);
    // add stop sequence
    $code_data[] = 106;
    $code_data[] = 107;
    // add start code at the beginning
    array_unshift($code_data, $startid);
    // build barcode array
    $bararray = array('code' => $code, 'maxw' => 0, 'maxh' => 1, 'bcode' => array());
    foreach ($code_data as $val) {
        $seq = $chr[$val];
        for ($j = 0; $j < 6; ++$j) {
            if (($j % 2) == 0) {
                $t = true; // bar
            } else {
                $t = false; // space
            }
            $w = $seq[$j];
            $bararray['bcode'][] = array('t' => $t, 'w' => $w, 'h' => 1, 'p' => 0);
            $bararray['maxw'] += $w;
        }
    }

    return $bararray;
}

/**
 * Split text code in A/B sequence for 128 code
 *
 * @param $code (string) code to split.
 * @return array sequence
 * @protected
 */
protected function get128ABsequence($code)
{
    $len = strlen($code);
    $sequence = array();
    // get A sequences (if any)
    $numseq = array();
    preg_match_all('/([\x00-\x1f])/', $code, $numseq, PREG_OFFSET_CAPTURE);
    if (isset($numseq[1]) AND ! empty($numseq[1])) {
        $end_offset = 0;
        foreach ($numseq[1] as $val) {
            $offset = $val[1];
            if ($offset > $end_offset) {
                // B sequence
                $sequence[] = array(
                    'B',
                    substr($code, $end_offset, ($offset - $end_offset)),
                    ($offset - $end_offset)
                );
            }
            // A sequence
            $slen = strlen($val[0]);
            $sequence[] = array('A', substr($code, $offset, $slen), $slen);
            $end_offset = $offset + $slen;
        }
        if ($end_offset < $len) {
            $sequence[] = array('B', substr($code, $end_offset), ($len - $end_offset));
        }
    } else {
        // only B sequence
        $sequence[] = array('B', $code, $len);
    }

    return $sequence;
}

/**
 * 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 $code (string) code to represent.
 * @param $len (string) barcode type: 6 = UPC-E, 8 = EAN8, 13 = EAN13, 12 = UPC-A
 * @return array barcode representation.
 * @protected
 */
protected function barcode_eanupc($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])) {
        throw new InvalidCheckDigitException();
    }
    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());
        $half_len = intval(ceil($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) {
            if ( ! isset($codes['C'][$code[$i]])) {
                throw new InvalidCharacterException('Char ' . $code[$i] . ' not allowed');
            }
            $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 Extensions
 * 2-Digit Ext.: Used to indicate magazines and newspaper issue numbers
 * 5-Digit Ext.: Used to mark suggested retail price of books
 *
 * @param $code (string) code to represent.
 * @param $len (string) barcode type: 2 = 2-Digit, 5 = 5-Digit
 * @return array barcode representation.
 * @protected
 */
protected function barcode_eanext($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 {
        throw new InvalidCheckDigitException();
    }
    //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 $code (string) zip code to represent. Must be a string containing a zip code of the form DDDDD or
 *     DDDDD-DDDD.
 * @param $planet (boolean) if true print the PLANET barcode, otherwise print POSTNET
 * @return array barcode representation.
 * @protected
 */
protected function barcode_postnet($code, $planet = false)
{
    // bar length
    if ($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 $code (string) code to print
 * @param $kix (boolean) if true prints the KIX variation (doesn't use the start and end symbols, and the checksum)
 *     - in this case the house number must be sufficed with an X and placed at the end of the code.
 * @return array barcode representation.
 * @protected
 */
protected function barcode_rms4cc($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 $code (string) code to represent.
 * @return array barcode representation.
 * @protected
 */
protected function barcode_codabar($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]])) {
            throw new InvalidCharacterException('Char ' . $code[$i] . ' is unsupported');
        }
        $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 $code (string) code to represent.
 * @return array barcode representation.
 * @protected
 */
protected function barcode_code11($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]])) {
            throw new InvalidCharacterException('Char ' . $code[$i] . ' is unsupported');
        }
        $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 $code (string) code to represent.
 * @return array barcode representation.
 * @protected
 */
protected function barcode_pharmacode($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 $code (string) code to represent.
 * @return array barcode representation.
 * @protected
 */
protected function barcode_pharmacode2t($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;
}

/**
 * IMB - Intelligent Mail Barcode - Onecode - USPS-B-3200
 * (requires PHP bcmath extension)
 * Intelligent Mail barcode is a 65-bar code for use on mail in the United States.
 * The fields are described as follows:<ul><li>The Barcode Identifier shall be assigned by USPS to encode the
 * presort identification that is currently printed in human readable form on the optional endorsement line (OEL)
 * as well as for future USPS use. This shall be two digits, with the second digit in the range of 0–4. The
 * allowable encoding ranges shall be 00–04, 10–14, 20–24, 30–34, 40–44, 50–54, 60–64, 70–74, 80–84, and
 * 90–94.</li><li>The Service Type Identifier shall be assigned by USPS for any combination of services requested
 * on the mailpiece. The allowable encoding range shall be 000http://it2.php.net/manual/en/function.dechex.php–999.
 * Each 3-digit value shall correspond to a particular mail class with a particular combination of service(s). Each
 * service program, such as OneCode Confirm and OneCode ACS, shall provide the list of Service Type Identifier
 * values.</li><li>The Mailer or Customer Identifier shall be assigned by USPS as a unique, 6 or 9 digit number
 * that identifies a business entity. The allowable encoding range for the 6 digit Mailer ID shall be 000000-
 * 899999, while the allowable encoding range for the 9 digit Mailer ID shall be 900000000-999999999.</li><li>The
 * Serial or Sequence Number shall be assigned by the mailer for uniquely identifying and tracking mailpieces. The
 * allowable encoding range shall be 000000000–999999999 when used with a 6 digit Mailer ID and 000000-999999 when
 * used with a 9 digit Mailer ID. e. The Delivery Point ZIP Code shall be assigned by the mailer for routing the
 * mailpiece. This shall replace POSTNET for routing the mailpiece to its final delivery point. The length may be
 * 0, 5, 9, or 11 digits. The allowable encoding ranges shall be no ZIP Code, 00000–99999,  000000000–999999999,
 * and 00000000000–99999999999.</li></ul>
 *
 * @param $code (string) code to print, separate the ZIP (routing code) from the rest using a minus char '-'
 *     (BarcodeID_ServiceTypeID_MailerID_SerialNumber-RoutingCode)
 * @return array barcode representation.
 * @protected
 */
protected function barcode_imb($code)
{
    $asc_chr = array(
        4,
        0,
        2,
        6,
        3,
        5,
        1,
        9,
        8,
        7,
        1,
        2,
        0,
        6,
        4,
        8,
        2,
        9,
        5,
        3,
        0,
        1,
        3,
        7,
        4,
        6,
        8,
        9,
        2,
        0,
        5,
        1,
        9,
        4,
        3,
        8,
        6,
        7,
        1,
        2,
        4,
        3,
        9,
        5,
        7,
        8,
        3,
        0,
        2,
        1,
        4,
        0,
        9,
        1,
        7,
        0,
        2,
        4,
        6,
        3,
        7,
        1,
        9,
        5,
        8
    );
    $dsc_chr = array(
        7,
        1,
        9,
        5,
        8,
        0,
        2,
        4,
        6,
        3,
        5,
        8,
        9,
        7,
        3,
        0,
        6,
        1,
        7,
        4,
        6,
        8,
        9,
        2,
        5,
        1,
        7,
        5,
        4,
        3,
        8,
        7,
        6,
        0,
        2,
        5,
        4,
        9,
        3,
        0,
        1,
        6,
        8,
        2,
        0,
        4,
        5,
        9,
        6,
        7,
        5,
        2,
        6,
        3,
        8,
        5,
        1,
        9,
        8,
        7,
        4,
        0,
        2,
        6,
        3
    );
    $asc_pos = array(
        3,
        0,
        8,
        11,
        1,
        12,
        8,
        11,
        10,
        6,
        4,
        12,
        2,
        7,
        9,
        6,
        7,
        9,
        2,
        8,
        4,
        0,
        12,
        7,
        10,
        9,
        0,
        7,
        10,
        5,
        7,
        9,
        6,
        8,
        2,
        12,
        1,
        4,
        2,
        0,
        1,
        5,
        4,
        6,
        12,
        1,
        0,
        9,
        4,
        7,
        5,
        10,
        2,
        6,
        9,
        11,
        2,
        12,
        6,
        7,
        5,
        11,
        0,
        3,
        2
    );
    $dsc_pos = array(
        2,
        10,
        12,
        5,
        9,
        1,
        5,
        4,
        3,
        9,
        11,
        5,
        10,
        1,
        6,
        3,
        4,
        1,
        10,
        0,
        2,
        11,
        8,
        6,
        1,
        12,
        3,
        8,
        6,
        4,
        4,
        11,
        0,
        6,
        1,
        9,
        11,
        5,
        3,
        7,
        3,
        10,
        7,
        11,
        8,
        2,
        10,
        3,
        5,
        8,
        0,
        3,
        12,
        11,
        8,
        4,
        5,
        1,
        3,
        0,
        7,
        12,
        9,
        8,
        10
    );
    $code_arr = explode('-', $code);
    $tracking_number = $code_arr[0];
    if (isset($code_arr[1])) {
        $routing_code = $code_arr[1];
    } else {
        $routing_code = '';
    }
    // Conversion of Routing Code
    switch (strlen($routing_code)) {
        case 0: {
            $binary_code = 0;
            break;
        }
        case 5: {
            $binary_code = bcadd($routing_code, '1');
            break;
        }
        case 9: {
            $binary_code = bcadd($routing_code, '100001');
            break;
        }
        case 11: {
            $binary_code = bcadd($routing_code, '1000100001');
            break;
        }
        default: {
            throw new BarcodeException('Routing code unknown');
            break;
        }
    }
    $binary_code = bcmul($binary_code, 10);
    $binary_code = bcadd($binary_code, $tracking_number[0]);
    $binary_code = bcmul($binary_code, 5);
    $binary_code = bcadd($binary_code, $tracking_number[1]);
    $binary_code .= substr($tracking_number, 2, 18);
    // convert to hexadecimal
    $binary_code = $this->dec_to_hex($binary_code);
    // pad to get 13 bytes
    $binary_code = str_pad($binary_code, 26, '0', STR_PAD_LEFT);
    // convert string to array of bytes
    $binary_code_arr = chunk_split($binary_code, 2, "\r");
    $binary_code_arr = substr($binary_code_arr, 0, -1);
    $binary_code_arr = explode("\r", $binary_code_arr);
    // calculate frame check sequence
    $fcs = $this->imb_crc11fcs($binary_code_arr);
    // exclude first 2 bits from first byte
    $first_byte = sprintf('%2s', dechex((hexdec($binary_code_arr[0]) << 2) >> 2));
    $binary_code_102bit = $first_byte . substr($binary_code, 2);
    // convert binary data to codewords
    $codewords = array();
    $data = $this->hex_to_dec($binary_code_102bit);
    $codewords[0] = bcmod($data, 636) * 2;
    $data = bcdiv($data, 636);
    for ($i = 1; $i < 9; ++$i) {
        $codewords[$i] = bcmod($data, 1365);
        $data = bcdiv($data, 1365);
    }
    $codewords[9] = $data;
    if (($fcs >> 10) == 1) {
        $codewords[9] += 659;
    }
    // generate lookup tables
    $table2of13 = $this->imb_tables(2, 78);
    $table5of13 = $this->imb_tables(5, 1287);
    // convert codewords to characters
    $characters = array();
    $bitmask = 512;
    foreach ($codewords as $k => $val) {
        if ($val <= 1286) {
            $chrcode = $table5of13[$val];
        } else {
            $chrcode = $table2of13[($val - 1287)];
        }
        if (($fcs & $bitmask) > 0) {
            // bitwise invert
            $chrcode = ((~$chrcode) & 8191);
        }
        $characters[] = $chrcode;
        $bitmask /= 2;
    }
    $characters = array_reverse($characters);
    // build bars
    $k = 0;
    $bararray = array('code' => $code, 'maxw' => 0, 'maxh' => 3, 'bcode' => array());
    for ($i = 0; $i < 65; ++$i) {
        $asc = (($characters[$asc_chr[$i]] & pow(2, $asc_pos[$i])) > 0);
        $dsc = (($characters[$dsc_chr[$i]] & pow(2, $dsc_pos[$i])) > 0);
        if ($asc AND $dsc) {
            // full bar (F)
            $p = 0;
            $h = 3;
        } elseif ($asc) {
            // ascender (A)
            $p = 0;
            $h = 2;
        } elseif ($dsc) {
            // descender (D)
            $p = 1;
            $h = 2;
        } else {
            // tracker (T)
            $p = 1;
            $h = 1;
        }
        $bararray['bcode'][$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;
}

/**
 * IMB - Intelligent Mail Barcode - Onecode - USPS-B-3200
 *
 * @param $code (string) pre-formatted IMB barcode (65 chars "FADT")
 * @return array barcode representation.
 * @protected
 */
protected function barcode_imb_pre($code)
{
    if ( ! preg_match('/^[fadtFADT]{65}$/', $code) == 1) {
        throw new InvalidFormatException();
    }
    $characters = str_split(strtolower($code), 1);
    // build bars
    $k = 0;
    $bararray = array('code' => $code, 'maxw' => 0, 'maxh' => 3, 'bcode' => array());
    for ($i = 0; $i < 65; ++$i) {
        switch ($characters[$i]) {
            case 'f': {
                // full bar
                $p = 0;
                $h = 3;
                break;
            }
            case 'a': {
                // ascender
                $p = 0;
                $h = 2;
                break;
            }
            case 'd': {
                // descender
                $p = 1;
                $h = 2;
                break;
            }
            case 't': {
                // tracker (short)
                $p = 1;
                $h = 1;
                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;
}

/**
 * Convert large integer number to hexadecimal representation.
 * (requires PHP bcmath extension)
 *
 * @param $number (string) number to convert specified as a string
 * @return string hexadecimal representation
 */
protected function dec_to_hex($number)
{
    if ($number == 0) {
        return '00';
    }

    $hex = [];

    while ($number > 0) {
        array_push($hex, strtoupper(dechex(bcmod($number, '16'))));
        $number = bcdiv($number, '16', 0);
    }
    $hex = array_reverse($hex);

    return implode($hex);
}

/**
 * Convert large hexadecimal number to decimal representation (string).
 * (requires PHP bcmath extension)
 *
 * @param $hex (string) hexadecimal number to convert specified as a string
 * @return string hexadecimal representation
 */
protected function hex_to_dec($hex)
{
    $dec = 0;
    $bitval = 1;
    $len = strlen($hex);
    for ($pos = ($len - 1); $pos >= 0; --$pos) {
        $dec = bcadd($dec, bcmul(hexdec($hex[$pos]), $bitval));
        $bitval = bcmul($bitval, 16);
    }

    return $dec;
}

/**
 * Intelligent Mail Barcode calculation of Frame Check Sequence
 *
 * @param $code_arr (string) array of hexadecimal values (13 bytes holding 102 bits right justified).
 * @return int 11 bit Frame Check Sequence as integer (decimal base)
 * @protected
 */
protected function imb_crc11fcs($code_arr)
{
    $genpoly = 0x0F35; // generator polynomial
    $fcs = 0x07FF; // Frame Check Sequence
    // do most significant byte skipping the 2 most significant bits
    $data = hexdec($code_arr[0]) << 5;
    for ($bit = 2; $bit < 8; ++$bit) {
        if (($fcs ^ $data) & 0x400) {
            $fcs = ($fcs << 1) ^ $genpoly;
        } else {
            $fcs = ($fcs << 1);
        }
        $fcs &= 0x7FF;
        $data <<= 1;
    }
    // do rest of bytes
    for ($byte = 1; $byte < 13; ++$byte) {
        $data = hexdec($code_arr[$byte]) << 3;
        for ($bit = 0; $bit < 8; ++$bit) {
            if (($fcs ^ $data) & 0x400) {
                $fcs = ($fcs << 1) ^ $genpoly;
            } else {
                $fcs = ($fcs << 1);
            }
            $fcs &= 0x7FF;
            $data <<= 1;
        }
    }

    return $fcs;
}

/**
 * Reverse unsigned short value
 *
 * @param $num (int) value to reversr
 * @return int reversed value
 * @protected
 */
protected function imb_reverse_us($num)
{
    $rev = 0;
    for ($i = 0; $i < 16; ++$i) {
        $rev <<= 1;
        $rev |= ($num & 1);
        $num >>= 1;
    }

    return $rev;
}

/**
 * generate Nof13 tables used for Intelligent Mail Barcode
 *
 * @param $n (int) is the type of table: 2 for 2of13 table, 5 for 5of13table
 * @param $size (int) size of table (78 for n=2 and 1287 for n=5)
 * @return array requested table
 * @protected
 */
protected function imb_tables($n, $size)
{
    $table = array();
    $lli = 0; // LUT lower index
    $lui = $size - 1; // LUT upper index
    for ($count = 0; $count < 8192; ++$count) {
        $bit_count = 0;
        for ($bit_index = 0; $bit_index < 13; ++$bit_index) {
            $bit_count += intval(($count & (1 << $bit_index)) != 0);
        }
        // if we don't have the right number of bits on, go on to the next value
        if ($bit_count == $n) {
            $reverse = ($this->imb_reverse_us($count) >> 3);
            // if the reverse is less than count, we have already visited this pair before
            if ($reverse >= $count) {
                // If count is symmetric, place it at the first free slot from the end of the list.
                // Otherwise, place it at the first free slot from the beginning of the list AND place $reverse ath the next free slot from the beginning of the list
                if ($reverse == $count) {
                    $table[$lui] = $count;
                    --$lui;
                } else {
                    $table[$lli] = $count;
                    ++$lli;
                    $table[$lli] = $reverse;
                    ++$lli;
                }
            }
        }
    }

    return $table;
}

protected function convertBarcodeArrayToNewStyle($oldBarcodeArray)
{
    $newBarcodeArray = [];
    $newBarcodeArray['code'] = $oldBarcodeArray['code'];
    $newBarcodeArray['maxWidth'] = $oldBarcodeArray['maxw'];
    $newBarcodeArray['maxHeight'] = $oldBarcodeArray['maxh'];
    $newBarcodeArray['bars'] = [];
    foreach ($oldBarcodeArray['bcode'] as $oldbar) {
        $newBar = [];
        $newBar['width'] = $oldbar['w'];
        $newBar['height'] = $oldbar['h'];
        $newBar['positionVertical'] = $oldbar['p'];
        $newBar['drawBar'] = $oldbar['t'];
        $newBar['drawSpacing'] = ! $oldbar['t'];

        $newBarcodeArray['bars'][] = $newBar;
    }

    return $newBarcodeArray;
}

} `

[jplevene]

Looking at this, to be honest it would probably be safer to use mb_substr or substr.

Not sure which barcodes support multibyte chars as this code seems only to support single byte upto chr(127), but using $string[$index] will not get the entire char for UTF8 strings as it will only get one byte and not the 2 bytes used to make up the character

[casperbakker]

It looks like you are using a very old version of this library. Please update to the latest version, which works and is tested on PHP 8.