qrcode

Complexity

Total Complexity

389

Size/Duplication

Total Lines	2872
Duplicated Lines	0 %

Importance

Changes	1
Bugs	0	Features	0

98 Methods

Rating	Name	Duplication	Size	Complexity
A	rsBlockNum2()	0	3	1
A	mask7()	0	3	1
A	encodeModeNum()	0	23	4
B	check()	0	27	7
A	eatKanji()	0	9	2
A	mask3()	0	3	1
B	getNextPosition()	0	48	11
A	newInputItem()	0	16	3
A	lookAnTable()	0	3	2
A	appendNum()	0	8	2
A	lengthIndicator()	0	14	4
B	init()	0	47	5
A	getFormatInfo()	0	10	5
A	appendNewInputItem()	0	5	1
A	getEccSpec()	0	24	3
B	bitstreamToByte()	0	29	6
A	binarize()	0	11	4
A	newFromNum()	0	14	3
A	encode_rs_char()	0	35	5
A	encodeString()	0	11	3
A	calcParity()	0	12	4
A	qrstrset()	0	5	3
A	getCode()	0	19	4
A	getBarcodeArray()	0	3	1
D	init_rs_char()	0	78	19
B	putAlignmentPattern()	0	36	7
A	allocate()	0	3	1
A	encodeModeKanji()	0	18	3
A	rsBlockNum1()	0	3	1
A	appendBitstream()	0	10	4
A	generateMaskNo()	0	15	5
C	calcN1N3()	0	25	15
A	putAlignmentMarker()	0	16	2
D	evaluateSymbol()	0	55	17
A	encodeModeAn()	0	17	3
A	rsDataCodes2()	0	3	1
A	mask2()	0	3	1
A	isdigitat()	0	7	3
B	lengthOfCode()	0	50	11
A	getBitStream()	0	5	1
A	encodeModeStructure()	0	9	1
B	checkModeKanji()	0	13	7
A	getByteStream()	0	5	1
A	getDataLength()	0	3	1
B	eatAn()	0	35	7
A	mergeBitStream()	0	9	2
A	rsDataCodes1()	0	3	1
A	maximumWords()	0	19	5
A	convertData()	0	24	6
A	getWidth()	0	3	1
A	checkModeNum()	0	9	4
B	encodeBitStream()	0	41	7
A	getFrameAt()	0	3	1
B	splitString()	0	36	9
B	estimateBitStreamSize()	0	38	8
B	init_rs()	0	14	8
A	estimateBitsModeKanji()	0	3	1
A	insertStructuredAppendHeader()	0	13	4
A	getRemainder()	0	3	1
A	rsEccCodes2()	0	3	1
A	estimateVersion()	0	14	3
A	newFromBytes()	0	18	4
A	mask5()	0	3	1
A	makeMask()	0	7	1
A	mask4()	0	3	1
B	writeFormatInformation()	0	36	7
A	getMinimumVersion()	0	10	3
A	estimateBitsModeNum()	0	19	3
B	identifyMode()	0	21	10
A	appendBytes()	0	8	2
A	toUpper()	0	17	5
A	rsBlockNum()	0	3	1
A	mask1()	0	3	1
A	mask()	0	32	5
B	encodeMask()	0	55	9
A	checkModeAn()	0	9	3
A	modnn()	0	8	2
A	getVersionPattern()	0	7	3
A	createBitStream()	0	10	2
A	newFrame()	0	13	5
A	mask6()	0	3	1
B	eatNum()	0	28	6
B	createFrame()	0	60	9
A	appendPaddingBit()	0	25	6
A	getECCLength()	0	3	1
C	__construct()	0	32	12
A	rsEccLength()	0	3	1
A	mask0()	0	3	1
A	setFrameAt()	0	3	1
A	makeMaskNo()	0	19	5
A	rsDataLength()	0	3	1
A	estimateBitsModeAn()	0	9	2
A	rsEccCodes1()	0	3	1
A	putFinderPattern()	0	16	2
A	encodeMode8()	0	10	2
A	estimateBitsMode8()	0	3	1
A	isalnumat()	0	7	2
B	eat8()	0	45	9

<?php

//============================================================+
// File name   : qrcode.php
// Begin       : 2010-03-22
// Last Update : 2010-03-29
// Version     : 1.0.002
// License     : GNU LGPL v.3 (http://www.gnu.org/copyleft/lesser.html)
// 	----------------------------------------------------------------------------
//
// 	This library 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 any later version.
//
// 	This library 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 library; if not, write to the Free Software
// 	Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
//  or browse http://www.gnu.org/copyleft/lesser.html
//
//  ----------------------------------------------------------------------------
//
// DESCRIPTION :
//
// Class to create QR-code arrays for TCPDF class.
// QR Code symbol is a 2D barcode that can be scanned by
// handy terminals such as a mobile phone with CCD.
// The capacity of QR Code is up to 7000 digits or 4000
// characters, and has high robustness.
// This class supports QR Code model 2, described in
// JIS (Japanese Industrial Standards) X0510:2004
// or ISO/IEC 18004.
// Currently the following features are not supported:
// ECI and FNC1 mode, Micro QR Code, QR Code model 1,
// Structured mode.
//
// This class is derived from the following projects:
// ---------------------------------------------------------
// "PHP QR Code encoder"
// License: GNU-LGPLv3
// Copyright (C) 2010 by Dominik Dzienia <deltalab at poczta dot fm>
// http://phpqrcode.sourceforge.net/
// https://sourceforge.net/projects/phpqrcode/
//
// The "PHP QR Code encoder" is based on
// "C libqrencode library" (ver. 3.1.1)
// License: GNU-LGPL 2.1
// Copyright (C) 2006-2010 by Kentaro Fukuchi
// http://megaui.net/fukuchi/works/qrencode/index.en.html
//
// Reed-Solomon code encoder is written by Phil Karn, KA9Q.
// Copyright (C) 2002-2006 Phil Karn, KA9Q
//
// QR Code is registered trademark of DENSO WAVE INCORPORATED
// http://www.denso-wave.com/qrcode/index-e.html
// ---------------------------------------------------------
//
// Author: Nicola Asuni
//
// (c) Copyright 2010:
//               Nicola Asuni
//               Tecnick.com S.r.l.
//               Via della Pace, 11
//               09044 Quartucciu (CA)
//               ITALY
//               www.tecnick.com
//               info@tecnick.com
//============================================================+

/**
 * Class to create QR-code arrays for TCPDF class.
 * QR Code symbol is a 2D barcode that can be scanned by handy terminals such as a mobile phone with CCD.
 * The capacity of QR Code is up to 7000 digits or 4000 characters, and has high robustness.
 * This class supports QR Code model 2, described in JIS (Japanese Industrial Standards) X0510:2004 or ISO/IEC 18004.
 * Currently the following features are not supported: ECI and FNC1 mode, Micro QR Code, QR Code model 1, Structured mode.
 *
 * This class is derived from "PHP QR Code encoder" by Dominik Dzienia (http://phpqrcode.sourceforge.net/) based on "libqrencode C library 3.1.1." by Kentaro Fukuchi (http://megaui.net/fukuchi/works/qrencode/index.en.html), contains Reed-Solomon code written by Phil Karn, KA9Q. QR Code is registered trademark of DENSO WAVE INCORPORATED (http://www.denso-wave.com/qrcode/index-e.html).
 * Please read comments on this class source file for full copyright and license information.
 *
 * @abstract Class for generating QR-code array for TCPDF.
 *
 * @author Nicola Asuni
 * @copyright 2010 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 1.0.002
 */

// definitions
if (!defined('QRCODEDEFS')) {

    /*
     * Indicate that definitions for this class are set
     */
    define('QRCODEDEFS', true);

    // -----------------------------------------------------

    // Encoding modes (characters which can be encoded in QRcode)

    /*
     * Encoding mode
     */
    define('QR_MODE_NL', -1);

    /*
     * Encoding mode numeric (0-9). 3 characters are encoded to 10bit length. In theory, 7089 characters or less can be stored in a QRcode.
     */
    define('QR_MODE_NM', 0);

    /*
     * Encoding mode alphanumeric (0-9A-Z $%*+-./:) 45characters. 2 characters are encoded to 11bit length. In theory, 4296 characters or less can be stored in a QRcode.
     */
    define('QR_MODE_AN', 1);

    /*
     * Encoding mode 8bit byte data. In theory, 2953 characters or less can be stored in a QRcode.
     */
    define('QR_MODE_8B', 2);

    /*
     * Encoding mode KANJI. A KANJI character (multibyte character) is encoded to 13bit length. In theory, 1817 characters or less can be stored in a QRcode.
     */
    define('QR_MODE_KJ', 3);

    /*
     * Encoding mode STRUCTURED (currently unsupported)
     */
    define('QR_MODE_ST', 4);

    // -----------------------------------------------------

    // Levels of error correction.
    // QRcode has a function of an error correcting for miss reading that white is black.
    // Error correcting is defined in 4 level as below.

    /*
     * Error correction level L : About 7% or less errors can be corrected.
     */
    define('QR_ECLEVEL_L', 0);

    /*
     * Error correction level M : About 15% or less errors can be corrected.
     */
    define('QR_ECLEVEL_M', 1);

    /*
     * Error correction level Q : About 25% or less errors can be corrected.
     */
    define('QR_ECLEVEL_Q', 2);

    /*
     * Error correction level H : About 30% or less errors can be corrected.
     */
    define('QR_ECLEVEL_H', 3);

    // -----------------------------------------------------

    // Version. Size of QRcode is defined as version.
    // Version is from 1 to 40.
    // Version 1 is 21*21 matrix. And 4 modules increases whenever 1 version increases.
    // So version 40 is 177*177 matrix.

    /*
     * Maximum QR Code version.
     */
    define('QRSPEC_VERSION_MAX', 40);

    /*
     * Maximum matrix size for maximum version (version 40 is 177*177 matrix).
     */
    define('QRSPEC_WIDTH_MAX', 177);

    // -----------------------------------------------------

    /*
     * Matrix index to get width from $capacity array.
     */
    define('QRCAP_WIDTH', 0);

    /*
     * Matrix index to get number of words from $capacity array.
     */
    define('QRCAP_WORDS', 1);

    /*
     * Matrix index to get remainder from $capacity array.
     */
    define('QRCAP_REMINDER', 2);

    /*
     * Matrix index to get error correction level from $capacity array.
     */
    define('QRCAP_EC', 3);

    // -----------------------------------------------------

    // Structure (currently usupported)

    /*
     * Number of header bits for structured mode
     */
    define('STRUCTURE_HEADER_BITS', 20);

    /*
     * Max number of symbols for structured mode
     */
    define('MAX_STRUCTURED_SYMBOLS', 16);

    // -----------------------------------------------------

    // Masks

    /*
     * Down point base value for case 1 mask pattern (concatenation of same color in a line or a column)
     */
    define('N1', 3);

    /*
     * Down point base value for case 2 mask pattern (module block of same color)
     */
    define('N2', 3);

    /*
     * Down point base value for case 3 mask pattern (1:1:3:1:1(dark:bright:dark:bright:dark)pattern in a line or a column)
     */
    define('N3', 40);

    /*
     * Down point base value for case 4 mask pattern (ration of dark modules in whole)
     */
    define('N4', 10);

    // -----------------------------------------------------

    // Optimization settings

    /*
     * if true, estimates best mask (spec. default, but extremally slow; set to false to significant performance boost but (propably) worst quality code
     */
    define('QR_FIND_BEST_MASK', true);

    /*
     * if false, checks all masks available, otherwise value tells count of masks need to be checked, mask id are got randomly
     */
    define('QR_FIND_FROM_RANDOM', 2);

    /*
     * when QR_FIND_BEST_MASK === false
     */
    define('QR_DEFAULT_MASK', 2);

    // -----------------------------------------------------
} // end of definitions

// #*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#

if (!class_exists('QRcode', false)) {

    // for compaibility with PHP4
    if (!function_exists('str_split')) {
        /**
         * Convert a string to an array (needed for PHP4 compatibility).
         *
         * @param string $string       The input string.
         * @param int    $split_length Maximum length of the chunk.
         *
         * @return If the optional split_length  parameter is specified, the returned array will be broken down into chunks with each being split_length  in length, otherwise each chunk will be one character in length. FALSE is returned if split_length is less than 1. If the split_length length exceeds the length of string , the entire string is returned as the first (and only) array element.

The type If was not found. Maybe you did not declare it correctly or list all dependencies?

         */
        function str_split($string, $split_length = 1)
        {
            if ((strlen($string) > $split_length) or (!$split_length)) {
                do {
                    $c = strlen($string);

The assignment to $c is dead and can be removed.

                    $parts[] = substr($string, 0, $split_length);
                    $string = substr($string, $split_length);
                } while ($string !== false);
            } else {
                $parts = [$string];
            }

            return $parts;

The variable $parts does not seem to be defined for all execution paths leading up to this point.

        }
    }

    // #####################################################

    /**
     * Class to create QR-code arrays for TCPDF class.
     * QR Code symbol is a 2D barcode that can be scanned by handy terminals such as a mobile phone with CCD.
     * The capacity of QR Code is up to 7000 digits or 4000 characters, and has high robustness.
     * This class supports QR Code model 2, described in JIS (Japanese Industrial Standards) X0510:2004 or ISO/IEC 18004.
     * Currently the following features are not supported: ECI and FNC1 mode, Micro QR Code, QR Code model 1, Structured mode.
     *
     * This class is derived from "PHP QR Code encoder" by Dominik Dzienia (http://phpqrcode.sourceforge.net/) based on "libqrencode C library 3.1.1." by Kentaro Fukuchi (http://megaui.net/fukuchi/works/qrencode/index.en.html), contains Reed-Solomon code written by Phil Karn, KA9Q. QR Code is registered trademark of DENSO WAVE INCORPORATED (http://www.denso-wave.com/qrcode/index-e.html).
     * Please read comments on this class source file for full copyright and license information.
     *
     * @name QRcode
     * @abstract Class for generating QR-code array for TCPDF.
     *
     * @author Nicola Asuni
     * @copyright 2010 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 1.0.002
     */
    class qrcode
    {
        /**
         * @var barcode array to be returned which is readable by TCPDF

The type barcode was not found. Maybe you did not declare it correctly or list all dependencies?

         */
        protected $barcode_array = [];

        /**
         * @var QR code version. Size of QRcode is defined as version. Version is from 1 to 40. Version 1 is 21*21 matrix. And 4 modules increases whenever 1 version increases. So version 40 is 177*177 matrix.
         */
        protected $version = 0;

        /**
         * @var Levels of error correction. See definitions for possible values.

The type Levels was not found. Maybe you did not declare it correctly or list all dependencies?

         */
        protected $level = QR_ECLEVEL_L;

        /**
         * @var Encoding mode

The type Encoding was not found. Maybe you did not declare it correctly or list all dependencies?

         */
        protected $hint = QR_MODE_8B;

        /**
         * @var if true the input string will be converted to uppercase

The type if was not found. Maybe you did not declare it correctly or list all dependencies?

         */
        protected $casesensitive = true;

        /**
         * @var structured QR code (not supported yet)

The type structured was not found. Maybe you did not declare it correctly or list all dependencies?

         */
        protected $structured = 0;

        /**
         * @var mask data

The type mask was not found. Maybe you did not declare it correctly or list all dependencies?

         */
        protected $data;

        // FrameFiller

        /**
         * @var width

The type width was not found. Maybe you did not declare it correctly or list all dependencies?

         */
        protected $width;

        /**
         * @var frame
         */
        protected $frame;

        /**
         * @var X position of bit
         */
        protected $x;

        /**
         * @var Y position of bit
         */
        protected $y;

        /**
         * @var direction

The type direction was not found. Maybe you did not declare it correctly or list all dependencies?

         */
        protected $dir;

        /**
         * @var single bit

The type single was not found. Maybe you did not declare it correctly or list all dependencies?

         */
        protected $bit;

        // ---- QRrawcode ----

        /**
         * @var data code

The type data was not found. Maybe you did not declare it correctly or list all dependencies?

         */
        protected $datacode = [];

        /**
         * @var error correction code
         */
        protected $ecccode = [];

        /**
         * @var blocks

The type blocks was not found. Maybe you did not declare it correctly or list all dependencies?

         */
        protected $blocks;

        /**
         * @var Reed-Solomon blocks

The doc comment Reed-Solomon at position 0 could not be parsed: Unknown type name 'Reed-Solomon' at position 0 in Reed-Solomon.

         */
        protected $rsblocks = []; //of RSblock

        /**
         * @var counter

The type counter was not found. Maybe you did not declare it correctly or list all dependencies?

         */
        protected $count;

        /**
         * @var data length
         */
        protected $dataLength;

        /**
         * @var error correction length
         */
        protected $eccLength;

        /**
         * @var b1

The type b1 was not found. Maybe you did not declare it correctly or list all dependencies?

         */
        protected $b1;

        // ---- QRmask ----

        /**
         * @var run length
         */
        protected $runLength = [];

        // ---- QRsplit ----

        /**
         * @var input data string

The type input was not found. Maybe you did not declare it correctly or list all dependencies?

         */
        protected $dataStr = '';

        /**
         * @var input items
         */
        protected $items;

        // Reed-Solomon items

        /**
         * @var Reed-Solomon items

The doc comment Reed-Solomon at position 0 could not be parsed: Unknown type name 'Reed-Solomon' at position 0 in Reed-Solomon.

         */
        protected $rsitems = [];

        /**
         * @var array of frames
         */
        protected $frames = [];

        /**
         * @var alphabet-numeric convesion table

The doc comment alphabet-numeric at position 0 could not be parsed: Unknown type name 'alphabet-numeric' at position 0 in alphabet-numeric.

         */
        protected $anTable = [
            -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, //
            -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, //
            36, -1, -1, -1, 37, 38, -1, -1, -1, -1, 39, 40, -1, 41, 42, 43, //
                0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 44, -1, -1, -1, -1, -1, //
            -1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, //
            25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, -1, -1, -1, -1, -1, //
            -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, //
            -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, //
            ];

        /**
         * @var array Table of the capacity of symbols
         *            See Table 1 (pp.13) and Table 12-16 (pp.30-36), JIS X0510:2004.
         */
        protected $capacity = [
            [0, 0, 0, [0, 0, 0, 0]], //
            [21, 26, 0, [7, 10, 13, 17]], //  1
            [25, 44, 7, [10, 16, 22, 28]], //
            [29, 70, 7, [15, 26, 36, 44]], //
            [33, 100, 7, [20, 36, 52, 64]], //
            [37, 134, 7, [26, 48, 72, 88]], //  5
            [41, 172, 7, [36, 64, 96, 112]], //
            [45, 196, 0, [40, 72, 108, 130]], //
            [49, 242, 0, [48, 88, 132, 156]], //
            [53, 292, 0, [60, 110, 160, 192]], //
            [57, 346, 0, [72, 130, 192, 224]], // 10
            [61, 404, 0, [80, 150, 224, 264]], //
            [65, 466, 0, [96, 176, 260, 308]], //
            [69, 532, 0, [104, 198, 288, 352]], //
            [73, 581, 3, [120, 216, 320, 384]], //
            [77, 655, 3, [132, 240, 360, 432]], // 15
            [81, 733, 3, [144, 280, 408, 480]], //
            [85, 815, 3, [168, 308, 448, 532]], //
            [89, 901, 3, [180, 338, 504, 588]], //
            [93, 991, 3, [196, 364, 546, 650]], //
            [97, 1085, 3, [224, 416, 600, 700]], // 20
            [101, 1156, 4, [224, 442, 644, 750]], //
            [105, 1258, 4, [252, 476, 690, 816]], //
            [109, 1364, 4, [270, 504, 750, 900]], //
            [113, 1474, 4, [300, 560, 810, 960]], //
            [117, 1588, 4, [312, 588, 870, 1050]], // 25
            [121, 1706, 4, [336, 644, 952, 1110]], //
            [125, 1828, 4, [360, 700, 1020, 1200]], //
            [129, 1921, 3, [390, 728, 1050, 1260]], //
            [133, 2051, 3, [420, 784, 1140, 1350]], //
            [137, 2185, 3, [450, 812, 1200, 1440]], // 30
            [141, 2323, 3, [480, 868, 1290, 1530]], //
            [145, 2465, 3, [510, 924, 1350, 1620]], //
            [149, 2611, 3, [540, 980, 1440, 1710]], //
            [153, 2761, 3, [570, 1036, 1530, 1800]], //
            [157, 2876, 0, [570, 1064, 1590, 1890]], // 35
            [161, 3034, 0, [600, 1120, 1680, 1980]], //
            [165, 3196, 0, [630, 1204, 1770, 2100]], //
            [169, 3362, 0, [660, 1260, 1860, 2220]], //
            [173, 3532, 0, [720, 1316, 1950, 2310]], //
            [177, 3706, 0, [750, 1372, 2040, 2430]], // 40
        ];

        /**
         * @var array Length indicator
         */
        protected $lengthTableBits = [
            [10, 12, 14],
            [9, 11, 13],
            [8, 16, 16],
            [8, 10, 12],
        ];

        /**
         * @var array Table of the error correction code (Reed-Solomon block)
         *            See Table 12-16 (pp.30-36), JIS X0510:2004.
         */
        protected $eccTable = [
            [[0, 0], [0, 0], [0, 0], [0, 0]], //
            [[1, 0], [1, 0], [1, 0], [1, 0]], //  1
            [[1, 0], [1, 0], [1, 0], [1, 0]], //
            [[1, 0], [1, 0], [2, 0], [2, 0]], //
            [[1, 0], [2, 0], [2, 0], [4, 0]], //
            [[1, 0], [2, 0], [2, 2], [2, 2]], //  5
            [[2, 0], [4, 0], [4, 0], [4, 0]], //
            [[2, 0], [4, 0], [2, 4], [4, 1]], //
            [[2, 0], [2, 2], [4, 2], [4, 2]], //
            [[2, 0], [3, 2], [4, 4], [4, 4]], //
            [[2, 2], [4, 1], [6, 2], [6, 2]], // 10
            [[4, 0], [1, 4], [4, 4], [3, 8]], //
            [[2, 2], [6, 2], [4, 6], [7, 4]], //
            [[4, 0], [8, 1], [8, 4], [12, 4]], //
            [[3, 1], [4, 5], [11, 5], [11, 5]], //
            [[5, 1], [5, 5], [5, 7], [11, 7]], // 15
            [[5, 1], [7, 3], [15, 2], [3, 13]], //
            [[1, 5], [10, 1], [1, 15], [2, 17]], //
            [[5, 1], [9, 4], [17, 1], [2, 19]], //
            [[3, 4], [3, 11], [17, 4], [9, 16]], //
            [[3, 5], [3, 13], [15, 5], [15, 10]], // 20
            [[4, 4], [17, 0], [17, 6], [19, 6]], //
            [[2, 7], [17, 0], [7, 16], [34, 0]], //
            [[4, 5], [4, 14], [11, 14], [16, 14]], //
            [[6, 4], [6, 14], [11, 16], [30, 2]], //
            [[8, 4], [8, 13], [7, 22], [22, 13]], // 25
            [[10, 2], [19, 4], [28, 6], [33, 4]], //
            [[8, 4], [22, 3], [8, 26], [12, 28]], //
            [[3, 10], [3, 23], [4, 31], [11, 31]], //
            [[7, 7], [21, 7], [1, 37], [19, 26]], //
            [[5, 10], [19, 10], [15, 25], [23, 25]], // 30
            [[13, 3], [2, 29], [42, 1], [23, 28]], //
            [[17, 0], [10, 23], [10, 35], [19, 35]], //
            [[17, 1], [14, 21], [29, 19], [11, 46]], //
            [[13, 6], [14, 23], [44, 7], [59, 1]], //
            [[12, 7], [12, 26], [39, 14], [22, 41]], // 35
            [[6, 14], [6, 34], [46, 10], [2, 64]], //
            [[17, 4], [29, 14], [49, 10], [24, 46]], //
            [[4, 18], [13, 32], [48, 14], [42, 32]], //
            [[20, 4], [40, 7], [43, 22], [10, 67]], //
            [[19, 6], [18, 31], [34, 34], [20, 61]], // 40
        ];

        /**
         * @var array Positions of alignment patterns.
         *            This array includes only the second and the third position of the alignment patterns. Rest of them can be calculated from the distance between them.
         *            See Table 1 in Appendix E (pp.71) of JIS X0510:2004.
         */
        protected $alignmentPattern = [
            [0, 0],
            [0, 0], [18, 0], [22, 0], [26, 0], [30, 0], //  1- 5
            [34, 0], [22, 38], [24, 42], [26, 46], [28, 50], //  6-10
            [30, 54], [32, 58], [34, 62], [26, 46], [26, 48], // 11-15
            [26, 50], [30, 54], [30, 56], [30, 58], [34, 62], // 16-20
            [28, 50], [26, 50], [30, 54], [28, 54], [32, 58], // 21-25
            [30, 58], [34, 62], [26, 50], [30, 54], [26, 52], // 26-30
            [30, 56], [34, 60], [30, 58], [34, 62], [30, 54], // 31-35
            [24, 50], [28, 54], [32, 58], [26, 54], [30, 58], // 35-40
        ];

        /**
         * @var array Version information pattern (BCH coded).
         *            See Table 1 in Appendix D (pp.68) of JIS X0510:2004.
         *            size: [QRSPEC_VERSION_MAX - 6]
         */
        protected $versionPattern = [
            0x07c94, 0x085bc, 0x09a99, 0x0a4d3, 0x0bbf6, 0x0c762, 0x0d847, 0x0e60d, //
            0x0f928, 0x10b78, 0x1145d, 0x12a17, 0x13532, 0x149a6, 0x15683, 0x168c9, //
            0x177ec, 0x18ec4, 0x191e1, 0x1afab, 0x1b08e, 0x1cc1a, 0x1d33f, 0x1ed75, //
            0x1f250, 0x209d5, 0x216f0, 0x228ba, 0x2379f, 0x24b0b, 0x2542e, 0x26a64, //
            0x27541, 0x28c69,
        ];

        /**
         * @var array Format information
         */
        protected $formatInfo = [
            [0x77c4, 0x72f3, 0x7daa, 0x789d, 0x662f, 0x6318, 0x6c41, 0x6976], //
            [0x5412, 0x5125, 0x5e7c, 0x5b4b, 0x45f9, 0x40ce, 0x4f97, 0x4aa0], //
            [0x355f, 0x3068, 0x3f31, 0x3a06, 0x24b4, 0x2183, 0x2eda, 0x2bed], //
            [0x1689, 0x13be, 0x1ce7, 0x19d0, 0x0762, 0x0255, 0x0d0c, 0x083b], //
        ];

        // -------------------------------------------------
        // -------------------------------------------------

        /**
         * This is the class constructor.
         * Creates a QRcode object.
         *
         * @param string $code    code to represent using QRcode
         * @param string $eclevel error level: <ul><li>L : About 7% or less errors can be corrected.</li><li>M : About 15% or less errors can be corrected.</li><li>Q : About 25% or less errors can be corrected.</li><li>H : About 30% or less errors can be corrected.</li></ul>
         *
         * @since 1.0.000
         */
        public function __construct($code, $eclevel = 'L')
        {
            $barcode_array = [];
            if ((is_null($code)) or ($code == '\0') or ($code == '')) {
                return false;
            }
            // set error correction level
            $this->level = array_search($eclevel, ['L', 'M', 'Q', 'H']);
            if ($this->level === false) {

The property level does not exist on QRcode. Did you maybe forget to declare it?

                $this->level = QR_ECLEVEL_L;
            }
            if (($this->hint != QR_MODE_8B) and ($this->hint != QR_MODE_KJ)) {

The property hint does not exist on QRcode. Did you maybe forget to declare it?

                return false;
            }
            if (($this->version < 0) or ($this->version > QRSPEC_VERSION_MAX)) {
                return false;
            }
            $this->items = [];
            $this->encodeString($code);

The call to QRcode::encodeString() has too few arguments starting with version.

            $qrTab = $this->binarize($this->data);

The method binarize() does not exist on QRcode.

            $size = count($qrTab);
            $barcode_array['num_rows'] = $size;
            $barcode_array['num_cols'] = $size;
            $barcode_array['bcode'] = [];
            foreach ($qrTab as $line) {
                $arrAdd = [];
                foreach (str_split($line) as $char) {
                    $arrAdd[] = ($char == '1') ? 1 : 0;
                }
                $barcode_array['bcode'][] = $arrAdd;
            }
            $this->barcode_array = $barcode_array;
        }

        /**
         * Returns a barcode array which is readable by TCPDF.
         *
         * @return array barcode array readable by TCPDF;
         */
        public function getBarcodeArray()
        {
            return $this->barcode_array;

The property barcode_array does not exist on QRcode. Did you maybe forget to declare it?

        }

        /**
         * Convert the frame in binary form.
         *
         * @param array $frame array to binarize
         *
         * @return array frame in binary form
         */
        protected function binarize($frame)
        {
            $len = count($frame);
            // the frame is square (width = height)
            foreach ($frame as &$frameLine) {
                for ($i = 0; $i < $len; $i++) {
                    $frameLine[$i] = (ord($frameLine[$i]) & 1) ? '1' : '0';
                }
            }

            return $frame;
        }

        /**
         * Encode the input string to QR code.
         *
         * @param string $string input string to encode
         */
        protected function encodeString($string)
        {
            $this->dataStr = $string;

The property dataStr does not exist on QRcode. Did you mean data?

            if (!$this->casesensitive) {

The property casesensitive does not exist on QRcode. Did you maybe forget to declare it?

                $this->toUpper();

The method toUpper() does not exist on QRcode.

            }
            $ret = $this->splitString();

The method splitString() does not exist on QRcode.

            if ($ret < 0) {
                return;
            }
            $this->encodeMask(-1);

-1 of type integer is incompatible with the type QRinput expected by parameter $input of QRcode::encodeMask().

The call to QRcode::encodeMask() has too few arguments starting with mask.

        }

        /**
         * Encode mask.
         *
         * @param int $mask masking mode
         */
        protected function encodeMask($mask)
        {
            $spec = [0, 0, 0, 0, 0];
            $this->datacode = $this->getByteStream($this->items);

The property items does not exist on QRcode. Did you maybe forget to declare it?

The method getByteStream() does not exist on QRcode.

            if (is_null($this->datacode)) {

The property datacode does not exist on QRcode. Did you maybe forget to declare it?

                return;
            }
            $spec = $this->getEccSpec($this->version, $this->level, $spec);

The property level does not exist on QRcode. Did you maybe forget to declare it?

The method getEccSpec() does not exist on QRcode.

            $this->b1 = $this->rsBlockNum1($spec);

The method rsBlockNum1() does not exist on QRcode.

            $this->dataLength = $this->rsDataLength($spec);

The method rsDataLength() does not exist on QRcode.

            $this->eccLength = $this->rsEccLength($spec);

The method rsEccLength() does not exist on QRcode.

            $this->ecccode = array_fill(0, $this->eccLength, 0);

The property eccLength does not exist on QRcode. Did you maybe forget to declare it?

            $this->blocks = $this->rsBlockNum($spec);

The method rsBlockNum() does not exist on QRcode.

            $ret = $this->init($spec);

The method init() does not exist on QRcode.

            if ($ret < 0) {
                return;
            }
            $this->count = 0;
            $this->width = $this->getWidth($this->version);

The method getWidth() does not exist on QRcode.

            $this->frame = $this->newFrame($this->version);

The method newFrame() does not exist on QRcode.

            $this->x = $this->width - 1;
            $this->y = $this->width - 1;
            $this->dir = -1;
            $this->bit = -1;
            // inteleaved data and ecc codes
            for ($i = 0; $i < ($this->dataLength + $this->eccLength); $i++) {

The property dataLength does not exist on QRcode. Did you maybe forget to declare it?

                $code = $this->getCode();

The method getCode() does not exist on QRcode.

                $bit = 0x80;
                for ($j = 0; $j < 8; $j++) {
                    $addr = $this->getNextPosition();

The method getNextPosition() does not exist on QRcode.

                    $this->setFrameAt($addr, 0x02 | (($bit & $code) != 0));

The method setFrameAt() does not exist on QRcode.

                    $bit = $bit >> 1;
                }
            }
            // remainder bits
            $j = $this->getRemainder($this->version);

The method getRemainder() does not exist on QRcode.

            for ($i = 0; $i < $j; $i++) {
                $addr = $this->getNextPosition();
                $this->setFrameAt($addr, 0x02);
            }
            // masking
            $this->runLength = array_fill(0, QRSPEC_WIDTH_MAX + 1, 0);
            if ($mask < 0) {
                if (QR_FIND_BEST_MASK) {
                    $masked = $this->mask($this->width, $this->frame, $this->level);

The method mask() does not exist on QRcode.

The property frame does not exist on QRcode. Did you maybe forget to declare it?

                } else {
                    $masked = $this->makeMask($this->width, $this->frame, (intval(QR_DEFAULT_MASK) % 8), $this->level);

The method makeMask() does not exist on QRcode.

                }
            } else {
                $masked = $this->makeMask($this->width, $this->frame, $mask, $this->level);
            }
            if ($masked == null) {
                return;
            }
            $this->data = $masked;
        }

        // - - - - - - - - - - - - - - - - - - - - - - - - -

        // FrameFiller

        /**
         * Set frame value at specified position.
         *
         * @param array $at  x,y position
         * @param int   $val value of the character to set
         */
        protected function setFrameAt($at, $val)
        {
            $this->frame[$at['y']][$at['x']] = chr($val);
        }

        /**
         * Get frame value at specified position.
         *
         * @param array $at x,y position
         *
         * @return value at specified position

The type value was not found. Maybe you did not declare it correctly or list all dependencies?

         */
        protected function getFrameAt($at)
        {
            return ord($this->frame[$at['y']][$at['x']]);

The property frame does not exist on QRcode. Did you maybe forget to declare it?

        }

        /**
         * Return the next frame position.
         *
         * @return array of x,y coordinates
         */
        protected function getNextPosition()
        {
            do {
                if ($this->bit == -1) {

The property bit does not exist on QRcode. Did you maybe forget to declare it?

                    $this->bit = 0;

                    return ['x'=>$this->x, 'y'=>$this->y];

The property y does not exist on QRcode. Did you maybe forget to declare it?

The property x does not exist on QRcode. Did you maybe forget to declare it?

                }
                $x = $this->x;
                $y = $this->y;
                $w = $this->width;
                if ($this->bit == 0) {
                    $x--;
                    $this->bit++;
                } else {
                    $x++;
                    $y += $this->dir;

The property dir does not exist on QRcode. Did you maybe forget to declare it?

                    $this->bit--;
                }
                if ($this->dir < 0) {
                    if ($y < 0) {
                        $y = 0;
                        $x -= 2;
                        $this->dir = 1;
                        if ($x == 6) {
                            $x--;
                            $y = 9;
                        }
                    }
                } else {
                    if ($y == $w) {
                        $y = $w - 1;
                        $x -= 2;
                        $this->dir = -1;
                        if ($x == 6) {
                            $x--;
                            $y -= 8;
                        }
                    }
                }
                if (($x < 0) or ($y < 0)) {
                    return;
                }
                $this->x = $x;
                $this->y = $y;
            } while (ord($this->frame[$y][$x]) & 0x80);

            return ['x'=>$x, 'y'=>$y];
        }

        // - - - - - - - - - - - - - - - - - - - - - - - - -

        // QRrawcode

        /**
         * Initialize code.
         *
         * @param array $spec array of ECC specification
         *
         * @return 0 in case of success, -1 in case of error

The doc comment 0 at position 0 could not be parsed: Unknown type name '0' at position 0 in 0.

         */
        protected function init($spec)
        {
            $dl = $this->rsDataCodes1($spec);

The method rsDataCodes1() does not exist on QRcode.

            $el = $this->rsEccCodes1($spec);

The method rsEccCodes1() does not exist on QRcode.

            $rs = $this->init_rs(8, 0x11d, 0, 1, $el, 255 - $dl - $el);

The method init_rs() does not exist on QRcode.

            $blockNo = 0;
            $dataPos = 0;
            $eccPos = 0;
            $endfor = $this->rsBlockNum1($spec);
            for ($i = 0; $i < $endfor; $i++) {
                $ecc = array_slice($this->ecccode, $eccPos);

The property ecccode does not exist on QRcode. Did you maybe forget to declare it?

                $this->rsblocks[$blockNo] = [];
                $this->rsblocks[$blockNo]['dataLength'] = $dl;
                $this->rsblocks[$blockNo]['data'] = array_slice($this->datacode, $dataPos);

The property datacode does not exist on QRcode. Did you maybe forget to declare it?

                $this->rsblocks[$blockNo]['eccLength'] = $el;
                $ecc = $this->encode_rs_char($rs, $this->rsblocks[$blockNo]['data'], $ecc);

The property rsblocks does not exist on QRcode. Did you maybe forget to declare it?

The method encode_rs_char() does not exist on QRcode.

                $this->rsblocks[$blockNo]['ecc'] = $ecc;
                $this->ecccode = array_merge(array_slice($this->ecccode, 0, $eccPos), $ecc);
                $dataPos += $dl;
                $eccPos += $el;
                $blockNo++;
            }
            if ($this->rsBlockNum2($spec) == 0) {

The method rsBlockNum2() does not exist on QRcode.

                return 0;
            }
            $dl = $this->rsDataCodes2($spec);

The method rsDataCodes2() does not exist on QRcode.

            $el = $this->rsEccCodes2($spec);

The method rsEccCodes2() does not exist on QRcode.

            $rs = $this->init_rs(8, 0x11d, 0, 1, $el, 255 - $dl - $el);
            if ($rs == null) {
                return -1;
            }
            $endfor = $this->rsBlockNum2($spec);
            for ($i = 0; $i < $endfor; $i++) {
                $ecc = array_slice($this->ecccode, $eccPos);
                $this->rsblocks[$blockNo] = [];
                $this->rsblocks[$blockNo]['dataLength'] = $dl;
                $this->rsblocks[$blockNo]['data'] = array_slice($this->datacode, $dataPos);
                $this->rsblocks[$blockNo]['eccLength'] = $el;
                $ecc = $this->encode_rs_char($rs, $this->rsblocks[$blockNo]['data'], $ecc);
                $this->rsblocks[$blockNo]['ecc'] = $ecc;
                $this->ecccode = array_merge(array_slice($this->ecccode, 0, $eccPos), $ecc);
                $dataPos += $dl;
                $eccPos += $el;
                $blockNo++;
            }

            return 0;
        }

        /**
         * Return Reed-Solomon block code.
         *
         * @return array rsblocks
         */
        protected function getCode()
        {
            if ($this->count < $this->dataLength) {

The property dataLength does not exist on QRcode. Did you maybe forget to declare it?

The property count does not exist on QRcode. Did you maybe forget to declare it?

                $row = $this->count % $this->blocks;

The property blocks does not exist on QRcode. Did you maybe forget to declare it?

                $col = $this->count / $this->blocks;
                if ($col >= $this->rsblocks[0]['dataLength']) {

The property rsblocks does not exist on QRcode. Did you maybe forget to declare it?

                    $row += $this->b1;

The property b1 does not exist on QRcode. Did you maybe forget to declare it?

                }
                $ret = $this->rsblocks[$row]['data'][$col];
            } elseif ($this->count < $this->dataLength + $this->eccLength) {

The property eccLength does not exist on QRcode. Did you maybe forget to declare it?

                $row = ($this->count - $this->dataLength) % $this->blocks;
                $col = ($this->count - $this->dataLength) / $this->blocks;
                $ret = $this->rsblocks[$row]['ecc'][$col];
            } else {
                return 0;
            }
            $this->count++;

            return $ret;
        }

        // - - - - - - - - - - - - - - - - - - - - - - - - -

        // QRmask

        /**
         * Write Format Information on frame and returns the number of black bits.
         *
         * @param int   $width frame width
         * @param array $frame frame
         * @param array $mask  masking mode
         * @param int   $level error correction level
         *
         * @return int blacks
         */
        protected function writeFormatInformation($width, &$frame, $mask, $level)
        {
            $blacks = 0;
            $format = $this->getFormatInfo($mask, $level);

The method getFormatInfo() does not exist on QRcode.

            for ($i = 0; $i < 8; $i++) {
                if ($format & 1) {
                    $blacks += 2;
                    $v = 0x85;
                } else {
                    $v = 0x84;
                }
                $frame[8][$width - 1 - $i] = chr($v);
                if ($i < 6) {
                    $frame[$i][8] = chr($v);
                } else {
                    $frame[$i + 1][8] = chr($v);
                }
                $format = $format >> 1;
            }
            for ($i = 0; $i < 7; $i++) {
                if ($format & 1) {
                    $blacks += 2;
                    $v = 0x85;
                } else {
                    $v = 0x84;
                }
                $frame[$width - 7 + $i][8] = chr($v);
                if ($i == 0) {
                    $frame[8][7] = chr($v);
                } else {
                    $frame[8][6 - $i] = chr($v);
                }
                $format = $format >> 1;
            }

            return $blacks;
        }

        /**
         * mask0.
         *
         * @param int $x X position
         * @param int $y Y position
         *
         * @return int mask
         */
        protected function mask0($x, $y)
        {
            return ($x + $y) & 1;
        }

        /**
         * mask1.
         *
         * @param int $x X position
         * @param int $y Y position
         *
         * @return int mask
         */
        protected function mask1($x, $y)
        {
            return $y & 1;
        }

        /**
         * mask2.
         *
         * @param int $x X position
         * @param int $y Y position
         *
         * @return int mask
         */
        protected function mask2($x, $y)
        {
            return $x % 3;
        }

        /**
         * mask3.
         *
         * @param int $x X position
         * @param int $y Y position
         *
         * @return int mask
         */
        protected function mask3($x, $y)
        {
            return ($x + $y) % 3;
        }

        /**
         * mask4.
         *
         * @param int $x X position
         * @param int $y Y position
         *
         * @return int mask
         */
        protected function mask4($x, $y)
        {
            return (((int) ($y / 2)) + ((int) ($x / 3))) & 1;
        }

        /**
         * mask5.
         *
         * @param int $x X position
         * @param int $y Y position
         *
         * @return int mask
         */
        protected function mask5($x, $y)
        {
            return (($x * $y) & 1) + ($x * $y) % 3;
        }

        /**
         * mask6.
         *
         * @param int $x X position
         * @param int $y Y position
         *
         * @return int mask
         */
        protected function mask6($x, $y)
        {
            return ((($x * $y) & 1) + ($x * $y) % 3) & 1;
        }

        /**
         * mask7.
         *
         * @param int $x X position
         * @param int $y Y position
         *
         * @return int mask
         */
        protected function mask7($x, $y)
        {
            return ((($x * $y) % 3) + (($x + $y) & 1)) & 1;
        }

        /**
         * Return bitmask.
         *
         * @param int   $maskNo mask number
         * @param int   $width  width
         * @param array $frame  frame
         *
         * @return array bitmask
         */
        protected function generateMaskNo($maskNo, $width, $frame)
        {
            $bitMask = array_fill(0, $width, array_fill(0, $width, 0));
            for ($y = 0; $y < $width; $y++) {
                for ($x = 0; $x < $width; $x++) {
                    if (ord($frame[$y][$x]) & 0x80) {
                        $bitMask[$y][$x] = 0;
                    } else {
                        $maskFunc = call_user_func([$this, 'mask'.$maskNo], $x, $y);
                        $bitMask[$y][$x] = ($maskFunc == 0) ? 1 : 0;
                    }
                }
            }

            return $bitMask;
        }

        /**
         * makeMaskNo.
         *
         * @param int  $maskNo
         * @param int  $width
         * @param int  $s
         * @param int  $d
         * @param bool $maskGenOnly
         *
         * @return int b
         */
        protected function makeMaskNo($maskNo, $width, $s, &$d, $maskGenOnly = false)
        {
            $b = 0;
            $bitMask = [];

The assignment to $bitMask is dead and can be removed.

            $bitMask = $this->generateMaskNo($maskNo, $width, $s, $d);

The method generateMaskNo() does not exist on QRcode.

            if ($maskGenOnly) {
                return;
            }
            $d = $s;
            for ($y = 0; $y < $width; $y++) {
                for ($x = 0; $x < $width; $x++) {
                    if ($bitMask[$y][$x] == 1) {
                        $d[$y][$x] = chr(ord($s[$y][$x]) ^ (int) $bitMask[$y][$x]);
                    }
                    $b += (int) (ord($d[$y][$x]) & 1);
                }
            }

            return $b;
        }

        /**
         * makeMask.
         *
         * @param int   $width
         * @param array $frame
         * @param int   $maskNo
         * @param int   $level
         *
         * @return array mask
         */
        protected function makeMask($width, $frame, $maskNo, $level)
        {
            $masked = array_fill(0, $width, str_repeat("\0", $width));
            $this->makeMaskNo($maskNo, $width, $frame, $masked);

The method makeMaskNo() does not exist on QRcode.

            $this->writeFormatInformation($width, $masked, $maskNo, $level);

The method writeFormatInformation() does not exist on QRcode.

            return $masked;
        }

        /**
         * calcN1N3.
         *
         * @param int $length
         *
         * @return int demerit
         */
        protected function calcN1N3($length)
        {
            $demerit = 0;
            for ($i = 0; $i < $length; $i++) {
                if ($this->runLength[$i] >= 5) {

The property runLength does not exist on QRcode. Did you maybe forget to declare it?

                    $demerit += (N1 + ($this->runLength[$i] - 5));
                }
                if ($i & 1) {
                    if (($i >= 3) and ($i < ($length - 2)) and ($this->runLength[$i] % 3 == 0)) {
                        $fact = (int) ($this->runLength[$i] / 3);
                        if (($this->runLength[$i - 2] == $fact)
                            and ($this->runLength[$i - 1] == $fact)
                            and ($this->runLength[$i + 1] == $fact)
                            and ($this->runLength[$i + 2] == $fact)) {
                            if (($this->runLength[$i - 3] < 0) or ($this->runLength[$i - 3] >= (4 * $fact))) {
                                $demerit += N3;
                            } elseif ((($i + 3) >= $length) or ($this->runLength[$i + 3] >= (4 * $fact))) {
                                $demerit += N3;
                            }
                        }
                    }
                }
            }

            return $demerit;
        }

        /**
         * evaluateSymbol.
         *
         * @param int   $width
         * @param array $frame
         *
         * @return int demerit
         */
        protected function evaluateSymbol($width, $frame)
        {
            $head = 0;
            $demerit = 0;
            for ($y = 0; $y < $width; $y++) {
                $head = 0;
                $this->runLength[0] = 1;
                $frameY = $frame[$y];
                if ($y > 0) {
                    $frameYM = $frame[$y - 1];
                }
                for ($x = 0; $x < $width; $x++) {
                    if (($x > 0) and ($y > 0)) {
                        $b22 = ord($frameY[$x]) & ord($frameY[$x - 1]) & ord($frameYM[$x]) & ord($frameYM[$x - 1]);

The variable $frameYM does not seem to be defined for all execution paths leading up to this point.

                        $w22 = ord($frameY[$x]) | ord($frameY[$x - 1]) | ord($frameYM[$x]) | ord($frameYM[$x - 1]);
                        if (($b22 | ($w22 ^ 1)) & 1) {
                            $demerit += N2;
                        }
                    }
                    if (($x == 0) and (ord($frameY[$x]) & 1)) {
                        $this->runLength[0] = -1;
                        $head = 1;
                        $this->runLength[$head] = 1;
                    } elseif ($x > 0) {
                        if ((ord($frameY[$x]) ^ ord($frameY[$x - 1])) & 1) {
                            $head++;
                            $this->runLength[$head] = 1;
                        } else {
                            $this->runLength[$head]++;

The property runLength does not exist on QRcode. Did you maybe forget to declare it?

                        }
                    }
                }
                $demerit += $this->calcN1N3($head + 1);

The method calcN1N3() does not exist on QRcode.

            }
            for ($x = 0; $x < $width; $x++) {
                $head = 0;
                $this->runLength[0] = 1;
                for ($y = 0; $y < $width; $y++) {
                    if (($y == 0) and (ord($frame[$y][$x]) & 1)) {
                        $this->runLength[0] = -1;
                        $head = 1;
                        $this->runLength[$head] = 1;
                    } elseif ($y > 0) {
                        if ((ord($frame[$y][$x]) ^ ord($frame[$y - 1][$x])) & 1) {
                            $head++;
                            $this->runLength[$head] = 1;
                        } else {
                            $this->runLength[$head]++;
                        }
                    }
                }
                $demerit += $this->calcN1N3($head + 1);
            }

            return $demerit;
        }

        /**
         * mask.
         *
         * @param int   $width
         * @param array $frame
         * @param int   $level
         *
         * @return array best mask
         */
        protected function mask($width, $frame, $level)
        {
            $minDemerit = PHP_INT_MAX;
            $bestMaskNum = 0;

The assignment to $bestMaskNum is dead and can be removed.

            $bestMask = [];

The assignment to $bestMask is dead and can be removed.

            $checked_masks = [0, 1, 2, 3, 4, 5, 6, 7];
            if (QR_FIND_FROM_RANDOM !== false) {

The condition QR_FIND_FROM_RANDOM !== false is always false.

                $howManuOut = 8 - (QR_FIND_FROM_RANDOM % 9);
                for ($i = 0; $i < $howManuOut; $i++) {
                    $remPos = rand(0, count($checked_masks) - 1);
                    unset($checked_masks[$remPos]);
                    $checked_masks = array_values($checked_masks);
                }
            }
            $bestMask = $frame;
            foreach ($checked_masks as $i) {
                $mask = array_fill(0, $width, str_repeat("\0", $width));
                $demerit = 0;

The assignment to $demerit is dead and can be removed.

                $blacks = 0;

The assignment to $blacks is dead and can be removed.

                $blacks = $this->makeMaskNo($i, $width, $frame, $mask);
                $blacks += $this->writeFormatInformation($width, $mask, $i, $level);
                $blacks = (int) (100 * $blacks / ($width * $width));
                $demerit = (int) ((int) (abs($blacks - 50) / 5) * N4);
                $demerit += $this->evaluateSymbol($width, $mask);

The method evaluateSymbol() does not exist on QRcode.

                if ($demerit < $minDemerit) {
                    $minDemerit = $demerit;
                    $bestMask = $mask;
                    $bestMaskNum = $i;
                }
            }

            return $bestMask;
        }

        // - - - - - - - - - - - - - - - - - - - - - - - - -

        // QRsplit

        /**
         * Return true if the character at specified position is a number.
         *
         * @param string $str string
         * @param int    $pos characted position
         *
         * @return bool true of false
         */
        protected function isdigitat($str, $pos)
        {
            if ($pos >= strlen($str)) {
                return false;
            }

            return (ord($str[$pos]) >= ord('0')) && (ord($str[$pos]) <= ord('9'));
        }

        /**
         * Return true if the character at specified position is an alphanumeric character.
         *
         * @param string $str string
         * @param int    $pos characted position
         *
         * @return bool true of false
         */
        protected function isalnumat($str, $pos)
        {
            if ($pos >= strlen($str)) {
                return false;
            }

            return $this->lookAnTable(ord($str[$pos])) >= 0;

The method lookAnTable() does not exist on QRcode.

        }

        /**
         * identifyMode.
         *
         * @param int $pos
         *
         * @return int mode
         */
        protected function identifyMode($pos)
        {
            if ($pos >= strlen($this->dataStr)) {

The property dataStr does not exist on QRcode. Did you mean data?

                return QR_MODE_NL;
            }
            $c = $this->dataStr[$pos];
            if ($this->isdigitat($this->dataStr, $pos)) {

The method isdigitat() does not exist on QRcode.

                return QR_MODE_NM;
            } elseif ($this->isalnumat($this->dataStr, $pos)) {

The method isalnumat() does not exist on QRcode.

                return QR_MODE_AN;
            } elseif ($this->hint == QR_MODE_KJ) {

The property hint does not exist on QRcode. Did you maybe forget to declare it?

                if ($pos + 1 < strlen($this->dataStr)) {
                    $d = $this->dataStr[$pos + 1];
                    $word = (ord($c) << 8) | ord($d);
                    if (($word >= 0x8140 && $word <= 0x9ffc) or ($word >= 0xe040 && $word <= 0xebbf)) {
                        return QR_MODE_KJ;
                    }
                }
            }

            return QR_MODE_8B;
        }

        /**
         * eatNum.
         *
         * @return int run
         */
        protected function eatNum()
        {
            $ln = $this->lengthIndicator(QR_MODE_NM, $this->version);

The method lengthIndicator() does not exist on QRcode.

            $p = 0;
            while ($this->isdigitat($this->dataStr, $p)) {

The property dataStr does not exist on QRcode. Did you mean data?

                $p++;
            }
            $run = $p;
            $mode = $this->identifyMode($p);

The method identifyMode() does not exist on QRcode.

            if ($mode == QR_MODE_8B) {
                $dif = $this->estimateBitsModeNum($run) + 4 + $ln

The method estimateBitsModeNum() does not exist on QRcode.

                + $this->estimateBitsMode8(1)         // + 4 + l8

The method estimateBitsMode8() does not exist on QRcode.

                - $this->estimateBitsMode8($run + 1); // - 4 - l8
                if ($dif > 0) {
                    return $this->eat8();

The method eat8() does not exist on QRcode.

                }
            }
            if ($mode == QR_MODE_AN) {
                $dif = $this->estimateBitsModeNum($run) + 4 + $ln
                + $this->estimateBitsModeAn(1)        // + 4 + la

The method estimateBitsModeAn() does not exist on QRcode.

                - $this->estimateBitsModeAn($run + 1); // - 4 - la
                if ($dif > 0) {
                    return $this->eatAn();

The method eatAn() does not exist on QRcode.

                }
            }
            $this->items = $this->appendNewInputItem($this->items, QR_MODE_NM, $run, str_split($this->dataStr));

The property items does not exist on QRcode. Did you maybe forget to declare it?

The method appendNewInputItem() does not exist on QRcode.

            return $run;
        }

        /**
         * eatAn.
         *
         * @return int run
         */
        protected function eatAn()
        {
            $la = $this->lengthIndicator(QR_MODE_AN, $this->version);
            $ln = $this->lengthIndicator(QR_MODE_NM, $this->version);
            $p = 0;
            while ($this->isalnumat($this->dataStr, $p)) {

The property dataStr does not exist on QRcode. Did you mean data?

                if ($this->isdigitat($this->dataStr, $p)) {
                    $q = $p;
                    while ($this->isdigitat($this->dataStr, $q)) {
                        $q++;
                    }
                    $dif = $this->estimateBitsModeAn($p) // + 4 + la
                    + $this->estimateBitsModeNum($q - $p) + 4 + $ln
                    - $this->estimateBitsModeAn($q); // - 4 - la
                    if ($dif < 0) {
                        break;
                    } else {
                        $p = $q;
                    }
                } else {
                    $p++;
                }
            }
            $run = $p;
            if (!$this->isalnumat($this->dataStr, $p)) {
                $dif = $this->estimateBitsModeAn($run) + 4 + $la
                + $this->estimateBitsMode8(1) // + 4 + l8
                - $this->estimateBitsMode8($run + 1); // - 4 - l8
                if ($dif > 0) {
                    return $this->eat8();
                }
            }
            $this->items = $this->appendNewInputItem($this->items, QR_MODE_AN, $run, str_split($this->dataStr));

The property items does not exist on QRcode. Did you maybe forget to declare it?

            return $run;
        }

        /**
         * eatKanji.
         *
         * @return int run
         */
        protected function eatKanji()
        {
            $p = 0;
            while ($this->identifyMode($p) == QR_MODE_KJ) {
                $p += 2;
            }
            $this->items = $this->appendNewInputItem($this->items, QR_MODE_KJ, $p, str_split($this->dataStr));

The property dataStr does not exist on QRcode. Did you mean data?

The property items does not exist on QRcode. Did you maybe forget to declare it?

            return $run;

The variable $run seems to be never defined.

        }

        /**
         * eat8.
         *
         * @return int run
         */
        protected function eat8()
        {
            $la = $this->lengthIndicator(QR_MODE_AN, $this->version);
            $ln = $this->lengthIndicator(QR_MODE_NM, $this->version);
            $p = 1;
            $dataStrLen = strlen($this->dataStr);

The property dataStr does not exist on QRcode. Did you mean data?

            while ($p < $dataStrLen) {
                $mode = $this->identifyMode($p);
                if ($mode == QR_MODE_KJ) {
                    break;
                }
                if ($mode == QR_MODE_NM) {
                    $q = $p;
                    while ($this->isdigitat($this->dataStr, $q)) {
                        $q++;
                    }
                    $dif = $this->estimateBitsMode8($p) // + 4 + l8
                    + $this->estimateBitsModeNum($q - $p) + 4 + $ln
                    - $this->estimateBitsMode8($q); // - 4 - l8
                    if ($dif < 0) {
                        break;
                    } else {
                        $p = $q;
                    }
                } elseif ($mode == QR_MODE_AN) {
                    $q = $p;
                    while ($this->isalnumat($this->dataStr, $q)) {
                        $q++;
                    }
                    $dif = $this->estimateBitsMode8($p)  // + 4 + l8
                    + $this->estimateBitsModeAn($q - $p) + 4 + $la
                    - $this->estimateBitsMode8($q); // - 4 - l8
                    if ($dif < 0) {
                        break;
                    } else {
                        $p = $q;
                    }
                } else {
                    $p++;
                }
            }
            $run = $p;
            $this->items = $this->appendNewInputItem($this->items, QR_MODE_8B, $run, str_split($this->dataStr));

The property items does not exist on QRcode. Did you maybe forget to declare it?

            return $run;
        }

        /**
         * splitString.
         */
        protected function splitString()
        {
            while (strlen($this->dataStr) > 0) {

The property dataStr does not exist on QRcode. Did you mean data?

                if ($this->dataStr == '') {
                    return 0;
                }
                $mode = $this->identifyMode(0);
                switch ($mode) {
                    case QR_MODE_NM: {
                        $length = $this->eatNum();

The method eatNum() does not exist on QRcode.

                        break;
                    }
                    case QR_MODE_AN: {
                        $length = $this->eatAn();
                        break;
                    }
                    case QR_MODE_KJ: {
                        if ($hint == QR_MODE_KJ) {

The variable $hint seems to be never defined.

                            $length = $this->eatKanji();

The method eatKanji() does not exist on QRcode.

                        } else {
                            $length = $this->eat8();
                        }
                        break;
                    }
                    default: {
                        $length = $this->eat8();
                        break;
                    }
                }
                if ($length == 0) {
                    return 0;
                }
                if ($length < 0) {
                    return -1;
                }
                $this->dataStr = substr($this->dataStr, $length);
            }
        }

        /**
         * toUpper.
         */
        protected function toUpper()
        {
            $stringLen = strlen($this->dataStr);

The property dataStr does not exist on QRcode. Did you mean data?

            $p = 0;
            while ($p < $stringLen) {
                $mode = $this->identifyMode(substr($this->dataStr, $p), $this->hint);

The property hint does not exist on QRcode. Did you maybe forget to declare it?

                if ($mode == QR_MODE_KJ) {
                    $p += 2;
                } else {
                    if ((ord($this->dataStr[$p]) >= ord('a')) and (ord($this->dataStr[$p]) <= ord('z'))) {
                        $this->dataStr[$p] = chr(ord($this->dataStr[$p]) - 32);
                    }
                    $p++;
                }
            }

            return $this->dataStr;
        }

        // - - - - - - - - - - - - - - - - - - - - - - - - -

        // QRinputItem

        /**
         * newInputItem.
         *
         * @param int   $mode
         * @param int   $size
         * @param array $data
         * @param array $bstream
         *
         * @return array input item
         */
        protected function newInputItem($mode, $size, $data, $bstream = null)
        {
            $setData = array_slice($data, 0, $size);
            if (count($setData) < $size) {
                $setData = array_merge($setData, array_fill(0, ($size - count($setData)), 0));
            }
            if (!$this->check($mode, $size, $setData)) {

The method check() does not exist on QRcode.

                return;
            }
            $inputitem = [];
            $inputitem['mode'] = $mode;
            $inputitem['size'] = $size;
            $inputitem['data'] = $setData;
            $inputitem['bstream'] = $bstream;

            return $inputitem;
        }

        /**
         * encodeModeNum.
         *
         * @param array $inputitem
         * @param int   $version
         *
         * @return array input item
         */
        protected function encodeModeNum($inputitem, $version)
        {
            $words = (int) ($inputitem['size'] / 3);
            $inputitem['bstream'] = [];
            $val = 0x1;
            $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, $val);

The method appendNum() does not exist on QRcode.

            $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_NM, $version), $inputitem['size']);
            for ($i = 0; $i < $words; $i++) {
                $val = (ord($inputitem['data'][$i * 3]) - ord('0')) * 100;
                $val += (ord($inputitem['data'][$i * 3 + 1]) - ord('0')) * 10;
                $val += (ord($inputitem['data'][$i * 3 + 2]) - ord('0'));
                $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 10, $val);
            }
            if ($inputitem['size'] - $words * 3 == 1) {
                $val = ord($inputitem['data'][$words * 3]) - ord('0');
                $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, $val);
            } elseif (($inputitem['size'] - ($words * 3)) == 2) {
                $val = (ord($inputitem['data'][$words * 3]) - ord('0')) * 10;
                $val += (ord($inputitem['data'][$words * 3 + 1]) - ord('0'));
                $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 7, $val);
            }

            return $inputitem;
        }

        /**
         * encodeModeAn.
         *
         * @param array $inputitem
         * @param int   $version
         *
         * @return array input item
         */
        protected function encodeModeAn($inputitem, $version)
        {
            $words = (int) ($inputitem['size'] / 2);
            $inputitem['bstream'] = [];
            $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x02);
            $inputitem['bstream'] = $this->appendNum(v, $this->lengthIndicator(QR_MODE_AN, $version), $inputitem['size']);

The constant v was not found. Maybe you did not declare it correctly or list all dependencies?

            for ($i = 0; $i < $words; $i++) {
                $val = (int) $this->lookAnTable(ord($inputitem['data'][$i * 2])) * 45;
                $val += (int) $this->lookAnTable(ord($inputitem['data'][$i * 2 + 1]));
                $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 11, $val);
            }
            if ($inputitem['size'] & 1) {
                $val = $this->lookAnTable(ord($inputitem['data'][($words * 2)]));
                $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 6, $val);
            }

            return $inputitem;
        }

        /**
         * encodeMode8.
         *
         * @param array $inputitem
         * @param int   $version
         *
         * @return array input item
         */
        protected function encodeMode8($inputitem, $version)
        {
            $inputitem['bstream'] = [];
            $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x4);
            $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_8B, $version), $inputitem['size']);
            for ($i = 0; $i < $inputitem['size']; $i++) {
                $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 8, ord($inputitem['data'][$i]));
            }

            return $inputitem;
        }

        /**
         * encodeModeKanji.
         *
         * @param array $inputitem
         * @param int   $version
         *
         * @return array input item
         */
        protected function encodeModeKanji($inputitem, $version)
        {
            $inputitem['bstream'] = [];
            $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x8);
            $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_KJ, $version), (int) ($inputitem['size'] / 2));
            for ($i = 0; $i < $inputitem['size']; $i += 2) {
                $val = (ord($inputitem['data'][$i]) << 8) | ord($inputitem['data'][$i + 1]);
                if ($val <= 0x9ffc) {
                    $val -= 0x8140;
                } else {
                    $val -= 0xc140;
                }
                $h = ($val >> 8) * 0xc0;
                $val = ($val & 0xff) + $h;
                $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 13, $val);
            }

            return $inputitem;
        }

        /**
         * encodeModeStructure.
         *
         * @param array $inputitem
         *
         * @return array input item
         */
        protected function encodeModeStructure($inputitem)
        {
            $inputitem['bstream'] = [];
            $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x03);
            $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, ord($inputitem['data'][1]) - 1);
            $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, ord($inputitem['data'][0]) - 1);
            $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 8, ord($inputitem['data'][2]));

            return $inputitem;
        }

        /**
         * encodeBitStream.
         *
         * @param array $inputitem
         * @param int   $version
         *
         * @return array input item
         */
        protected function encodeBitStream($inputitem, $version)
        {
            $inputitem['bstream'] = [];
            $words = $this->maximumWords($inputitem['mode'], $version);

The method maximumWords() does not exist on QRcode.

            if ($inputitem['size'] > $words) {
                $st1 = $this->newInputItem($inputitem['mode'], $words, $inputitem['data']);

The method newInputItem() does not exist on QRcode.

                $st2 = $this->newInputItem($inputitem['mode'], $inputitem['size'] - $words, array_slice($inputitem['data'], $words));
                $st1 = $this->encodeBitStream($st1, $version);

The method encodeBitStream() does not exist on QRcode.

                $st2 = $this->encodeBitStream($st2, $version);
                $inputitem['bstream'] = [];
                $inputitem['bstream'] = $this->appendBitstream($inputitem['bstream'], $st1['bstream']);

The method appendBitstream() does not exist on QRcode.

                $inputitem['bstream'] = $this->appendBitstream($inputitem['bstream'], $st2['bstream']);
            } else {
                switch ($inputitem['mode']) {
                    case QR_MODE_NM: {
                        $inputitem = $this->encodeModeNum($inputitem, $version);

The method encodeModeNum() does not exist on QRcode.

                        break;
                    }
                    case QR_MODE_AN: {
                        $inputitem = $this->encodeModeAn($inputitem, $version);

The method encodeModeAn() does not exist on QRcode. Did you maybe mean encodeMask()?

                        break;
                    }
                    case QR_MODE_8B: {
                        $inputitem = $this->encodeMode8($inputitem, $version);

The method encodeMode8() does not exist on QRcode. Did you maybe mean encodeMask()?

                        break;
                    }
                    case QR_MODE_KJ: {
                        $inputitem = $this->encodeModeKanji($inputitem, $version);

The method encodeModeKanji() does not exist on QRcode.

                        break;
                    }
                    case QR_MODE_ST: {
                        $inputitem = $this->encodeModeStructure($inputitem);

The method encodeModeStructure() does not exist on QRcode.

                        break;
                    }
                    default: {
                        break;
                    }
                }
            }

            return $inputitem;
        }

        // - - - - - - - - - - - - - - - - - - - - - - - - -

        // QRinput

        /**
         * Append data to an input object.
         * The data is copied and appended to the input object.
         *
         * @param array items input items

The type items was not found. Maybe you did not declare it correctly or list all dependencies?

         * @param int   $mode encoding mode.
         * @param int   $size size of data (byte).
         * @param array $data array of input data.
         *
         * @return items
         */
        protected function appendNewInputItem($items, $mode, $size, $data)
        {
            $items[] = $this->newInputItem($mode, $size, $data);

            return $items;
        }

        /**
         * insertStructuredAppendHeader.
         *
         * @param array $items
         * @param int   $size
         * @param int   $index
         * @param int   $parity
         *
         * @return array items
         */
        protected function insertStructuredAppendHeader($items, $size, $index, $parity)
        {
            if ($size > MAX_STRUCTURED_SYMBOLS) {
                return -1;
            }
            if (($index <= 0) or ($index > MAX_STRUCTURED_SYMBOLS)) {
                return -1;
            }
            $buf = [$size, $index, $parity];

The assignment to $buf is dead and can be removed.

            $entry = $this->newInputItem(QR_MODE_ST, 3, buf);

The constant buf was not found. Maybe you did not declare it correctly or list all dependencies?

            array_unshift($items, $entry);

            return $items;
        }

        /**
         * calcParity.
         *
         * @param array $items
         *
         * @return int parity
         */
        protected function calcParity($items)
        {
            $parity = 0;
            foreach ($items as $item) {
                if ($item['mode'] != QR_MODE_ST) {
                    for ($i = $item['size'] - 1; $i >= 0; $i--) {
                        $parity ^= $item['data'][$i];
                    }
                }
            }

            return $parity;
        }

        /**
         * checkModeNum.
         *
         * @param int   $size
         * @param array $data
         *
         * @return bool true or false
         */
        protected function checkModeNum($size, $data)
        {
            for ($i = 0; $i < $size; $i++) {
                if ((ord($data[$i]) < ord('0')) or (ord($data[$i]) > ord('9'))) {
                    return false;
                }
            }

            return true;
        }

        /**
         * estimateBitsModeNum.
         *
         * @param int $size
         *
         * @return int number of bits
         */
        protected function estimateBitsModeNum($size)
        {
            $w = (int) $size / 3;
            $bits = $w * 10;
            switch ($size - $w * 3) {
                case 1: {
                    $bits += 4;
                    break;
                }
                case 2: {
                    $bits += 7;
                    break;
                }
                default: {
                    break;
                }
            }

            return $bits;
        }

        /**
         * Look up the alphabet-numeric convesion table (see JIS X0510:2004, pp.19).
         *
         * @param int $c character value
         *
         * @return value
         */
        protected function lookAnTable($c)
        {
            return ($c > 127) ? -1 : $this->anTable[$c];

The property anTable does not exist on QRcode. Did you maybe forget to declare it?

        }

        /**
         * checkModeAn.
         *
         * @param int   $size
         * @param array $data
         *
         * @return bool true or false
         */
        protected function checkModeAn($size, $data)
        {
            for ($i = 0; $i < $size; $i++) {
                if ($this->lookAnTable(ord($data[$i])) == -1) {
                    return false;
                }
            }

            return true;
        }

        /**
         * estimateBitsModeAn.
         *
         * @param int $size
         *
         * @return int number of bits
         */
        protected function estimateBitsModeAn($size)
        {
            $w = (int) ($size / 2);
            $bits = $w * 11;
            if ($size & 1) {
                $bits += 6;
            }

            return $bits;
        }

        /**
         * estimateBitsMode8.
         *
         * @param int $size
         *
         * @return int number of bits
         */
        protected function estimateBitsMode8($size)
        {
            return $size * 8;
        }

        /**
         * estimateBitsModeKanji.
         *
         * @param int $size
         *
         * @return int number of bits
         */
        protected function estimateBitsModeKanji($size)
        {
            return (int) (($size / 2) * 13);
        }

        /**
         * checkModeKanji.
         *
         * @param int   $size
         * @param array $data
         *
         * @return bool true or false
         */
        protected function checkModeKanji($size, $data)
        {
            if ($size & 1) {
                return false;
            }
            for ($i = 0; $i < $size; $i += 2) {
                $val = (ord($data[$i]) << 8) | ord($data[$i + 1]);
                if (($val < 0x8140) or (($val > 0x9ffc) and ($val < 0xe040)) or ($val > 0xebbf)) {
                    return false;
                }
            }

            return true;
        }

        /**
         * Validate the input data.
         *
         * @param int $mode encoding mode.
         * @param int $size size of data (byte).
         * @param array data data to validate
         *
         * @return bool true in case of valid data, false otherwise
         */
        protected function check($mode, $size, $data)
        {
            if ($size <= 0) {
                return false;
            }
            switch ($mode) {
                case QR_MODE_NM: {
                    return $this->checkModeNum($size, $data);

The method checkModeNum() does not exist on QRcode.

                }
                case QR_MODE_AN: {
                    return $this->checkModeAn($size, $data);

The method checkModeAn() does not exist on QRcode.

                }
                case QR_MODE_KJ: {
                    return $this->checkModeKanji($size, $data);

The method checkModeKanji() does not exist on QRcode.

                }
                case QR_MODE_8B: {
                    return true;
                }
                case QR_MODE_ST: {
                    return true;
                }
                default: {
                    break;
                }
            }

            return false;
        }

        /**
         * estimateBitStreamSize.
         *
         * @param array $items
         * @param int   $version
         *
         * @return int bits
         */
        protected function estimateBitStreamSize($items, $version)
        {
            $bits = 0;
            if ($version == 0) {
                $version = 1;
            }
            foreach ($items as $item) {
                switch ($item['mode']) {
                    case QR_MODE_NM: {
                        $bits = $this->estimateBitsModeNum($item['size']);
                        break;
                    }
                    case QR_MODE_AN: {
                        $bits = $this->estimateBitsModeAn($item['size']);
                        break;
                    }
                    case QR_MODE_8B: {
                        $bits = $this->estimateBitsMode8($item['size']);
                        break;
                    }
                    case QR_MODE_KJ: {
                        $bits = $this->estimateBitsModeKanji($item['size']);

The method estimateBitsModeKanji() does not exist on QRcode.

                        break;
                    }
                    case QR_MODE_ST: {
                        return STRUCTURE_HEADER_BITS;
                    }
                    default: {
                        return 0;
                    }
                }
                $l = $this->lengthIndicator($item['mode'], $version);
                $m = 1 << $l;
                $num = (int) (($item['size'] + $m - 1) / $m);
                $bits += $num * (4 + $l);
            }

            return $bits;
        }

        /**
         * estimateVersion.
         *
         * @param array $items
         *
         * @return int version
         */
        protected function estimateVersion($items)
        {
            $version = 0;
            $prev = 0;

The assignment to $prev is dead and can be removed.

            do {
                $prev = $version;
                $bits = $this->estimateBitStreamSize($items, $prev);

The method estimateBitStreamSize() does not exist on QRcode.

                $version = $this->getMinimumVersion((int) (($bits + 7) / 8), $this->level);

The property level does not exist on QRcode. Did you maybe forget to declare it?

The method getMinimumVersion() does not exist on QRcode.

                if ($version < 0) {
                    return -1;
                }
            } while ($version > $prev);

            return $version;
        }

        /**
         * lengthOfCode.
         *
         * @param int $mode
         * @param int $version
         * @param int $bits
         *
         * @return int size
         */
        protected function lengthOfCode($mode, $version, $bits)
        {
            $payload = $bits - 4 - $this->lengthIndicator($mode, $version);
            switch ($mode) {
                case QR_MODE_NM: {
                    $chunks = (int) ($payload / 10);
                    $remain = $payload - $chunks * 10;
                    $size = $chunks * 3;
                    if ($remain >= 7) {
                        $size += 2;
                    } elseif ($remain >= 4) {
                        $size += 1;
                    }
                    break;
                }
                case QR_MODE_AN: {
                    $chunks = (int) ($payload / 11);
                    $remain = $payload - $chunks * 11;
                    $size = $chunks * 2;
                    if ($remain >= 6) {
                        $size++;
                    }
                    break;
                }
                case QR_MODE_8B: {
                    $size = (int) ($payload / 8);
                    break;
                }
                case QR_MODE_KJ: {
                    $size = (int) (($payload / 13) * 2);
                    break;
                }
                case QR_MODE_ST: {
                    $size = (int) ($payload / 8);
                    break;
                }
                default: {
                    $size = 0;
                    break;
                }
            }
            $maxsize = $this->maximumWords($mode, $version);
            if ($size < 0) {
                $size = 0;
            }
            if ($size > $maxsize) {
                $size = $maxsize;
            }

            return $size;
        }

        /**
         * createBitStream.
         *
         * @param array $items
         *
         * @return array of items and total bits
         */
        protected function createBitStream($items)
        {
            $total = 0;
            foreach ($items as $key => $item) {
                $items[$key] = $this->encodeBitStream($item, $this->version);
                $bits = count($items[$key]['bstream']);
                $total += $bits;
            }

            return [$items, $total];
        }

        /**
         * convertData.
         *
         * @param array $items
         *
         * @return array items
         */
        protected function convertData($items)
        {
            $ver = $this->estimateVersion($items);

The method estimateVersion() does not exist on QRcode.

            if ($ver > $this->version) {
                $this->version = $ver;
            }
            for (; ;) {
                $cbs = $this->createBitStream($items);

The method createBitStream() does not exist on QRcode.

                $items = $cbs[0];
                $bits = $cbs[1];
                if ($bits < 0) {
                    return -1;
                }
                $ver = $this->getMinimumVersion((int) (($bits + 7) / 8), $this->level);

The property level does not exist on QRcode. Did you maybe forget to declare it?

                if ($ver < 0) {
                    return -1;
                } elseif ($ver > $this->version) {
                    $this->version = $ver;
                } else {
                    break;
                }
            }

            return $items;
        }

        /**
         * Append Padding Bit to bitstream.
         *
         * @param array $bstream
         *
         * @return array bitstream
         */
        protected function appendPaddingBit($bstream)
        {
            $bits = count($bstream);
            $maxwords = $this->getDataLength($this->version, $this->level);

The property level does not exist on QRcode. Did you maybe forget to declare it?

The method getDataLength() does not exist on QRcode.

            $maxbits = $maxwords * 8;
            if ($maxbits == $bits) {
                return 0;
            }
            if ($maxbits - $bits < 5) {
                return $this->appendNum($bstream, $maxbits - $bits, 0);
            }
            $bits += 4;
            $words = (int) (($bits + 7) / 8);
            $padding = [];
            $padding = $this->appendNum($padding, $words * 8 - $bits + 4, 0);
            $padlen = $maxwords - $words;
            if ($padlen > 0) {
                $padbuf = [];
                for ($i = 0; $i < $padlen; $i++) {
                    $padbuf[$i] = ($i & 1) ? 0x11 : 0xec;
                }
                $padding = $this->appendBytes($padding, $padlen, $padbuf);

The method appendBytes() does not exist on QRcode.

            }

            return $this->appendBitstream($bstream, $padding);
        }

        /**
         * mergeBitStream.
         *
         * @param array $bstream
         *
         * @return array bitstream
         */
        protected function mergeBitStream($items)
        {
            $items = $this->convertData($items);

The method convertData() does not exist on QRcode.

            $bstream = [];
            foreach ($items as $item) {
                $bstream = $this->appendBitstream($bstream, $item['bstream']);
            }

            return $bstream;
        }

        /**
         * Returns a stream of bits.
         *
         * @param int $items
         *
         * @return array padded merged byte stream
         */
        protected function getBitStream($items)
        {
            $bstream = $this->mergeBitStream($items);

The method mergeBitStream() does not exist on QRcode.

            return $this->appendPaddingBit($bstream);

The method appendPaddingBit() does not exist on QRcode.

        }

        /**
         * Pack all bit streams padding bits into a byte array.
         *
         * @param int $items
         *
         * @return array padded merged byte stream
         */
        protected function getByteStream($items)
        {
            $bstream = $this->getBitStream($items);

The method getBitStream() does not exist on QRcode.

            return $this->bitstreamToByte($bstream);

The method bitstreamToByte() does not exist on QRcode.

        }

        // - - - - - - - - - - - - - - - - - - - - - - - - -

        // QRbitstream

        /**
         * Return an array with zeros.
         *
         * @param int $setLength array size
         *
         * @return array
         */
        protected function allocate($setLength)
        {
            return array_fill(0, $setLength, 0);
        }

        /**
         * Return new bitstream from number.
         *
         * @param int $bits number of bits
         * @param int $num  number
         *
         * @return array bitstream
         */
        protected function newFromNum($bits, $num)
        {
            $bstream = $this->allocate($bits);

The method allocate() does not exist on QRcode.

            $mask = 1 << ($bits - 1);
            for ($i = 0; $i < $bits; $i++) {
                if ($num & $mask) {
                    $bstream[$i] = 1;
                } else {
                    $bstream[$i] = 0;
                }
                $mask = $mask >> 1;
            }

            return $bstream;
        }

        /**
         * Return new bitstream from bytes.
         *
         * @param int   $size size
         * @param array $data bytes
         *
         * @return array bitstream
         */
        protected function newFromBytes($size, $data)
        {
            $bstream = $this->allocate($size * 8);
            $p = 0;
            for ($i = 0; $i < $size; $i++) {
                $mask = 0x80;
                for ($j = 0; $j < 8; $j++) {
                    if ($data[$i] & $mask) {
                        $bstream[$p] = 1;
                    } else {
                        $bstream[$p] = 0;
                    }
                    $p++;
                    $mask = $mask >> 1;
                }
            }

            return $bstream;
        }

        /**
         * Append one bitstream to another.
         *
         * @param array $bitstream original bitstream
         * @param array $append    bitstream to append
         *
         * @return array bitstream
         */
        protected function appendBitstream($bitstream, $append)
        {
            if ((!is_array($append)) or (count($append) == 0)) {

The condition is_array($append) is always true.

                return $bitstream;
            }
            if (count($bitstream) == 0) {
                return $append;
            }

            return array_values(array_merge($bitstream, $append));
        }

        /**
         * Append one bitstream created from number to another.
         *
         * @param array $bitstream original bitstream
         * @param int   $bits      number of bits
         * @param int   $num       number
         *
         * @return array bitstream
         */
        protected function appendNum($bitstream, $bits, $num)
        {
            if ($bits == 0) {
                return 0;
            }
            $b = $this->newFromNum($bits, $num);

The method newFromNum() does not exist on QRcode.

            return $this->appendBitstream($bitstream, $b);
        }

        /**
         * Append one bitstream created from bytes to another.
         *
         * @param array $bitstream original bitstream
         * @param int   $size      size
         * @param array $data      bytes
         *
         * @return array bitstream
         */
        protected function appendBytes($bitstream, $size, $data)
        {
            if ($size == 0) {
                return 0;
            }
            $b = $this->newFromBytes($size, $data);

The method newFromBytes() does not exist on QRcode.

            return $this->appendBitstream($bitstream, $b);
        }

        /**
         * Convert bitstream to bytes.
         *
         * @param array $bitstream original bitstream
         *
         * @return array of bytes
         */
        protected function bitstreamToByte($bstream)
        {
            $size = count($bstream);
            if ($size == 0) {
                return [];
            }
            $data = array_fill(0, (int) (($size + 7) / 8), 0);
            $bytes = (int) ($size / 8);
            $p = 0;
            for ($i = 0; $i < $bytes; $i++) {
                $v = 0;
                for ($j = 0; $j < 8; $j++) {
                    $v = $v << 1;
                    $v |= $bstream[$p];
                    $p++;
                }
                $data[$i] = $v;
            }
            if ($size & 7) {
                $v = 0;
                for ($j = 0; $j < ($size & 7); $j++) {
                    $v = $v << 1;
                    $v |= $bstream[$p];
                    $p++;
                }
                $data[$bytes] = $v;
            }

            return $data;
        }

        // - - - - - - - - - - - - - - - - - - - - - - - - -

        // QRspec

        /**
         * Replace a value on the array at the specified position.
         *
         * @param array  $srctab
         * @param int    $x       X position
         * @param int    $y       Y position
         * @param string $repl    value to replace
         * @param int    $replLen length of the repl string
         *
         * @return array srctab
         */
        protected function qrstrset($srctab, $x, $y, $repl, $replLen = false)
        {
            $srctab[$y] = substr_replace($srctab[$y], ($replLen !== false) ? substr($repl, 0, $replLen) : $repl, $x, ($replLen !== false) ? $replLen : strlen($repl));

            return $srctab;
        }

        /**
         * Return maximum data code length (bytes) for the version.
         *
         * @param int $version version
         * @param int $level   error correction level
         *
         * @return int maximum size (bytes)
         */
        protected function getDataLength($version, $level)
        {
            return $this->capacity[$version][QRCAP_WORDS] - $this->capacity[$version][QRCAP_EC][$level];

The property capacity does not exist on QRcode. Did you maybe forget to declare it?

        }

        /**
         * Return maximum error correction code length (bytes) for the version.
         *
         * @param int $version version
         * @param int $level   error correction level
         *
         * @return int ECC size (bytes)
         */
        protected function getECCLength($version, $level)
        {
            return $this->capacity[$version][QRCAP_EC][$level];

The property capacity does not exist on QRcode. Did you maybe forget to declare it?

        }

        /**
         * Return the width of the symbol for the version.
         *
         * @param int $version version
         *
         * @return int width
         */
        protected function getWidth($version)
        {
            return $this->capacity[$version][QRCAP_WIDTH];

The property capacity does not exist on QRcode. Did you maybe forget to declare it?

        }

        /**
         * Return the numer of remainder bits.
         *
         * @param int $version version
         *
         * @return int number of remainder bits
         */
        protected function getRemainder($version)
        {
            return $this->capacity[$version][QRCAP_REMINDER];

The property capacity does not exist on QRcode. Did you maybe forget to declare it?

        }

        /**
         * Return a version number that satisfies the input code length.
         *
         * @param int $size  input code length (byte)
         * @param int $level error correction level
         *
         * @return int version number
         */
        protected function getMinimumVersion($size, $level)
        {
            for ($i = 1; $i <= QRSPEC_VERSION_MAX; $i++) {
                $words = $this->capacity[$i][QRCAP_WORDS] - $this->capacity[$i][QRCAP_EC][$level];

The property capacity does not exist on QRcode. Did you maybe forget to declare it?

                if ($words >= $size) {
                    return $i;
                }
            }

            return -1;
        }

        /**
         * Return the size of length indicator for the mode and version.
         *
         * @param int $mode    encoding mode
         * @param int $version version
         *
         * @return int the size of the appropriate length indicator (bits).
         */
        protected function lengthIndicator($mode, $version)
        {
            if ($mode == QR_MODE_ST) {
                return 0;
            }
            if ($version <= 9) {
                $l = 0;
            } elseif ($version <= 26) {
                $l = 1;
            } else {
                $l = 2;
            }

            return $this->lengthTableBits[$mode][$l];

The property lengthTableBits does not exist on QRcode. Did you maybe forget to declare it?

        }

        /**
         * Return the maximum length for the mode and version.
         *
         * @param int $mode    encoding mode
         * @param int $version version
         *
         * @return int the maximum length (bytes)
         */
        protected function maximumWords($mode, $version)
        {
            if ($mode == QR_MODE_ST) {
                return 3;
            }
            if ($version <= 9) {
                $l = 0;
            } elseif ($version <= 26) {
                $l = 1;
            } else {
                $l = 2;
            }
            $bits = $this->lengthTableBits[$mode][$l];

The property lengthTableBits does not exist on QRcode. Did you maybe forget to declare it?

            $words = (1 << $bits) - 1;
            if ($mode == QR_MODE_KJ) {
                $words *= 2; // the number of bytes is required
            }

            return $words;
        }

        /**
         * Return an array of ECC specification.
         *
         * @param int   $version version
         * @param int   $level   error correction level
         * @param array $spec    an array of ECC specification contains as following: {# of type1 blocks, # of data code, # of ecc code, # of type2 blocks, # of data code}
         *
         * @return array spec
         */
        protected function getEccSpec($version, $level, $spec)
        {
            if (count($spec) < 5) {
                $spec = [0, 0, 0, 0, 0];
            }
            $b1 = $this->eccTable[$version][$level][0];

The property eccTable does not exist on QRcode. Did you maybe forget to declare it?

            $b2 = $this->eccTable[$version][$level][1];
            $data = $this->getDataLength($version, $level);
            $ecc = $this->getECCLength($version, $level);

The method getECCLength() does not exist on QRcode.

            if ($b2 == 0) {
                $spec[0] = $b1;
                $spec[1] = (int) ($data / $b1);
                $spec[2] = (int) ($ecc / $b1);
                $spec[3] = 0;
                $spec[4] = 0;
            } else {
                $spec[0] = $b1;
                $spec[1] = (int) ($data / ($b1 + $b2));
                $spec[2] = (int) ($ecc / ($b1 + $b2));
                $spec[3] = $b2;
                $spec[4] = $spec[1] + 1;
            }

            return $spec;
        }

        /**
         * Put an alignment marker.
         *
         * @param array $frame frame
         * @param int   $width width
         * @param int   $ox    X center coordinate of the pattern
         * @param int   $oy    Y center coordinate of the pattern
         *
         * @return array frame
         */
        protected function putAlignmentMarker($frame, $ox, $oy)
        {
            $finder = [
                "\xa1\xa1\xa1\xa1\xa1",
                "\xa1\xa0\xa0\xa0\xa1",
                "\xa1\xa0\xa1\xa0\xa1",
                "\xa1\xa0\xa0\xa0\xa1",
                "\xa1\xa1\xa1\xa1\xa1",
                ];
            $yStart = $oy - 2;
            $xStart = $ox - 2;
            for ($y = 0; $y < 5; $y++) {
                $frame = $this->qrstrset($frame, $xStart, $yStart + $y, $finder[$y]);

The method qrstrset() does not exist on QRcode.

            }

            return $frame;
        }

        /**
         * Put an alignment pattern.
         *
         * @param int   $version version
         * @param array $fram    frame
         * @param int   $width   width
         *
         * @return array frame
         */
        protected function putAlignmentPattern($version, $frame, $width)
        {
            if ($version < 2) {
                return $frame;
            }
            $d = $this->alignmentPattern[$version][1] - $this->alignmentPattern[$version][0];

The property alignmentPattern does not exist on QRcode. Did you maybe forget to declare it?

            if ($d < 0) {
                $w = 2;
            } else {
                $w = (int) (($width - $this->alignmentPattern[$version][0]) / $d + 2);
            }
            if ($w * $w - 3 == 1) {
                $x = $this->alignmentPattern[$version][0];
                $y = $this->alignmentPattern[$version][0];
                $frame = $this->putAlignmentMarker($frame, $x, $y);

The method putAlignmentMarker() does not exist on QRcode.

                return $frame;
            }
            $cx = $this->alignmentPattern[$version][0];
            $wo = $w - 1;
            for ($x = 1; $x < $wo; $x++) {
                $frame = $this->putAlignmentMarker($frame, 6, $cx);
                $frame = $this->putAlignmentMarker($frame, $cx, 6);
                $cx += $d;
            }
            $cy = $this->alignmentPattern[$version][0];
            for ($y = 0; $y < $wo; $y++) {
                $cx = $this->alignmentPattern[$version][0];
                for ($x = 0; $x < $wo; $x++) {
                    $frame = $this->putAlignmentMarker($frame, $cx, $cy);
                    $cx += $d;
                }
                $cy += $d;
            }

            return $frame;
        }

        /**
         * Return BCH encoded version information pattern that is used for the symbol of version 7 or greater. Use lower 18 bits.
         *
         * @param int $version version
         *
         * @return BCH encoded version information pattern

The type BCH was not found. Maybe you did not declare it correctly or list all dependencies?

         */
        protected function getVersionPattern($version)
        {
            if (($version < 7) or ($version > QRSPEC_VERSION_MAX)) {
                return 0;
            }

            return $this->versionPattern[($version - 7)];

The property versionPattern does not exist on QRcode. Did you mean version?

        }

        /**
         * Return BCH encoded format information pattern.
         *
         * @param array $mask
         * @param int   $level error correction level
         *
         * @return BCH encoded format information pattern
         */
        protected function getFormatInfo($mask, $level)
        {
            if (($mask < 0) or ($mask > 7)) {
                return 0;
            }
            if (($level < 0) or ($level > 3)) {
                return 0;
            }

            return $this->formatInfo[$level][$mask];

The property formatInfo does not exist on QRcode. Did you maybe forget to declare it?

        }

        /**
         * Put a finder pattern.
         *
         * @param array $frame frame
         * @param int   $width width
         * @param int   $ox    X center coordinate of the pattern
         * @param int   $oy    Y center coordinate of the pattern
         *
         * @return array frame
         */
        protected function putFinderPattern($frame, $ox, $oy)
        {
            $finder = [
            "\xc1\xc1\xc1\xc1\xc1\xc1\xc1",
            "\xc1\xc0\xc0\xc0\xc0\xc0\xc1",
            "\xc1\xc0\xc1\xc1\xc1\xc0\xc1",
            "\xc1\xc0\xc1\xc1\xc1\xc0\xc1",
            "\xc1\xc0\xc1\xc1\xc1\xc0\xc1",
            "\xc1\xc0\xc0\xc0\xc0\xc0\xc1",
            "\xc1\xc1\xc1\xc1\xc1\xc1\xc1",
            ];
            for ($y = 0; $y < 7; $y++) {
                $frame = $this->qrstrset($frame, $ox, ($oy + $y), $finder[$y]);
            }

            return $frame;
        }

        /**
         * Return a copy of initialized frame.
         *
         * @param int $version version
         *
         * @return array of unsigned char.
         */
        protected function createFrame($version)
        {
            $width = $this->capacity[$version][QRCAP_WIDTH];

The property capacity does not exist on QRcode. Did you maybe forget to declare it?

            $frameLine = str_repeat("\0", $width);
            $frame = array_fill(0, $width, $frameLine);
            // Finder pattern
            $frame = $this->putFinderPattern($frame, 0, 0);

The method putFinderPattern() does not exist on QRcode.

            $frame = $this->putFinderPattern($frame, $width - 7, 0);
            $frame = $this->putFinderPattern($frame, 0, $width - 7);
            // Separator
            $yOffset = $width - 7;
            for ($y = 0; $y < 7; $y++) {
                $frame[$y][7] = "\xc0";
                $frame[$y][$width - 8] = "\xc0";
                $frame[$yOffset][7] = "\xc0";
                $yOffset++;
            }
            $setPattern = str_repeat("\xc0", 8);
            $frame = $this->qrstrset($frame, 0, 7, $setPattern);
            $frame = $this->qrstrset($frame, $width - 8, 7, $setPattern);
            $frame = $this->qrstrset($frame, 0, $width - 8, $setPattern);
            // Format info
            $setPattern = str_repeat("\x84", 9);
            $frame = $this->qrstrset($frame, 0, 8, $setPattern);
            $frame = $this->qrstrset($frame, $width - 8, 8, $setPattern, 8);
            $yOffset = $width - 8;
            for ($y = 0; $y < 8; ++$y, ++$yOffset) {
                $frame[$y][8] = "\x84";
                $frame[$yOffset][8] = "\x84";
            }
            // Timing pattern
            $wo = $width - 15;
            for ($i = 1; $i < $wo; $i++) {
                $frame[6][7 + $i] = chr(0x90 | ($i & 1));
                $frame[7 + $i][6] = chr(0x90 | ($i & 1));
            }
            // Alignment pattern
            $frame = $this->putAlignmentPattern($version, $frame, $width);

The method putAlignmentPattern() does not exist on QRcode.

            // Version information
            if ($version >= 7) {
                $vinf = $this->getVersionPattern($version);

The method getVersionPattern() does not exist on QRcode.

                $v = $vinf;
                for ($x = 0; $x < 6; $x++) {
                    for ($y = 0; $y < 3; $y++) {
                        $frame[($width - 11) + $y][$x] = chr(0x88 | ($v & 1));
                        $v = $v >> 1;
                    }
                }
                $v = $vinf;
                for ($y = 0; $y < 6; $y++) {
                    for ($x = 0; $x < 3; $x++) {
                        $frame[$y][$x + ($width - 11)] = chr(0x88 | ($v & 1));
                        $v = $v >> 1;
                    }
                }
            }
            // and a little bit...
            $frame[$width - 8][8] = "\x81";

            return $frame;
        }

        /**
         * Set new frame for the specified version.
         *
         * @param int $version version
         *
         * @return array of unsigned char.
         */
        protected function newFrame($version)
        {
            if (($version < 1) or ($version > QRSPEC_VERSION_MAX)) {
                return;
            }
            if (!isset($this->frames[$version])) {

The property frames does not exist on QRcode. Did you maybe forget to declare it?

                $this->frames[$version] = $this->createFrame($version);

The method createFrame() does not exist on QRcode.

            }
            if (is_null($this->frames[$version])) {
                return;
            }

            return $this->frames[$version];
        }

        /**
         * Return block number 0.
         *
         * @param array $spec
         *
         * @return int value
         */
        protected function rsBlockNum($spec)
        {
            return $spec[0] + $spec[3];
        }

        /**
         * Return block number 1.
         *
         * @param array $spec
         *
         * @return int value
         */
        protected function rsBlockNum1($spec)
        {
            return $spec[0];
        }

        /**
         * Return data codes 1.
         *
         * @param array $spec
         *
         * @return int value
         */
        protected function rsDataCodes1($spec)
        {
            return $spec[1];
        }

        /**
         * Return ecc codes 1.
         *
         * @param array $spec
         *
         * @return int value
         */
        protected function rsEccCodes1($spec)
        {
            return $spec[2];
        }

        /**
         * Return block number 2.
         *
         * @param array $spec
         *
         * @return int value
         */
        protected function rsBlockNum2($spec)
        {
            return $spec[3];
        }

        /**
         * Return data codes 2.
         *
         * @param array $spec
         *
         * @return int value
         */
        protected function rsDataCodes2($spec)
        {
            return $spec[4];
        }

        /**
         * Return ecc codes 2.
         *
         * @param array $spec
         *
         * @return int value
         */
        protected function rsEccCodes2($spec)
        {
            return $spec[2];
        }

        /**
         * Return data length.
         *
         * @param array $spec
         *
         * @return int value
         */
        protected function rsDataLength($spec)
        {
            return ($spec[0] * $spec[1]) + ($spec[3] * $spec[4]);
        }

        /**
         * Return ecc length.
         *
         * @param array $spec
         *
         * @return int value
         */
        protected function rsEccLength($spec)
        {
            return ($spec[0] + $spec[3]) * $spec[2];
        }

        // - - - - - - - - - - - - - - - - - - - - - - - - -

        // QRrs

        /**
         * Initialize a Reed-Solomon codec and add it to existing rsitems.
         *
         * @param int $symsize symbol size, bits
         * @param int $gfpoly  Field generator polynomial coefficients
         * @param int $fcr     first root of RS code generator polynomial, index form
         * @param int $prim    primitive element to generate polynomial roots
         * @param int $nroots  RS code generator polynomial degree (number of roots)
         * @param int $pad     padding bytes at front of shortened block
         *
         * @return array Array of RS values:<ul><li>mm = Bits per symbol;</li><li>nn = Symbols per block;</li><li>alpha_to = log lookup table array;</li><li>index_of = Antilog lookup table array;</li><li>genpoly = Generator polynomial array;</li><li>nroots = Number of generator;</li><li>roots = number of parity symbols;</li><li>fcr = First consecutive root, index form;</li><li>prim = Primitive element, index form;</li><li>iprim = prim-th root of 1, index form;</li><li>pad = Padding bytes in shortened block;</li><li>gfpoly</ul>.
         */
        protected function init_rs($symsize, $gfpoly, $fcr, $prim, $nroots, $pad)
        {
            foreach ($this->rsitems as $rs) {

The property rsitems does not exist on QRcode. Did you maybe forget to declare it?

                if (($rs['pad'] != $pad) or ($rs['nroots'] != $nroots) or ($rs['mm'] != $symsize)
                    or ($rs['gfpoly'] != $gfpoly) or ($rs['fcr'] != $fcr) or ($rs['prim'] != $prim)) {
                    continue;
                }

                return $rs;
            }
            $rs = $this->init_rs_char($symsize, $gfpoly, $fcr, $prim, $nroots, $pad);

The method init_rs_char() does not exist on QRcode.

            array_unshift($this->rsitems, $rs);

            return $rs;
        }

        // - - - - - - - - - - - - - - - - - - - - - - - - -

        // QRrsItem

        /**
         * modnn.
         *
         * @param array RS values

The type RS was not found. Maybe you did not declare it correctly or list all dependencies?

         * @param int $x X position
         *
         * @return int X osition
         */
        protected function modnn($rs, $x)
        {
            while ($x >= $rs['nn']) {
                $x -= $rs['nn'];
                $x = ($x >> $rs['mm']) + ($x & $rs['nn']);
            }

            return $x;
        }

        /**
         * Initialize a Reed-Solomon codec and returns an array of values.
         *
         * @param int $symsize symbol size, bits
         * @param int $gfpoly  Field generator polynomial coefficients
         * @param int $fcr     first root of RS code generator polynomial, index form
         * @param int $prim    primitive element to generate polynomial roots
         * @param int $nroots  RS code generator polynomial degree (number of roots)
         * @param int $pad     padding bytes at front of shortened block
         *
         * @return array Array of RS values:<ul><li>mm = Bits per symbol;</li><li>nn = Symbols per block;</li><li>alpha_to = log lookup table array;</li><li>index_of = Antilog lookup table array;</li><li>genpoly = Generator polynomial array;</li><li>nroots = Number of generator;</li><li>roots = number of parity symbols;</li><li>fcr = First consecutive root, index form;</li><li>prim = Primitive element, index form;</li><li>iprim = prim-th root of 1, index form;</li><li>pad = Padding bytes in shortened block;</li><li>gfpoly</ul>.
         */
        protected function init_rs_char($symsize, $gfpoly, $fcr, $prim, $nroots, $pad)
        {
            // Based on Reed solomon encoder by Phil Karn, KA9Q (GNU-LGPLv2)
            $rs = null;
            // Check parameter ranges
            if (($symsize < 0) or ($symsize > 8)) {
                return $rs;
            }
            if (($fcr < 0) or ($fcr >= (1 << $symsize))) {
                return $rs;
            }
            if (($prim <= 0) or ($prim >= (1 << $symsize))) {
                return $rs;
            }
            if (($nroots < 0) or ($nroots >= (1 << $symsize))) {
                return $rs;
            }
            if (($pad < 0) or ($pad >= ((1 << $symsize) - 1 - $nroots))) {
                return $rs;
            }
            $rs = [];
            $rs['mm'] = $symsize;
            $rs['nn'] = (1 << $symsize) - 1;
            $rs['pad'] = $pad;
            $rs['alpha_to'] = array_fill(0, ($rs['nn'] + 1), 0);
            $rs['index_of'] = array_fill(0, ($rs['nn'] + 1), 0);
            // PHP style macro replacement ;)
            $NN = &$rs['nn'];
            $A0 = &$NN;
            // Generate Galois field lookup tables
            $rs['index_of'][0] = $A0; // log(zero) = -inf
            $rs['alpha_to'][$A0] = 0; // alpha**-inf = 0
            $sr = 1;
            for ($i = 0; $i < $rs['nn']; $i++) {
                $rs['index_of'][$sr] = $i;
                $rs['alpha_to'][$i] = $sr;
                $sr <<= 1;
                if ($sr & (1 << $symsize)) {
                    $sr ^= $gfpoly;
                }
                $sr &= $rs['nn'];
            }
            if ($sr != 1) {
                // field generator polynomial is not primitive!
                return;
            }
            // Form RS code generator polynomial from its roots
            $rs['genpoly'] = array_fill(0, ($nroots + 1), 0);
            $rs['fcr'] = $fcr;
            $rs['prim'] = $prim;
            $rs['nroots'] = $nroots;
            $rs['gfpoly'] = $gfpoly;
            // Find prim-th root of 1, used in decoding
            for ($iprim = 1; ($iprim % $prim) != 0; $iprim += $rs['nn']) {
                // intentional empty-body loop!
            }
            $rs['iprim'] = (int) ($iprim / $prim);
            $rs['genpoly'][0] = 1;

            for ($i = 0, $root = $fcr * $prim; $i < $nroots; $i++, $root += $prim) {
                $rs['genpoly'][$i + 1] = 1;
                // Multiply rs->genpoly[] by  @**(root + x)
                for ($j = $i; $j > 0; $j--) {
                    if ($rs['genpoly'][$j] != 0) {
                        $rs['genpoly'][$j] = $rs['genpoly'][$j - 1] ^ $rs['alpha_to'][$this->modnn($rs, $rs['index_of'][$rs['genpoly'][$j]] + $root)];

The method modnn() does not exist on QRcode.

                    } else {
                        $rs['genpoly'][$j] = $rs['genpoly'][$j - 1];
                    }
                }
                // rs->genpoly[0] can never be zero
                $rs['genpoly'][0] = $rs['alpha_to'][$this->modnn($rs, $rs['index_of'][$rs['genpoly'][0]] + $root)];
            }
            // convert rs->genpoly[] to index form for quicker encoding
            for ($i = 0; $i <= $nroots; $i++) {
                $rs['genpoly'][$i] = $rs['index_of'][$rs['genpoly'][$i]];
            }

            return $rs;
        }

        /**
         * Encode a Reed-Solomon codec and returns the parity array.
         *
         * @param array $rs     RS values
         * @param array $data   data
         * @param array $parity parity
         *
         * @return parity array

The type parity was not found. Maybe you did not declare it correctly or list all dependencies?

         */
        protected function encode_rs_char($rs, $data, $parity)
        {
            $MM = &$rs['mm']; // bits per symbol

The assignment to $MM is dead and can be removed.

            $NN = &$rs['nn']; // the total number of symbols in a RS block
            $ALPHA_TO = &$rs['alpha_to']; // the address of an array of NN elements to convert Galois field elements in index (log) form to polynomial form
            $INDEX_OF = &$rs['index_of']; // the address of an array of NN elements to convert Galois field elements in polynomial form to index (log) form
            $GENPOLY = &$rs['genpoly']; // an array of NROOTS+1 elements containing the generator polynomial in index form
            $NROOTS = &$rs['nroots']; // the number of roots in the RS code generator polynomial, which is the same as the number of parity symbols in a block
            $FCR = &$rs['fcr']; // first consecutive root, index form

The assignment to $FCR is dead and can be removed.

            $PRIM = &$rs['prim']; // primitive element, index form

The assignment to $PRIM is dead and can be removed.

            $IPRIM = &$rs['iprim']; // prim-th root of 1, index form

The assignment to $IPRIM is dead and can be removed.

            $PAD = &$rs['pad']; // the number of pad symbols in a block
            $A0 = &$NN;
            $parity = array_fill(0, $NROOTS, 0);
            for ($i = 0; $i < ($NN - $NROOTS - $PAD); $i++) {
                $feedback = $INDEX_OF[$data[$i] ^ $parity[0]];
                if ($feedback != $A0) {
                    // feedback term is non-zero
                    // This line is unnecessary when GENPOLY[NROOTS] is unity, as it must
                    // always be for the polynomials constructed by init_rs()
                    $feedback = $this->modnn($rs, $NN - $GENPOLY[$NROOTS] + $feedback);
                    for ($j = 1; $j < $NROOTS; $j++) {
                        $parity[$j] ^= $ALPHA_TO[$this->modnn($rs, $feedback + $GENPOLY[($NROOTS - $j)])];
                    }
                }
                // Shift
                array_shift($parity);
                if ($feedback != $A0) {
                    array_push($parity, $ALPHA_TO[$this->modnn($rs, $feedback + $GENPOLY[0])]);
                } else {
                    array_push($parity, 0);
                }
            }

            return $parity;
        }
    } // end QRcode class
} // END OF "class_exists QRcode"