codysnider / tt-rss

lib/phpqrcode/phpqrcode.php

<?php


/*

 * PHP QR Code encoder

 *

 * This file contains MERGED version of PHP QR Code library.

 * It was auto-generated from full version for your convenience.

 *

 * This merged version was configured to not requre any external files,

 * with disabled cache, error loging and weker but faster mask matching.

 * If you need tune it up please use non-merged version.

 *

 * For full version, documentation, examples of use please visit:

 *

 *    http://phpqrcode.sourceforge.net/

 *    https://sourceforge.net/projects/phpqrcode/

 *

 * PHP QR Code is distributed under LGPL 3

 * Copyright (C) 2010 Dominik Dzienia <deltalab at poczta dot fm>

 *

 * 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

 */

 

 

/*
 * Version: 1.1.4
 * Build: 2010100721
 */



//---- qrconst.php -----------------------------





/*

 * PHP QR Code encoder

 *

 * Common constants

 *

 * Based on libqrencode C library distributed under LGPL 2.1

 * Copyright (C) 2006, 2007, 2008, 2009 Kentaro Fukuchi <fukuchi@megaui.net>

 *

 * PHP QR Code is distributed under LGPL 3

 * Copyright (C) 2010 Dominik Dzienia <deltalab at poczta dot fm>

 *

 * 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

 */

 

    // Encoding modes

	 

    define('QR_MODE_NUL', -1);

    define('QR_MODE_NUM', 0);

    define('QR_MODE_AN', 1);

    define('QR_MODE_8', 2);

    define('QR_MODE_KANJI', 3);

    define('QR_MODE_STRUCTURE', 4);


    // Levels of error correction.


    define('QR_ECLEVEL_L', 0);

    define('QR_ECLEVEL_M', 1);

    define('QR_ECLEVEL_Q', 2);

    define('QR_ECLEVEL_H', 3);

	

    // Supported output formats

	

    define('QR_FORMAT_TEXT', 0);

    define('QR_FORMAT_PNG', 1);

	

    class qrstr {

        public static function set(&$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));

        }

    }	



//---- merged_config.php -----------------------------




/*

 * PHP QR Code encoder

 *

 * Config file, tuned-up for merged verion

 */

     

    define('QR_CACHEABLE', false); // use cache - more disk reads but less CPU power, masks and format templates are stored there

    define('QR_CACHE_DIR', false); // used when QR_CACHEABLE === true

    define('QR_LOG_DIR', false); // default error logs dir   

    

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

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

                                                  

    define('QR_PNG_MAXIMUM_SIZE', 1024); // maximum allowed png image width (in pixels), tune to make sure GD and PHP can handle such big images

                                                  



//---- qrtools.php -----------------------------




/*

 * PHP QR Code encoder

 *

 * Toolset, handy and debug utilites.

 *

 * PHP QR Code is distributed under LGPL 3

 * Copyright (C) 2010 Dominik Dzienia <deltalab at poczta dot fm>

 *

 * 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

 */


    class QRtools {

    

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

        public static function binarize($frame)

        {

            $len = count($frame);

            foreach ($frame as &$frameLine) {

                

                for ($i = 0; $i < $len; $i++) {

                    $frameLine[$i] = (ord($frameLine[$i]) & 1) ? '1' : '0';

                }

            }

            

            return $frame;

        }

        

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

        public static function tcpdfBarcodeArray($code, $mode = 'QR,L', $tcPdfVersion = '4.5.037')

The parameter $tcPdfVersion is not used and could be removed.

        {

            $barcode_array = array();

            

            if (!is_array($mode)) {
                            $mode = explode(',', $mode);
            }
                

            $eccLevel = 'L';

                

            if (count($mode) > 1) {

                $eccLevel = $mode[1];

            }

                

            $qrTab = QRcode::text($code, false, $eccLevel);

            $size = count($qrTab);

                

            $barcode_array['num_rows'] = $size;

            $barcode_array['num_cols'] = $size;

            $barcode_array['bcode'] = array();

                

            foreach ($qrTab as $line) {

                $arrAdd = array();

                foreach (str_split($line) as $char) {
                                    $arrAdd[] = ($char == '1') ? 1 : 0;
                }
                $barcode_array['bcode'][] = $arrAdd;

            }

                    

            return $barcode_array;

        }

        

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

        public static function clearCache()

        {

            self::$frames = array();

The property frames does not exist. Although not strictly required by PHP, it is generally a best practice to declare properties explicitly.

        }

        

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

        public static function buildCache()

        {

            QRtools::markTime('before_build_cache');

			

            $mask = new QRmask();

            for ($a = 1; $a <= QRSPEC_VERSION_MAX; $a++) {

                $frame = QRspec::newFrame($a);

                if (QR_IMAGE) {

                    $fileName = QR_CACHE_DIR.'frame_'.$a.'.png';

                    QRimage::png(self::binarize($frame), $fileName, 1, 0);

                }

				

                $width = count($frame);

                $bitMask = array_fill(0, $width, array_fill(0, $width, 0));

                for ($maskNo = 0; $maskNo < 8; $maskNo++) {
                                    $mask->makeMaskNo($maskNo, $width, $frame, $bitMask, true);
                }
            }

			

            QRtools::markTime('after_build_cache');

        }


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

        public static function log($outfile, $err)

        {

            if (QR_LOG_DIR !== false) {

                if ($err != '') {

                    if ($outfile !== false) {

                        file_put_contents(QR_LOG_DIR.basename($outfile).'-errors.txt', date('Y-m-d H:i:s').': '.$err, FILE_APPEND);

                    } else {

                        file_put_contents(QR_LOG_DIR.'errors.txt', date('Y-m-d H:i:s').': '.$err, FILE_APPEND);

                    }

                }    

            }

        }

        

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

        public static function dumpMask($frame) 

        {

            $width = count($frame);

            for ($y = 0; $y < $width; $y++) {

                for ($x = 0; $x < $width; $x++) {

                    echo ord($frame[$y][$x]).',';

                }

            }

        }

        

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

        public static function markTime($markerId)

        {

            list($usec, $sec) = explode(" ", microtime());

            $time = ((float) $usec + (float) $sec);

            

            if (!isset($GLOBALS['qr_time_bench'])) {
                            $GLOBALS['qr_time_bench'] = array();
            }
            

            $GLOBALS['qr_time_bench'][$markerId] = $time;

        }

        

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

        public static function timeBenchmark()

        {

            self::markTime('finish');

        

            $lastTime = 0;

            $startTime = 0;

            $p = 0;


            echo '<table cellpadding="3" cellspacing="1">

                    <thead><tr style="border-bottom:1px solid silver"><td colspan="2" style="text-align:center">BENCHMARK</td></tr></thead>

                    <tbody>';


            foreach ($GLOBALS['qr_time_bench'] as $markerId=>$thisTime) {

                if ($p > 0) {

                    echo '<tr><th style="text-align:right">till '.$markerId.': </th><td>'.number_format($thisTime - $lastTime, 6).'s</td></tr>';

                } else {

                    $startTime = $thisTime;

                }

                

                $p++;

                $lastTime = $thisTime;

            }

            

            echo '</tbody><tfoot>

                <tr style="border-top:2px solid black"><th style="text-align:right">TOTAL: </th><td>'.number_format($lastTime - $startTime, 6).'s</td></tr>

            </tfoot>

            </table>';

        }

        

    }

    

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

    

    QRtools::markTime('start');

    



//---- qrspec.php -----------------------------




/*

 * PHP QR Code encoder

 *

 * QR Code specifications

 *

 * Based on libqrencode C library distributed under LGPL 2.1

 * Copyright (C) 2006, 2007, 2008, 2009 Kentaro Fukuchi <fukuchi@megaui.net>

 *

 * PHP QR Code is distributed under LGPL 3

 * Copyright (C) 2010 Dominik Dzienia <deltalab at poczta dot fm>

 *

 * The following data / specifications are taken from

 * "Two dimensional symbol -- QR-code -- Basic Specification" (JIS X0510:2004)

 *  or

 * "Automatic identification and data capture techniques -- 

 *  QR Code 2005 bar code symbology specification" (ISO/IEC 18004:2006)

 *

 * 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

 */

 

    define('QRSPEC_VERSION_MAX', 40);

    define('QRSPEC_WIDTH_MAX', 177);


    define('QRCAP_WIDTH', 0);

    define('QRCAP_WORDS', 1);

    define('QRCAP_REMINDER', 2);

    define('QRCAP_EC', 3);


    class QRspec {

    

        public static $capacity = array(

            array(0, 0, 0, array(0, 0, 0, 0)),

            array(21, 26, 0, array(7, 10, 13, 17)), // 1

            array(25, 44, 7, array(10, 16, 22, 28)),

            array(29, 70, 7, array(15, 26, 36, 44)),

            array(33, 100, 7, array(20, 36, 52, 64)),

            array(37, 134, 7, array(26, 48, 72, 88)), // 5

            array(41, 172, 7, array(36, 64, 96, 112)),

            array(45, 196, 0, array(40, 72, 108, 130)),

            array(49, 242, 0, array(48, 88, 132, 156)),

            array(53, 292, 0, array(60, 110, 160, 192)),

            array(57, 346, 0, array(72, 130, 192, 224)), //10

            array(61, 404, 0, array(80, 150, 224, 264)),

            array(65, 466, 0, array(96, 176, 260, 308)),

            array(69, 532, 0, array(104, 198, 288, 352)),

            array(73, 581, 3, array(120, 216, 320, 384)),

            array(77, 655, 3, array(132, 240, 360, 432)), //15

            array(81, 733, 3, array(144, 280, 408, 480)),

            array(85, 815, 3, array(168, 308, 448, 532)),

            array(89, 901, 3, array(180, 338, 504, 588)),

            array(93, 991, 3, array(196, 364, 546, 650)),

            array(97, 1085, 3, array(224, 416, 600, 700)), //20

            array(101, 1156, 4, array(224, 442, 644, 750)),

            array(105, 1258, 4, array(252, 476, 690, 816)),

            array(109, 1364, 4, array(270, 504, 750, 900)),

            array(113, 1474, 4, array(300, 560, 810, 960)),

            array(117, 1588, 4, array(312, 588, 870, 1050)), //25

            array(121, 1706, 4, array(336, 644, 952, 1110)),

            array(125, 1828, 4, array(360, 700, 1020, 1200)),

            array(129, 1921, 3, array(390, 728, 1050, 1260)),

            array(133, 2051, 3, array(420, 784, 1140, 1350)),

            array(137, 2185, 3, array(450, 812, 1200, 1440)), //30

            array(141, 2323, 3, array(480, 868, 1290, 1530)),

            array(145, 2465, 3, array(510, 924, 1350, 1620)),

            array(149, 2611, 3, array(540, 980, 1440, 1710)),

            array(153, 2761, 3, array(570, 1036, 1530, 1800)),

            array(157, 2876, 0, array(570, 1064, 1590, 1890)), //35

            array(161, 3034, 0, array(600, 1120, 1680, 1980)),

            array(165, 3196, 0, array(630, 1204, 1770, 2100)),

            array(169, 3362, 0, array(660, 1260, 1860, 2220)),

            array(173, 3532, 0, array(720, 1316, 1950, 2310)),

            array(177, 3706, 0, array(750, 1372, 2040, 2430)) //40

        );

        

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

        public static function getDataLength($version, $level)

        {

            return self::$capacity[$version][QRCAP_WORDS] - self::$capacity[$version][QRCAP_EC][$level];

        }

        

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

        public static function getECCLength($version, $level)

        {

            return self::$capacity[$version][QRCAP_EC][$level];

        }

        

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

        public static function getWidth($version)

        {

            return self::$capacity[$version][QRCAP_WIDTH];

        }

        

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

        public static function getRemainder($version)

        {

            return self::$capacity[$version][QRCAP_REMINDER];

        }

        

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

        public static function getMinimumVersion($size, $level)

        {


            for ($i = 1; $i <= QRSPEC_VERSION_MAX; $i++) {

                $words = self::$capacity[$i][QRCAP_WORDS] - self::$capacity[$i][QRCAP_EC][$level];

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


            return -1;

        }

    

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

        

        public static $lengthTableBits = array(

            array(10, 12, 14),

            array(9, 11, 13),

            array(8, 16, 16),

            array(8, 10, 12)

        );

        

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

        public static function lengthIndicator($mode, $version)

        {

            if ($mode == QR_MODE_STRUCTURE) {
                            return 0;
            }
                

            if ($version <= 9) {

                $l = 0;

            } else if ($version <= 26) {

                $l = 1;

            } else {

                $l = 2;

            }


            return self::$lengthTableBits[$mode][$l];

        }

        

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

        public static function maximumWords($mode, $version)

        {

            if ($mode == QR_MODE_STRUCTURE) {
                            return 3;
            }
                

            if ($version <= 9) {

                $l = 0;

            } else if ($version <= 26) {

                $l = 1;

            } else {

                $l = 2;

            }


            $bits = self::$lengthTableBits[$mode][$l];

            $words = (1 << $bits) - 1;

            

            if ($mode == QR_MODE_KANJI) {

                $words *= 2; // the number of bytes is required

            }


            return $words;

        }


        // Error correction code -----------------------------------------------

        // Table of the error correction code (Reed-Solomon block)

        // See Table 12-16 (pp.30-36), JIS X0510:2004.


        public static $eccTable = array(

            array(array(0, 0), array(0, 0), array(0, 0), array(0, 0)),

            array(array(1, 0), array(1, 0), array(1, 0), array(1, 0)), // 1

            array(array(1, 0), array(1, 0), array(1, 0), array(1, 0)),

            array(array(1, 0), array(1, 0), array(2, 0), array(2, 0)),

            array(array(1, 0), array(2, 0), array(2, 0), array(4, 0)),

            array(array(1, 0), array(2, 0), array(2, 2), array(2, 2)), // 5

            array(array(2, 0), array(4, 0), array(4, 0), array(4, 0)),

            array(array(2, 0), array(4, 0), array(2, 4), array(4, 1)),

            array(array(2, 0), array(2, 2), array(4, 2), array(4, 2)),

            array(array(2, 0), array(3, 2), array(4, 4), array(4, 4)),

            array(array(2, 2), array(4, 1), array(6, 2), array(6, 2)), //10

            array(array(4, 0), array(1, 4), array(4, 4), array(3, 8)),

            array(array(2, 2), array(6, 2), array(4, 6), array(7, 4)),

            array(array(4, 0), array(8, 1), array(8, 4), array(12, 4)),

            array(array(3, 1), array(4, 5), array(11, 5), array(11, 5)),

            array(array(5, 1), array(5, 5), array(5, 7), array(11, 7)), //15

            array(array(5, 1), array(7, 3), array(15, 2), array(3, 13)),

            array(array(1, 5), array(10, 1), array(1, 15), array(2, 17)),

            array(array(5, 1), array(9, 4), array(17, 1), array(2, 19)),

            array(array(3, 4), array(3, 11), array(17, 4), array(9, 16)),

            array(array(3, 5), array(3, 13), array(15, 5), array(15, 10)), //20

            array(array(4, 4), array(17, 0), array(17, 6), array(19, 6)),

            array(array(2, 7), array(17, 0), array(7, 16), array(34, 0)),

            array(array(4, 5), array(4, 14), array(11, 14), array(16, 14)),

            array(array(6, 4), array(6, 14), array(11, 16), array(30, 2)),

            array(array(8, 4), array(8, 13), array(7, 22), array(22, 13)), //25

            array(array(10, 2), array(19, 4), array(28, 6), array(33, 4)),

            array(array(8, 4), array(22, 3), array(8, 26), array(12, 28)),

            array(array(3, 10), array(3, 23), array(4, 31), array(11, 31)),

            array(array(7, 7), array(21, 7), array(1, 37), array(19, 26)),

            array(array(5, 10), array(19, 10), array(15, 25), array(23, 25)), //30

            array(array(13, 3), array(2, 29), array(42, 1), array(23, 28)),

            array(array(17, 0), array(10, 23), array(10, 35), array(19, 35)),

            array(array(17, 1), array(14, 21), array(29, 19), array(11, 46)),

            array(array(13, 6), array(14, 23), array(44, 7), array(59, 1)),

            array(array(12, 7), array(12, 26), array(39, 14), array(22, 41)), //35

            array(array(6, 14), array(6, 34), array(46, 10), array(2, 64)),

            array(array(17, 4), array(29, 14), array(49, 10), array(24, 46)),

            array(array(4, 18), array(13, 32), array(48, 14), array(42, 32)),

            array(array(20, 4), array(40, 7), array(43, 22), array(10, 67)),

            array(array(19, 6), array(18, 31), array(34, 34), array(20, 61)), //40

        );                                                                       


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

        // CACHEABLE!!!

        

        public static function getEccSpec($version, $level, array &$spec)

        {

            if (count($spec) < 5) {

                $spec = array(0, 0, 0, 0, 0);

            }


            $b1   = self::$eccTable[$version][$level][0];

            $b2   = self::$eccTable[$version][$level][1];

            $data = self::getDataLength($version, $level);

            $ecc  = self::getECCLength($version, $level);


            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;

            }

        }


        // Alignment pattern ---------------------------------------------------


        // 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.

         

        public static $alignmentPattern = array(      

            array(0, 0),

            array(0, 0), array(18, 0), array(22, 0), array(26, 0), array(30, 0), // 1- 5

            array(34, 0), array(22, 38), array(24, 42), array(26, 46), array(28, 50), // 6-10

            array(30, 54), array(32, 58), array(34, 62), array(26, 46), array(26, 48), //11-15

            array(26, 50), array(30, 54), array(30, 56), array(30, 58), array(34, 62), //16-20

            array(28, 50), array(26, 50), array(30, 54), array(28, 54), array(32, 58), //21-25

            array(30, 58), array(34, 62), array(26, 50), array(30, 54), array(26, 52), //26-30

            array(30, 56), array(34, 60), array(30, 58), array(34, 62), array(30, 54), //31-35

            array(24, 50), array(28, 54), array(32, 58), array(26, 54), array(30, 58), //35-40

        );                                                                                  


        

        /** --------------------------------------------------------------------

         * Put an alignment marker.

         * @param frame

         * @param width

         * @param ox,oy center coordinate of the pattern

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

         */

        public static function putAlignmentMarker(array &$frame, $ox, $oy)

        {

            $finder = array(

                "\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++) {

                QRstr::set($frame, $xStart, $yStart + $y, $finder[$y]);

            }

        }


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

        public static function putAlignmentPattern($version, &$frame, $width)

        {

            if ($version < 2) {
                            return;
            }

            $d = self::$alignmentPattern[$version][1] - self::$alignmentPattern[$version][0];

            if ($d < 0) {

                $w = 2;

            } else {

                $w = (int) (($width - self::$alignmentPattern[$version][0]) / $d + 2);

            }


            if ($w * $w - 3 == 1) {

                $x = self::$alignmentPattern[$version][0];

                $y = self::$alignmentPattern[$version][0];

                self::putAlignmentMarker($frame, $x, $y);

                return;

            }


            $cx = self::$alignmentPattern[$version][0];

            for ($x = 1; $x < $w - 1; $x++) {

                self::putAlignmentMarker($frame, 6, $cx);

                self::putAlignmentMarker($frame, $cx, 6);

                $cx += $d;

            }


            $cy = self::$alignmentPattern[$version][0];

            for ($y = 0; $y < $w - 1; $y++) {

                $cx = self::$alignmentPattern[$version][0];

                for ($x = 0; $x < $w - 1; $x++) {

                    self::putAlignmentMarker($frame, $cx, $cy);

                    $cx += $d;

                }

                $cy += $d;

            }

        }


        // Version information pattern -----------------------------------------


        // Version information pattern (BCH coded).

        // See Table 1 in Appendix D (pp.68) of JIS X0510:2004.

        

        // size: [QRSPEC_VERSION_MAX - 6]

		

        public static $versionPattern = array(

            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

        );


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

        public static function getVersionPattern($version)

        {

            if ($version < 7 || $version > QRSPEC_VERSION_MAX) {
                            return 0;
            }

            return self::$versionPattern[$version - 7];

        }


        // Format information --------------------------------------------------

        // See calcFormatInfo in tests/test_qrspec.c (orginal qrencode c lib)

        

        public static $formatInfo = array(

            array(0x77c4, 0x72f3, 0x7daa, 0x789d, 0x662f, 0x6318, 0x6c41, 0x6976),

            array(0x5412, 0x5125, 0x5e7c, 0x5b4b, 0x45f9, 0x40ce, 0x4f97, 0x4aa0),

            array(0x355f, 0x3068, 0x3f31, 0x3a06, 0x24b4, 0x2183, 0x2eda, 0x2bed),

            array(0x1689, 0x13be, 0x1ce7, 0x19d0, 0x0762, 0x0255, 0x0d0c, 0x083b)

        );


        public static function getFormatInfo($mask, $level)

        {

            if ($mask < 0 || $mask > 7) {
                            return 0;
            }
                

            if ($level < 0 || $level > 3) {
                            return 0;
            }

            return self::$formatInfo[$level][$mask];

        }


        // Frame ---------------------------------------------------------------

        // Cache of initial frames.

         

        public static $frames = array();


        /** --------------------------------------------------------------------

         * Put a finder pattern.

         * @param frame

         * @param width

         * @param ox,oy upper-left coordinate of the pattern

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

         */

        public static function putFinderPattern(&$frame, $ox, $oy)

        {

            $finder = array(

                "\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++) {

                QRstr::set($frame, $ox, $oy + $y, $finder[$y]);

            }

        }


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

        public static function createFrame($version)

        {

            $width = self::$capacity[$version][QRCAP_WIDTH];

            $frameLine = str_repeat("\0", $width);

            $frame = array_fill(0, $width, $frameLine);


            // Finder pattern

            self::putFinderPattern($frame, 0, 0);

            self::putFinderPattern($frame, $width - 7, 0);

            self::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);

            

            QRstr::set($frame, 0, 7, $setPattern);

            QRstr::set($frame, $width - 8, 7, $setPattern);

            QRstr::set($frame, 0, $width - 8, $setPattern);

        

            // Format info

            $setPattern = str_repeat("\x84", 9);

            QRstr::set($frame, 0, 8, $setPattern);

            QRstr::set($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  

            

            for ($i = 1; $i < $width - 15; $i++) {

                $frame[6][7 + $i] = chr(0x90 | ($i & 1));

                $frame[7 + $i][6] = chr(0x90 | ($i & 1));

            }

            

            // Alignment pattern  

            self::putAlignmentPattern($version, $frame, $width);

            

            // Version information 

            if ($version >= 7) {

                $vinf = self::getVersionPattern($version);


                $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;

        }


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

        public static function debug($frame, $binary_mode = false)

        {

            if ($binary_mode) {

            

                    foreach ($frame as &$frameLine) {

                        $frameLine = join('<span class="m">&nbsp;&nbsp;</span>', explode('0', $frameLine));

                        $frameLine = join('&#9608;&#9608;', explode('1', $frameLine));

                    }

                    

                    ?>

                <style>

                    .m { background-color: white; }

                </style>

                <?php

                    echo '<pre><tt><br/ ><br/ ><br/ >&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;';

                    echo join("<br/ >&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;", $frame);

                    echo '</tt></pre><br/ ><br/ ><br/ ><br/ ><br/ ><br/ >';

            

            } else {

            

                foreach ($frame as &$frameLine) {

                    $frameLine = join('<span class="m">&nbsp;</span>', explode("\xc0", $frameLine));

                    $frameLine = join('<span class="m">&#9618;</span>', explode("\xc1", $frameLine));

                    $frameLine = join('<span class="p">&nbsp;</span>', explode("\xa0", $frameLine));

                    $frameLine = join('<span class="p">&#9618;</span>', explode("\xa1", $frameLine));

                    $frameLine = join('<span class="s">&#9671;</span>', explode("\x84", $frameLine)); //format 0

                    $frameLine = join('<span class="s">&#9670;</span>', explode("\x85", $frameLine)); //format 1

                    $frameLine = join('<span class="x">&#9762;</span>', explode("\x81", $frameLine)); //special bit

                    $frameLine = join('<span class="c">&nbsp;</span>', explode("\x90", $frameLine)); //clock 0

                    $frameLine = join('<span class="c">&#9719;</span>', explode("\x91", $frameLine)); //clock 1

                    $frameLine = join('<span class="f">&nbsp;</span>', explode("\x88", $frameLine)); //version

                    $frameLine = join('<span class="f">&#9618;</span>', explode("\x89", $frameLine)); //version

                    $frameLine = join('&#9830;', explode("\x01", $frameLine));

                    $frameLine = join('&#8901;', explode("\0", $frameLine));

                }

                

                ?>

                <style>

                    .p { background-color: yellow; }

                    .m { background-color: #00FF00; }

                    .s { background-color: #FF0000; }

                    .c { background-color: aqua; }

                    .x { background-color: pink; }

                    .f { background-color: gold; }

                </style>

                <?php

                echo "<pre><tt>";

                echo join("<br/ >", $frame);

                echo "</tt></pre>";

            

            }

        }


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

        public static function serial($frame)

        {

            return gzcompress(join("\n", $frame), 9);

        }

        

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

        public static function unserial($code)

        {

            return explode("\n", gzuncompress($code));

        }

        

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

        public static function newFrame($version)

        {

            if ($version < 1 || $version > QRSPEC_VERSION_MAX) {
                            return null;
            }

            if (!isset(self::$frames[$version])) {

                

                $fileName = QR_CACHE_DIR.'frame_'.$version.'.dat';

                

                if (QR_CACHEABLE) {

                    if (file_exists($fileName)) {

                        self::$frames[$version] = self::unserial(file_get_contents($fileName));

                    } else {

                        self::$frames[$version] = self::createFrame($version);

                        file_put_contents($fileName, self::serial(self::$frames[$version]));

                    }

                } else {

                    self::$frames[$version] = self::createFrame($version);

                }

            }

            

            if (is_null(self::$frames[$version])) {
                            return null;
            }

            return self::$frames[$version];

        }


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

        public static function rsBlockNum($spec) { return $spec[0] + $spec[3]; }

        public static function rsBlockNum1($spec) { return $spec[0]; }

        public static function rsDataCodes1($spec) { return $spec[1]; }

        public static function rsEccCodes1($spec) { return $spec[2]; }

        public static function rsBlockNum2($spec) { return $spec[3]; }

        public static function rsDataCodes2($spec) { return $spec[4]; }

        public static function rsEccCodes2($spec) { return $spec[2]; }

        public static function rsDataLength($spec) { return ($spec[0] * $spec[1]) + ($spec[3] * $spec[4]); }

        public static function rsEccLength($spec) { return ($spec[0] + $spec[3]) * $spec[2]; }

        

    }



//---- qrimage.php -----------------------------




/*

 * PHP QR Code encoder

 *

 * Image output of code using GD2

 *

 * PHP QR Code is distributed under LGPL 3

 * Copyright (C) 2010 Dominik Dzienia <deltalab at poczta dot fm>

 *

 * 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

 */

 

    define('QR_IMAGE', true);


    class QRimage {

    

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

        public static function png($frame, $filename = false, $pixelPerPoint = 4, $outerFrame = 4, $saveandprint = false) 

        {

            $image = self::image($frame, $pixelPerPoint, $outerFrame);

            

            if ($filename === false) {

                Header("Content-type: image/png");

                ImagePng($image);

It seems like $image can also be of type false; however, parameter $image of imagepng() does only seem to accept resource, maybe add an additional type check?

            } else {

                if ($saveandprint === true) {

                    ImagePng($image, $filename);

                    header("Content-type: image/png");

                    ImagePng($image);

                } else {

                    ImagePng($image, $filename);

                }

            }

            

            ImageDestroy($image);

It seems like $image can also be of type false; however, parameter $image of imagedestroy() does only seem to accept resource, maybe add an additional type check?

        }

    

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

        public static function jpg($frame, $filename = false, $pixelPerPoint = 8, $outerFrame = 4, $q = 85) 

        {

            $image = self::image($frame, $pixelPerPoint, $outerFrame);

            

            if ($filename === false) {

                Header("Content-type: image/jpeg");

                ImageJpeg($image, null, $q);

It seems like $image can also be of type false; however, parameter $image of imagejpeg() does only seem to accept resource, maybe add an additional type check?

            } else {

                ImageJpeg($image, $filename, $q);            

            }

            

            ImageDestroy($image);

It seems like $image can also be of type false; however, parameter $image of imagedestroy() does only seem to accept resource, maybe add an additional type check?

        }

    

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

        private static function image($frame, $pixelPerPoint = 4, $outerFrame = 4) 

        {

            $h = count($frame);

            $w = strlen($frame[0]);

            

            $imgW = $w + 2 * $outerFrame;

            $imgH = $h + 2 * $outerFrame;

            

            $base_image = ImageCreate($imgW, $imgH);

            

            $col[0] = ImageColorAllocate($base_image, 255, 255, 255);

$col was never initialized. Although not strictly required by PHP, it is generally a good practice to add $col = array(); before regardless.

It seems like $base_image can also be of type false; however, parameter $image of imagecolorallocate() does only seem to accept resource, maybe add an additional type check?

            $col[1] = ImageColorAllocate($base_image, 0, 0, 0);


            imagefill($base_image, 0, 0, $col[0]);

It seems like $base_image can also be of type false; however, parameter $image of imagefill() does only seem to accept resource, maybe add an additional type check?

            for ($y = 0; $y < $h; $y++) {

                for ($x = 0; $x < $w; $x++) {

                    if ($frame[$y][$x] == '1') {

                        ImageSetPixel($base_image, $x + $outerFrame, $y + $outerFrame, $col[1]); 

It seems like $base_image can also be of type false; however, parameter $image of imagesetpixel() does only seem to accept resource, maybe add an additional type check?

                    }

                }

            }

            

            $target_image = ImageCreate($imgW * $pixelPerPoint, $imgH * $pixelPerPoint);

            ImageCopyResized($target_image, $base_image, 0, 0, 0, 0, $imgW * $pixelPerPoint, $imgH * $pixelPerPoint, $imgW, $imgH);

It seems like $base_image can also be of type false; however, parameter $src_image of imagecopyresized() does only seem to accept resource, maybe add an additional type check?

It seems like $target_image can also be of type false; however, parameter $dst_image of imagecopyresized() does only seem to accept resource, maybe add an additional type check?

            ImageDestroy($base_image);

It seems like $base_image can also be of type false; however, parameter $image of imagedestroy() does only seem to accept resource, maybe add an additional type check?

            

            return $target_image;

        }

    }



//---- qrinput.php -----------------------------




/*

 * PHP QR Code encoder

 *

 * Input encoding class

 *

 * Based on libqrencode C library distributed under LGPL 2.1

 * Copyright (C) 2006, 2007, 2008, 2009 Kentaro Fukuchi <fukuchi@megaui.net>

 *

 * PHP QR Code is distributed under LGPL 3

 * Copyright (C) 2010 Dominik Dzienia <deltalab at poczta dot fm>

 *

 * 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

 */

 

    define('STRUCTURE_HEADER_BITS', 20);

    define('MAX_STRUCTURED_SYMBOLS', 16);


    class QRinputItem {

    

        public $mode;

        public $size;

        public $data;

        public $bstream;


        public function __construct($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 (!QRinput::check($mode, $size, $setData)) {

                throw new Exception('Error m:'.$mode.',s:'.$size.',d:'.join(',', $setData));

                return null;

return null is not reachable.

            }

            

            $this->mode = $mode;

            $this->size = $size;

            $this->data = $setData;

            $this->bstream = $bstream;

        }

        

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

        public function encodeModeNum($version)

        {

            try {

            

                $words = (int) ($this->size / 3);

                $bs = new QRbitstream();

                

                $val = 0x1;

                $bs->appendNum(4, $val);

                $bs->appendNum(QRspec::lengthIndicator(QR_MODE_NUM, $version), $this->size);


                for ($i = 0; $i < $words; $i++) {

                    $val  = (ord($this->data[$i * 3]) - ord('0')) * 100;

                    $val += (ord($this->data[$i * 3 + 1]) - ord('0')) * 10;

                    $val += (ord($this->data[$i * 3 + 2]) - ord('0'));

                    $bs->appendNum(10, $val);

                }


                if ($this->size - $words * 3 == 1) {

                    $val = ord($this->data[$words * 3]) - ord('0');

                    $bs->appendNum(4, $val);

                } else if ($this->size - $words * 3 == 2) {

                    $val  = (ord($this->data[$words * 3]) - ord('0')) * 10;

                    $val += (ord($this->data[$words * 3 + 1]) - ord('0'));

                    $bs->appendNum(7, $val);

                }


                $this->bstream = $bs;

                return 0;

                

            } catch (Exception $e) {

                return -1;

            }

        }

        

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

        public function encodeModeAn($version)

        {

            try {

                $words = (int) ($this->size / 2);

                $bs = new QRbitstream();

                

                $bs->appendNum(4, 0x02);

                $bs->appendNum(QRspec::lengthIndicator(QR_MODE_AN, $version), $this->size);


                for ($i = 0; $i < $words; $i++) {

                    $val  = (int) QRinput::lookAnTable(ord($this->data[$i * 2])) * 45;

                    $val += (int) QRinput::lookAnTable(ord($this->data[$i * 2 + 1]));


                    $bs->appendNum(11, $val);

                }


                if ($this->size & 1) {

                    $val = QRinput::lookAnTable(ord($this->data[$words * 2]));

                    $bs->appendNum(6, $val);

                }

        

                $this->bstream = $bs;

                return 0;

            

            } catch (Exception $e) {

                return -1;

            }

        }

        

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

        public function encodeMode8($version)

        {

            try {

                $bs = new QRbitstream();


                $bs->appendNum(4, 0x4);

                $bs->appendNum(QRspec::lengthIndicator(QR_MODE_8, $version), $this->size);


                for ($i = 0; $i < $this->size; $i++) {

                    $bs->appendNum(8, ord($this->data[$i]));

                }


                $this->bstream = $bs;

                return 0;

            

            } catch (Exception $e) {

                return -1;

            }

        }

        

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

        public function encodeModeKanji($version)

        {

            try {


                $bs = new QRbitrtream();

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

                

                $bs->appendNum(4, 0x8);

                $bs->appendNum(QRspec::lengthIndicator(QR_MODE_KANJI, $version), (int) ($this->size / 2));


                for ($i = 0; $i < $this->size; $i += 2) {

                    $val = (ord($this->data[$i]) << 8) | ord($this->data[$i + 1]);

                    if ($val <= 0x9ffc) {

                        $val -= 0x8140;

                    } else {

                        $val -= 0xc140;

                    }

                    

                    $h = ($val >> 8) * 0xc0;

                    $val = ($val & 0xff) + $h;


                    $bs->appendNum(13, $val);

                }


                $this->bstream = $bs;

                return 0;

            

            } catch (Exception $e) {

                return -1;

            }

        }


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

        public function encodeModeStructure()

        {

            try {

                $bs = new QRbitstream();

                

                $bs->appendNum(4, 0x03);

                $bs->appendNum(4, ord($this->data[1]) - 1);

                $bs->appendNum(4, ord($this->data[0]) - 1);

                $bs->appendNum(8, ord($this->data[2]));


                $this->bstream = $bs;

                return 0;

            

            } catch (Exception $e) {

                return -1;

            }

        }

        

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

        public function estimateBitStreamSizeOfEntry($version)

        {

            $bits = 0;


            if ($version == 0) {
                            $version = 1;
            }

            switch ($this->mode) {

            case QR_MODE_NUM:        $bits = QRinput::estimateBitsModeNum($this->size); break;

            case QR_MODE_AN:        $bits = QRinput::estimateBitsModeAn($this->size); break;

            case QR_MODE_8:            $bits = QRinput::estimateBitsMode8($this->size); break;

            case QR_MODE_KANJI:        $bits = QRinput::estimateBitsModeKanji($this->size); break;

The method QRinput::estimateBitsModeKanji() is not static, but was called statically.

            case QR_MODE_STRUCTURE:    return STRUCTURE_HEADER_BITS;            

            default:

                return 0;

            }


            $l = QRspec::lengthIndicator($this->mode, $version);

            $m = 1 << $l;

            $num = (int) (($this->size + $m - 1) / $m);


            $bits += $num * (4 + $l);


            return $bits;

        }

        

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

        public function encodeBitStream($version)

        {

            try {

            

                unset($this->bstream);

                $words = QRspec::maximumWords($this->mode, $version);

                

                if ($this->size > $words) {

                

                    $st1 = new QRinputItem($this->mode, $words, $this->data);

                    $st2 = new QRinputItem($this->mode, $this->size - $words, array_slice($this->data, $words));


                    $st1->encodeBitStream($version);

                    $st2->encodeBitStream($version);

                    

                    $this->bstream = new QRbitstream();

                    $this->bstream->append($st1->bstream);

                    $this->bstream->append($st2->bstream);

                    

                    unset($st1);

                    unset($st2);

                    

                } else {

                    

                    $ret = 0;

                    

                    switch ($this->mode) {

                    case QR_MODE_NUM:        $ret = $this->encodeModeNum($version); break;

                    case QR_MODE_AN:        $ret = $this->encodeModeAn($version); break;

                    case QR_MODE_8:            $ret = $this->encodeMode8($version); break;

                    case QR_MODE_KANJI:        $ret = $this->encodeModeKanji($version); break;

                    case QR_MODE_STRUCTURE:    $ret = $this->encodeModeStructure(); break;

                        

                    default:

                        break;

                    }

                    

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


                return $this->bstream->size();

            

            } catch (Exception $e) {

                return -1;

            }

        }

    };

    

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


    class QRinput {


        public $items;

        

        private $version;

        private $level;

        

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

        public function __construct($version = 0, $level = QR_ECLEVEL_L)

        {

            if ($version < 0 || $version > QRSPEC_VERSION_MAX || $level > QR_ECLEVEL_H) {

                throw new Exception('Invalid version no');

                return null;

return null is not reachable.

            }

            

            $this->version = $version;

            $this->level = $level;

        }

        

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

        public function getVersion()

        {

            return $this->version;

        }

        

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

        public function setVersion($version)

        {

            if ($version < 0 || $version > QRSPEC_VERSION_MAX) {

                throw new Exception('Invalid version no');

                return -1;

return -1 is not reachable.

            }


            $this->version = $version;


            return 0;

        }

        

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

        public function getErrorCorrectionLevel()

        {

            return $this->level;

        }


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

        public function setErrorCorrectionLevel($level)

        {

            if ($level > QR_ECLEVEL_H) {

                throw new Exception('Invalid ECLEVEL');

                return -1;

return -1 is not reachable.

            }


            $this->level = $level;


            return 0;

        }

        

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

        public function appendEntry(QRinputItem $entry)

        {

            $this->items[] = $entry;

        }

        

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

        public function append($mode, $size, $data)

        {

            try {

                $entry = new QRinputItem($mode, $size, $data);

                $this->items[] = $entry;

                return 0;

            } catch (Exception $e) {

                return -1;

            }

        }

        

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

        

        public function insertStructuredAppendHeader($size, $index, $parity)

        {

            if ($size > MAX_STRUCTURED_SYMBOLS) {

                throw new Exception('insertStructuredAppendHeader wrong size');

            }

            

            if ($index <= 0 || $index > MAX_STRUCTURED_SYMBOLS) {

                throw new Exception('insertStructuredAppendHeader wrong index');

            }


            $buf = array($size, $index, $parity);

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

            

            try {

                $entry = new QRinputItem(QR_MODE_STRUCTURE, 3, buf);

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

                array_unshift($this->items, $entry);

                return 0;

            } catch (Exception $e) {

                return -1;

            }

        }


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

        public function calcParity()

        {

            $parity = 0;

            

            foreach ($this->items as $item) {

                if ($item->mode != QR_MODE_STRUCTURE) {

                    for ($i = $item->size - 1; $i >= 0; $i--) {

                        $parity ^= $item->data[$i];

                    }

                }

            }


            return $parity;

        }

        

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

        public static function checkModeNum($size, $data)

        {

            for ($i = 0; $i < $size; $i++) {

                if ((ord($data[$i]) < ord('0')) || (ord($data[$i]) > ord('9'))) {

                    return false;

                }

            }


            return true;

        }


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

        public static 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;

        }

        

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

        public static $anTable = array(

            -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

        );

        

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

        public static function lookAnTable($c)

        {

            return (($c > 127) ?-1 : self::$anTable[$c]);

        }

        

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

        public static function checkModeAn($size, $data)

        {

            for ($i = 0; $i < $size; $i++) {

                if (self::lookAnTable(ord($data[$i])) == -1) {

                    return false;

                }

            }


            return true;

        }

        

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

        public static function estimateBitsModeAn($size)

        {

            $w = (int) ($size / 2);

            $bits = $w * 11;

            

            if ($size & 1) {

                $bits += 6;

            }


            return $bits;

        }

    

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

        public static function estimateBitsMode8($size)

        {

            return $size * 8;

        }

        

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

        public function estimateBitsModeKanji($size)

        {

            return (int) (($size / 2) * 13);

        }

        

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

        public static 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 

                || ($val > 0x9ffc && $val < 0xe040) 

                || $val > 0xebbf) {

                    return false;

                }

            }


            return true;

        }


        /***********************************************************************

         * Validation

         **********************************************************************/


        public static function check($mode, $size, $data)

        {

            if ($size <= 0) {
                            return false;
            }

            switch ($mode) {

            case QR_MODE_NUM:       return self::checkModeNum($size, $data); break;

break is not strictly necessary here and could be removed.

            case QR_MODE_AN:        return self::checkModeAn($size, $data); break;

            case QR_MODE_KANJI:     return self::checkModeKanji($size, $data); break;

            case QR_MODE_8:         return true; break;

            case QR_MODE_STRUCTURE: return true; break;

                

            default:

                break;

            }


            return false;

        }

        

        

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

        public function estimateBitStreamSize($version)

        {

            $bits = 0;


            foreach ($this->items as $item) {

                $bits += $item->estimateBitStreamSizeOfEntry($version);

            }


            return $bits;

        }

        

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

        public function estimateVersion()

        {

            $version = 0;

            $prev = 0;

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

            do {

                $prev = $version;

                $bits = $this->estimateBitStreamSize($prev);

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

                if ($version < 0) {

                    return -1;

                }

            } while ($version > $prev);


            return $version;

        }

        

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

        public static function lengthOfCode($mode, $version, $bits)

        {

            $payload = $bits - 4 - QRspec::lengthIndicator($mode, $version);

            switch ($mode) {

            case QR_MODE_NUM:

                $chunks = (int) ($payload / 10);

                $remain = $payload - $chunks * 10;

                $size = $chunks * 3;

                if ($remain >= 7) {

                    $size += 2;

                } else if ($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_8:

                $size = (int) ($payload / 8);

                break;

            case QR_MODE_KANJI:

                $size = (int) (($payload / 13) * 2);

                break;

            case QR_MODE_STRUCTURE:

                $size = (int) ($payload / 8);

                break;

            default:

                $size = 0;

                break;

            }

            

            $maxsize = QRspec::maximumWords($mode, $version);

            if ($size < 0) {
                $size = 0;
            }
            if ($size > $maxsize) {
                $size = $maxsize;
            }

            return $size;

        }

        

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

        public function createBitStream()

        {

            $total = 0;


            foreach ($this->items as $item) {

                $bits = $item->encodeBitStream($this->version);

                

                if ($bits < 0) {
                                    return -1;
                }
                    

                $total += $bits;

            }


            return $total;

        }

        

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

        public function convertData()

        {

            $ver = $this->estimateVersion();

            if ($ver > $this->getVersion()) {

                $this->setVersion($ver);

            }


            for (;;) {

                $bits = $this->createBitStream();

                

                if ($bits < 0) {
                                    return -1;
                }
                    

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

                if ($ver < 0) {

                    throw new Exception('WRONG VERSION');

                    return -1;

return -1 is not reachable.

                } else if ($ver > $this->getVersion()) {

                    $this->setVersion($ver);

                } else {

                    break;

                }

            }


            return 0;

        }

        

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

        public function appendPaddingBit(&$bstream)

        {

            $bits = $bstream->size();

            $maxwords = QRspec::getDataLength($this->version, $this->level);

            $maxbits = $maxwords * 8;


            if ($maxbits == $bits) {

                return 0;

            }


            if ($maxbits - $bits < 5) {

                return $bstream->appendNum($maxbits - $bits, 0);

            }


            $bits += 4;

            $words = (int) (($bits + 7) / 8);


            $padding = new QRbitstream();

            $ret = $padding->appendNum($words * 8 - $bits + 4, 0);

            

            if ($ret < 0) {
                            return $ret;
            }

            $padlen = $maxwords - $words;

            

            if ($padlen > 0) {

                

                $padbuf = array();

                for ($i = 0; $i < $padlen; $i++) {

                    $padbuf[$i] = ($i & 1) ? 0x11 : 0xec;

                }

                

                $ret = $padding->appendBytes($padlen, $padbuf);

                

                if ($ret < 0) {
                                    return $ret;
                }
                

            }


            $ret = $bstream->append($padding);

            

            return $ret;

        }


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

        public function mergeBitStream()

        {

            if ($this->convertData() < 0) {

                return null;

            }


            $bstream = new QRbitstream();

            

            foreach ($this->items as $item) {

                $ret = $bstream->append($item->bstream);

                if ($ret < 0) {

                    return null;

                }

            }


            return $bstream;

        }


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

        public function getBitStream()

        {


            $bstream = $this->mergeBitStream();

            

            if ($bstream == null) {

                return null;

            }

            

            $ret = $this->appendPaddingBit($bstream);

            if ($ret < 0) {

                return null;

            }


            return $bstream;

        }

        

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

        public function getByteStream()

        {

            $bstream = $this->getBitStream();

Are you sure the assignment to $bstream is correct as $this->getBitStream() targeting QRinput::getBitStream() seems to always return null.

            if ($bstream == null) {

The condition $bstream == null is always true.

                return null;

            }

            

            return $bstream->toByte();

        }

    }

        

        

    



//---- qrbitstream.php -----------------------------




/*

 * PHP QR Code encoder

 *

 * Bitstream class

 *

 * Based on libqrencode C library distributed under LGPL 2.1

 * Copyright (C) 2006, 2007, 2008, 2009 Kentaro Fukuchi <fukuchi@megaui.net>

 *

 * PHP QR Code is distributed under LGPL 3

 * Copyright (C) 2010 Dominik Dzienia <deltalab at poczta dot fm>

 *

 * 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

 */

     

    class QRbitstream {

    

        public $data = array();

        

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

        public function size()

        {

            return count($this->data);

        }

        

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

        public function allocate($setLength)

        {

            $this->data = array_fill(0, $setLength, 0);

            return 0;

        }

    

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

        public static function newFromNum($bits, $num)

        {

            $bstream = new QRbitstream();

            $bstream->allocate($bits);

            

            $mask = 1 << ($bits - 1);

            for ($i = 0; $i < $bits; $i++) {

                if ($num & $mask) {

                    $bstream->data[$i] = 1;

                } else {

                    $bstream->data[$i] = 0;

                }

                $mask = $mask >> 1;

            }


            return $bstream;

        }

        

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

        public static function newFromBytes($size, $data)

        {

            $bstream = new QRbitstream();

            $bstream->allocate($size * 8);

            $p = 0;


            for ($i = 0; $i < $size; $i++) {

                $mask = 0x80;

                for ($j = 0; $j < 8; $j++) {

                    if ($data[$i] & $mask) {

                        $bstream->data[$p] = 1;

                    } else {

                        $bstream->data[$p] = 0;

                    }

                    $p++;

                    $mask = $mask >> 1;

                }

            }


            return $bstream;

        }

        

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

        public function append(QRbitstream $arg)

        {

            if (is_null($arg)) {

                return -1;

            }

            

            if ($arg->size() == 0) {

                return 0;

            }

            

            if ($this->size() == 0) {

                $this->data = $arg->data;

                return 0;

            }

            

            $this->data = array_values(array_merge($this->data, $arg->data));


            return 0;

        }

        

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

        public function appendNum($bits, $num)

        {

            if ($bits == 0) {
                            return 0;
            }

            $b = QRbitstream::newFromNum($bits, $num);

            

            if (is_null($b)) {
                            return -1;
            }

            $ret = $this->append($b);

            unset($b);


            return $ret;

        }


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

        public function appendBytes($size, $data)

        {

            if ($size == 0) {
                            return 0;
            }

            $b = QRbitstream::newFromBytes($size, $data);

            

            if (is_null($b)) {
                            return -1;
            }

            $ret = $this->append($b);

            unset($b);


            return $ret;

        }

        

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

        public function toByte()

        {

        

            $size = $this->size();


            if ($size == 0) {

                return array();

            }

            

            $data = array_fill(0, (int) (($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 |= $this->data[$p];

                    $p++;

                }

                $data[$i] = $v;

            }

            

            if ($size & 7) {

                $v = 0;

                for ($j = 0; $j < ($size & 7); $j++) {

                    $v = $v << 1;

                    $v |= $this->data[$p];

                    $p++;

                }

                $data[$bytes] = $v;

            }


            return $data;

        }


    }





//---- qrsplit.php -----------------------------




/*

 * PHP QR Code encoder

 *

 * Input splitting classes

 *

 * Based on libqrencode C library distributed under LGPL 2.1

 * Copyright (C) 2006, 2007, 2008, 2009 Kentaro Fukuchi <fukuchi@megaui.net>

 *

 * PHP QR Code is distributed under LGPL 3

 * Copyright (C) 2010 Dominik Dzienia <deltalab at poczta dot fm>

 *

 * The following data / specifications are taken from

 * "Two dimensional symbol -- QR-code -- Basic Specification" (JIS X0510:2004)

 *  or

 * "Automatic identification and data capture techniques -- 

 *  QR Code 2005 bar code symbology specification" (ISO/IEC 18004:2006)

 *

 * 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

 */

    class QRsplit {


        public $dataStr = '';

        public $input;

        public $modeHint;


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

        public function __construct($dataStr, $input, $modeHint) 

        {

            $this->dataStr  = $dataStr;

            $this->input    = $input;

            $this->modeHint = $modeHint;

        }

        

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

        public static function isdigitat($str, $pos)

        {    

            if ($pos >= strlen($str)) {
                            return false;
            }
            

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

        }

        

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

        public static function isalnumat($str, $pos)

        {

            if ($pos >= strlen($str)) {
                            return false;
            }
                

            return (QRinput::lookAnTable(ord($str[$pos])) >= 0);

        }


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

        public function identifyMode($pos)

        {

            if ($pos >= strlen($this->dataStr)) {
                            return QR_MODE_NUL;
            }
                

            $c = $this->dataStr[$pos];

            

            if (self::isdigitat($this->dataStr, $pos)) {

                return QR_MODE_NUM;

            } else if (self::isalnumat($this->dataStr, $pos)) {

                return QR_MODE_AN;

            } else if ($this->modeHint == QR_MODE_KANJI) {

            

                if ($pos + 1 < strlen($this->dataStr)) 

                {

                    $d = $this->dataStr[$pos + 1];

                    $word = (ord($c) << 8) | ord($d);

                    if (($word >= 0x8140 && $word <= 0x9ffc) || ($word >= 0xe040 && $word <= 0xebbf)) {

                        return QR_MODE_KANJI;

                    }

                }

            }


            return QR_MODE_8;

        } 

        

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

        public function eatNum()

        {

            $ln = QRspec::lengthIndicator(QR_MODE_NUM, $this->input->getVersion());


            $p = 0;

            while (self::isdigitat($this->dataStr, $p)) {

                $p++;

            }

            

            $run = $p;

            $mode = $this->identifyMode($p);

            

            if ($mode == QR_MODE_8) {

                $dif = QRinput::estimateBitsModeNum($run) + 4 + $ln

                     + QRinput::estimateBitsMode8(1)         // + 4 + l8

                     - QRinput::estimateBitsMode8($run + 1); // - 4 - l8

                if ($dif > 0) {

                    return $this->eat8();

                }

            }

            if ($mode == QR_MODE_AN) {

                $dif = QRinput::estimateBitsModeNum($run) + 4 + $ln

                     + QRinput::estimateBitsModeAn(1)        // + 4 + la

                     - QRinput::estimateBitsModeAn($run + 1); // - 4 - la

                if ($dif > 0) {

                    return $this->eatAn();

                }

            }

            

            $ret = $this->input->append(QR_MODE_NUM, $run, str_split($this->dataStr));

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

            return $run;

        }

        

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

        public function eatAn()

        {

            $la = QRspec::lengthIndicator(QR_MODE_AN, $this->input->getVersion());

            $ln = QRspec::lengthIndicator(QR_MODE_NUM, $this->input->getVersion());


            $p = 0;

            

            while (self::isalnumat($this->dataStr, $p)) {

                if (self::isdigitat($this->dataStr, $p)) {

                    $q = $p;

                    while (self::isdigitat($this->dataStr, $q)) {

                        $q++;

                    }

                    

                    $dif = QRinput::estimateBitsModeAn($p) // + 4 + la

                         + QRinput::estimateBitsModeNum($q - $p) + 4 + $ln

                         - QRinput::estimateBitsModeAn($q); // - 4 - la

                         

                    if ($dif < 0) {

                        break;

                    } else {

                        $p = $q;

                    }

                } else {

                    $p++;

                }

            }


            $run = $p;


            if (!self::isalnumat($this->dataStr, $p)) {

                $dif = QRinput::estimateBitsModeAn($run) + 4 + $la

                     + QRinput::estimateBitsMode8(1) // + 4 + l8

                      - QRinput::estimateBitsMode8($run + 1); // - 4 - l8

                if ($dif > 0) {

                    return $this->eat8();

                }

            }


            $ret = $this->input->append(QR_MODE_AN, $run, str_split($this->dataStr));

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

            return $run;

        }

        

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

        public function eatKanji()

        {

            $p = 0;

            

            while ($this->identifyMode($p) == QR_MODE_KANJI) {

                $p += 2;

            }

            

            $ret = $this->input->append(QR_MODE_KANJI, $p, str_split($this->dataStr));

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

            return $run;

The variable $run seems to be never defined.

        }


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

        public function eat8()

        {

            $la = QRspec::lengthIndicator(QR_MODE_AN, $this->input->getVersion());

            $ln = QRspec::lengthIndicator(QR_MODE_NUM, $this->input->getVersion());


            $p = 1;

            $dataStrLen = strlen($this->dataStr);

            

            while ($p < $dataStrLen) {

                

                $mode = $this->identifyMode($p);

                if ($mode == QR_MODE_KANJI) {

                    break;

                }

                if ($mode == QR_MODE_NUM) {

                    $q = $p;

                    while (self::isdigitat($this->dataStr, $q)) {

                        $q++;

                    }

                    $dif = QRinput::estimateBitsMode8($p) // + 4 + l8

                         + QRinput::estimateBitsModeNum($q - $p) + 4 + $ln

                         - QRinput::estimateBitsMode8($q); // - 4 - l8

                    if ($dif < 0) {

                        break;

                    } else {

                        $p = $q;

                    }

                } else if ($mode == QR_MODE_AN) {

                    $q = $p;

                    while (self::isalnumat($this->dataStr, $q)) {

                        $q++;

                    }

                    $dif = QRinput::estimateBitsMode8($p)  // + 4 + l8

                         + QRinput::estimateBitsModeAn($q - $p) + 4 + $la

                         - QRinput::estimateBitsMode8($q); // - 4 - l8

                    if ($dif < 0) {

                        break;

                    } else {

                        $p = $q;

                    }

                } else {

                    $p++;

                }

            }


            $run = $p;

            $ret = $this->input->append(QR_MODE_8, $run, str_split($this->dataStr));

            

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

            return $run;

        }


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

        public function splitString()

        {

            while (strlen($this->dataStr) > 0)

            {

                if ($this->dataStr == '') {
                                    return 0;
                }

                $mode = $this->identifyMode(0);

                

                switch ($mode) {

                case QR_MODE_NUM: $length = $this->eatNum(); break;

                case QR_MODE_AN:  $length = $this->eatAn(); break;

                case QR_MODE_KANJI:

                    if ($this->modeHint == QR_MODE_KANJI) {
                                                $length = $this->eatKanji();
                    } 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);

            }

        }


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

        public function toUpper()

        {

            $stringLen = strlen($this->dataStr);

            $p = 0;

            

            while ($p < $stringLen) {

                $mode = self::identifyMode(substr($this->dataStr, $p));

The method QRsplit::identifyMode() is not static, but was called statically.

                if ($mode == QR_MODE_KANJI) {

                    $p += 2;

                } else {

                    if (ord($this->dataStr[$p]) >= ord('a') && ord($this->dataStr[$p]) <= ord('z')) {

                        $this->dataStr[$p] = chr(ord($this->dataStr[$p]) - 32);

                    }

                    $p++;

                }

            }


            return $this->dataStr;

        }


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

        public static function splitStringToQRinput($string, QRinput $input, $modeHint, $casesensitive = true)

        {

            if (is_null($string) || $string == '\0' || $string == '') {

                throw new Exception('empty string!!!');

            }


            $split = new QRsplit($string, $input, $modeHint);

            

            if (!$casesensitive) {
                            $split->toUpper();
            }
                

            return $split->splitString();

        }

    }



//---- qrrscode.php -----------------------------




/*

 * PHP QR Code encoder

 *

 * Reed-Solomon error correction support

 * 

 * Copyright (C) 2002, 2003, 2004, 2006 Phil Karn, KA9Q

 * (libfec is released under the GNU Lesser General Public License.)

 *

 * Based on libqrencode C library distributed under LGPL 2.1

 * Copyright (C) 2006, 2007, 2008, 2009 Kentaro Fukuchi <fukuchi@megaui.net>

 *

 * PHP QR Code is distributed under LGPL 3

 * Copyright (C) 2010 Dominik Dzienia <deltalab at poczta dot fm>

 *

 * 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

 */

 

    class QRrsItem {

    

        public $mm; // Bits per symbol 

        public $nn; // Symbols per block (= (1<<mm)-1) 

        public $alpha_to = array(); // log lookup table 

        public $index_of = array(); // Antilog lookup table 

        public $genpoly = array(); // Generator polynomial 

        public $nroots; // Number of generator roots = number of parity symbols 

        public $fcr; // First consecutive root, index form 

        public $prim; // Primitive element, index form 

        public $iprim; // prim-th root of 1, index form 

        public $pad; // Padding bytes in shortened block 

        public $gfpoly;

    

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

        public function modnn($x)

        {

            while ($x >= $this->nn) {

                $x -= $this->nn;

                $x = ($x >> $this->mm) + ($x & $this->nn);

            }

            

            return $x;

        }

        

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

        public static function init_rs_char($symsize, $gfpoly, $fcr, $prim, $nroots, $pad)

        {

            // Common code for intializing a Reed-Solomon control block (char or int symbols)

            // Copyright 2004 Phil Karn, KA9Q

            // May be used under the terms of the GNU Lesser General Public License (LGPL)


            $rs = null;

            

            // Check parameter ranges

            if ($symsize < 0 || $symsize > 8) {
                return $rs;
            }
            if ($fcr < 0 || $fcr >= (1 << $symsize)) {
                return $rs;
            }
            if ($prim <= 0 || $prim >= (1 << $symsize)) {
                return $rs;
            }
            if ($nroots < 0 || $nroots >= (1 << $symsize)) {
                return $rs;
            }
            // Can't have more roots than symbol values!

            if ($pad < 0 || $pad >= ((1 << $symsize) - 1 - $nroots)) {
                return $rs;
            }
            // Too much padding


            $rs = new QRrsItem();

            $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!

                $rs = null;

                return $rs;

            }


            /* 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] ^ $rs->alpha_to[$rs->modnn($rs->index_of[$rs->genpoly[$j]] + $root)];

                    } else {

                        $rs->genpoly[$j] = $rs->genpoly[$j - 1];

                    }

                }

                // rs->genpoly[0] can never be zero

                $rs->genpoly[0] = $rs->alpha_to[$rs->modnn($rs->index_of[$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;

        }

        

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

        public function encode_rs_char($data, &$parity)

        {

            $MM       = & $this->mm;

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

            $NN       = & $this->nn;

            $ALPHA_TO = & $this->alpha_to;

            $INDEX_OF = & $this->index_of;

            $GENPOLY  = & $this->genpoly;

            $NROOTS   = & $this->nroots;

            $FCR      = & $this->fcr;

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

            $PRIM     = & $this->prim;

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

            $IPRIM    = & $this->iprim;

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

            $PAD      = & $this->pad;

            $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 = $this->modnn($NN - $GENPOLY[$NROOTS] + $feedback);

            

                    for ($j = 1; $j < $NROOTS; $j++) {

                        $parity[$j] ^= $ALPHA_TO[$this->modnn($feedback + $GENPOLY[$NROOTS - $j])];

                    }

                }

                

                // Shift 

                array_shift($parity);

                if ($feedback != $A0) {

                    array_push($parity, $ALPHA_TO[$this->modnn($feedback + $GENPOLY[0])]);

                } else {

                    array_push($parity, 0);

                }

            }

        }

    }

    

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

    

    class QRrs {

    

        public static $items = array();

        

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

        public static function init_rs($symsize, $gfpoly, $fcr, $prim, $nroots, $pad)

        {

            foreach (self::$items as $rs) {

                if ($rs->pad != $pad) {
                    continue;
                }
                if ($rs->nroots != $nroots) {
                    continue;
                }
                if ($rs->mm != $symsize) {
                    continue;
                }
                if ($rs->gfpoly != $gfpoly) {
                    continue;
                }
                if ($rs->fcr != $fcr) {
                    continue;
                }
                if ($rs->prim != $prim) {
                    continue;
                }

                return $rs;

            }


            $rs = QRrsItem::init_rs_char($symsize, $gfpoly, $fcr, $prim, $nroots, $pad);

            array_unshift(self::$items, $rs);


            return $rs;

        }

    }



//---- qrmask.php -----------------------------




/*

 * PHP QR Code encoder

 *

 * Masking

 *

 * Based on libqrencode C library distributed under LGPL 2.1

 * Copyright (C) 2006, 2007, 2008, 2009 Kentaro Fukuchi <fukuchi@megaui.net>

 *

 * PHP QR Code is distributed under LGPL 3

 * Copyright (C) 2010 Dominik Dzienia <deltalab at poczta dot fm>

 *

 * 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

 */

 

    define('N1', 3);

    define('N2', 3);

    define('N3', 40);

    define('N4', 10);


    class QRmask {

	

        public $runLength = array();

		

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

        public function __construct() 

        {

            $this->runLength = array_fill(0, QRSPEC_WIDTH_MAX + 1, 0);

        }

        

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

        public function writeFormatInformation($width, &$frame, $mask, $level)

        {

            $blacks = 0;

            $format = QRspec::getFormatInfo($mask, $level);


            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;

        }

        

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

        public function mask0($x, $y) { return ($x + $y) & 1; }

        public function mask1($x, $y) { return ($y & 1); }

        public function mask2($x, $y) { return ($x % 3); }

        public function mask3($x, $y) { return ($x + $y) % 3; }

        public function mask4($x, $y) { return (((int) ($y / 2)) + ((int) ($x / 3))) & 1; }

        public function mask5($x, $y) { return (($x * $y) & 1) + ($x * $y) % 3; }

        public function mask6($x, $y) { return ((($x * $y) & 1) + ($x * $y) % 3) & 1; }

        public function mask7($x, $y) { return ((($x * $y) % 3) + (($x + $y) & 1)) & 1; }

        

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

        private 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 {

                        $maskFunc = call_user_func(array($this, 'mask'.$maskNo), $x, $y);

                        $bitMask[$y][$x] = ($maskFunc == 0) ? 1 : 0;

                    }

                    

                }

            }

            

            return $bitMask;

        }

        

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

        public static function serial($bitFrame)

        {

            $codeArr = array();

            

            foreach ($bitFrame as $line) {
                            $codeArr[] = join('', $line);
            }
                

            return gzcompress(join("\n", $codeArr), 9);

        }

        

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

        public static function unserial($code)

        {

            $codeArr = array();

            

            $codeLines = explode("\n", gzuncompress($code));

            foreach ($codeLines as $line) {
                            $codeArr[] = str_split($line);
            }
            

            return $codeArr;

        }

        

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

        public function makeMaskNo($maskNo, $width, $s, &$d, $maskGenOnly = false) 

        {

            $b = 0;

            $bitMask = array();

            

            $fileName = QR_CACHE_DIR.'mask_'.$maskNo.DIRECTORY_SEPARATOR.'mask_'.$width.'_'.$maskNo.'.dat';


            if (QR_CACHEABLE) {

                if (file_exists($fileName)) {

                    $bitMask = self::unserial(file_get_contents($fileName));

                } else {

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

                    if (!file_exists(QR_CACHE_DIR.'mask_'.$maskNo)) {
                                            mkdir(QR_CACHE_DIR.'mask_'.$maskNo);
                    }
                    file_put_contents($fileName, self::serial($bitMask));

                }

            } else {

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

            }


            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;

        }

        

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

        public function makeMask($width, $frame, $maskNo, $level)

        {

            $masked = array_fill(0, $width, str_repeat("\0", $width));

            $this->makeMaskNo($maskNo, $width, $frame, $masked);

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

       

            return $masked;

        }

        

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

        public function calcN1N3($length)

        {

            $demerit = 0;


            for ($i = 0; $i < $length; $i++) {

                

                if ($this->runLength[$i] >= 5) {

                    $demerit += (N1 + ($this->runLength[$i] - 5));

                }

                if ($i & 1) {

                    if (($i >= 3) && ($i < ($length - 2)) && ($this->runLength[$i] % 3 == 0)) {

                        $fact = (int) ($this->runLength[$i] / 3);

                        if (($this->runLength[$i - 2] == $fact) &&

                           ($this->runLength[$i - 1] == $fact) &&

                           ($this->runLength[$i + 1] == $fact) &&

                           ($this->runLength[$i + 2] == $fact)) {

                            if (($this->runLength[$i - 3] < 0) || ($this->runLength[$i - 3] >= (4 * $fact))) {

                                $demerit += N3;

                            } else if ((($i + 3) >= $length) || ($this->runLength[$i + 3] >= (4 * $fact))) {

                                $demerit += N3;

                            }

                        }

                    }

                }

            }

            return $demerit;

        }

        

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

        public 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 (($x > 0) && ($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 (($x == 0) && (ord($frameY[$x]) & 1)) {

                        $this->runLength[0] = -1;

                        $head = 1;

                        $this->runLength[$head] = 1;

                    } else if ($x > 0) {

                        if ((ord($frameY[$x]) ^ ord($frameY[$x - 1])) & 1) {

                            $head++;

                            $this->runLength[$head] = 1;

                        } else {

                            $this->runLength[$head]++;

                        }

                    }

                }

    

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

            }


            for ($x = 0; $x < $width; $x++) {

                $head = 0;

                $this->runLength[0] = 1;

                

                for ($y = 0; $y < $width; $y++) {

                    if ($y == 0 && (ord($frame[$y][$x]) & 1)) {

                        $this->runLength[0] = -1;

                        $head = 1;

                        $this->runLength[$head] = 1;

                    } else if ($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;

        }

        

        

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

        public function mask($width, $frame, $level)

        {

            $minDemerit = PHP_INT_MAX;

            $bestMaskNum = 0;

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

            $bestMask = array();

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

            

            $checked_masks = array(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);

                

                if ($demerit < $minDemerit) {

                    $minDemerit = $demerit;

                    $bestMask = $mask;

                    $bestMaskNum = $i;

                }

            }

            

            return $bestMask;

        }

        

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

    }





//---- qrencode.php -----------------------------




/*

 * PHP QR Code encoder

 *

 * Main encoder classes.

 *

 * Based on libqrencode C library distributed under LGPL 2.1

 * Copyright (C) 2006, 2007, 2008, 2009 Kentaro Fukuchi <fukuchi@megaui.net>

 *

 * PHP QR Code is distributed under LGPL 3

 * Copyright (C) 2010 Dominik Dzienia <deltalab at poczta dot fm>

 *

 * 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

 */

 

    class QRrsblock {

        public $dataLength;

        public $data = array();

        public $eccLength;

        public $ecc = array();

        

        public function __construct($dl, $data, $el, &$ecc, QRrsItem $rs)

        {

            $rs->encode_rs_char($data, $ecc);

        

            $this->dataLength = $dl;

            $this->data = $data;

            $this->eccLength = $el;

            $this->ecc = $ecc;

        }

    };

    

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


    class QRrawcode {

        public $version;

        public $datacode = array();

        public $ecccode = array();

        public $blocks;

        public $rsblocks = array(); //of RSblock

        public $count;

        public $dataLength;

        public $eccLength;

        public $b1;

        

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

        public function __construct(QRinput $input)

        {

            $spec = array(0, 0, 0, 0, 0);

            

            $this->datacode = $input->getByteStream();

Are you sure the assignment to $this->datacode is correct as $input->getByteStream() targeting QRinput::getByteStream() seems to always return null.

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

The condition is_null($this->datacode) is always true.

                throw new Exception('null imput string');

            }


            QRspec::getEccSpec($input->getVersion(), $input->getErrorCorrectionLevel(), $spec);


            $this->version = $input->getVersion();

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

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

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

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

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

            

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

            if ($ret < 0) {

                throw new Exception('block alloc error');

                return null;

return null is not reachable.

            }


            $this->count = 0;

        }

        

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

        public function init(array $spec)

        {

            $dl = QRspec::rsDataCodes1($spec);

            $el = QRspec::rsEccCodes1($spec);

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

            


            $blockNo = 0;

            $dataPos = 0;

            $eccPos = 0;

            for ($i = 0; $i < QRspec::rsBlockNum1($spec); $i++) {

                $ecc = array_slice($this->ecccode, $eccPos);

                $this->rsblocks[$blockNo] = new QRrsblock($dl, array_slice($this->datacode, $dataPos), $el, $ecc, $rs);

It seems like $rs can also be of type null; however, parameter $rs of QRrsblock::__construct() does only seem to accept QRrsItem, maybe add an additional type check?

                $this->ecccode = array_merge(array_slice($this->ecccode, 0, $eccPos), $ecc);

                

                $dataPos += $dl;

                $eccPos += $el;

                $blockNo++;

            }


            if (QRspec::rsBlockNum2($spec) == 0) {
                            return 0;
            }

            $dl = QRspec::rsDataCodes2($spec);

            $el = QRspec::rsEccCodes2($spec);

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

            

            if ($rs == null) {
                return -1;
            }
            

            for ($i = 0; $i < QRspec::rsBlockNum2($spec); $i++) {

                $ecc = array_slice($this->ecccode, $eccPos);

                $this->rsblocks[$blockNo] = new QRrsblock($dl, array_slice($this->datacode, $dataPos), $el, $ecc, $rs);

                $this->ecccode = array_merge(array_slice($this->ecccode, 0, $eccPos), $ecc);

                

                $dataPos += $dl;

                $eccPos += $el;

                $blockNo++;

            }


            return 0;

        }

        

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

        public function getCode()

        {

            $ret = 0;


            if ($this->count < $this->dataLength) {

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

                $col = $this->count / $this->blocks;

                if ($col >= $this->rsblocks[0]->dataLength) {

                    $row += $this->b1;

                }

                $ret = $this->rsblocks[$row]->data[$col];

            } else if ($this->count < $this->dataLength + $this->eccLength) {

                $row = ($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;

        }

    }


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

    

    class QRcode {

    

        public $version;

        public $width;

        public $data; 

        

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

        public function encodeMask(QRinput $input, $mask)

        {

            if ($input->getVersion() < 0 || $input->getVersion() > QRSPEC_VERSION_MAX) {

                throw new Exception('wrong version');

            }

            if ($input->getErrorCorrectionLevel() > QR_ECLEVEL_H) {

                throw new Exception('wrong level');

            }


            $raw = new QRrawcode($input);

            

            QRtools::markTime('after_raw');

            

            $version = $raw->version;

            $width = QRspec::getWidth($version);

            $frame = QRspec::newFrame($version);

            

            $filler = new FrameFiller($width, $frame);

            if (is_null($filler)) {

                return null;

            }


            // inteleaved data and ecc codes

            for ($i = 0; $i < $raw->dataLength + $raw->eccLength; $i++) {

                $code = $raw->getCode();

                $bit = 0x80;

                for ($j = 0; $j < 8; $j++) {

                    $addr = $filler->next();

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

                    $bit = $bit >> 1;

                }

            }

            

            QRtools::markTime('after_filler');

            

            unset($raw);

            

            // remainder bits

            $j = QRspec::getRemainder($version);

            for ($i = 0; $i < $j; $i++) {

                $addr = $filler->next();

                $filler->setFrameAt($addr, 0x02);

            }

            

            $frame = $filler->frame;

            unset($filler);

            

            

            // masking

            $maskObj = new QRmask();

            if ($mask < 0) {

            

                if (QR_FIND_BEST_MASK) {

                    $masked = $maskObj->mask($width, $frame, $input->getErrorCorrectionLevel());

                } else {

                    $masked = $maskObj->makeMask($width, $frame, (intval(QR_DEFAULT_MASK) % 8), $input->getErrorCorrectionLevel());

                }

            } else {

                $masked = $maskObj->makeMask($width, $frame, $mask, $input->getErrorCorrectionLevel());

            }

            

            if ($masked == null) {

                return null;

            }

            

            QRtools::markTime('after_mask');

            

            $this->version = $version;

            $this->width = $width;

            $this->data = $masked;

            

            return $this;

        }

    

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

        public function encodeInput(QRinput $input)

        {

            return $this->encodeMask($input, -1);

        }

        

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

        public function encodeString8bit($string, $version, $level)

        {

            if (string == null) {

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

                throw new Exception('empty string!');

                return null;

return null is not reachable.

            }


            $input = new QRinput($version, $level);

            if ($input == null) {
                return null;
            }

            $ret = $input->append(QR_MODE_8, strlen($string), str_split($string));

            if ($ret < 0) {

                unset($input);

                return null;

            }

            return $this->encodeInput($input);

        }


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

        public function encodeString($string, $version, $level, $hint, $casesensitive)

        {


            if ($hint != QR_MODE_8 && $hint != QR_MODE_KANJI) {

                throw new Exception('bad hint');

                return null;

return null is not reachable.

            }


            $input = new QRinput($version, $level);

            if ($input == null) {
                return null;
            }

            $ret = QRsplit::splitStringToQRinput($string, $input, $hint, $casesensitive);

            if ($ret < 0) {

                return null;

            }


            return $this->encodeInput($input);

        }

        

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

        public static function png($text, $outfile = false, $level = QR_ECLEVEL_L, $size = 3, $margin = 4, $saveandprint = false) 

The parameter $saveandprint is not used and could be removed.

        {

            $enc = QRencode::factory($level, $size, $margin);

            return $enc->encodePNG($text, $outfile, $saveandprint = false);

Are you sure the usage of $enc->encodePNG($text, $outfile, $saveandprint = false) targeting QRencode::encodePNG() seems to always return null.

        }


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

        public static function text($text, $outfile = false, $level = QR_ECLEVEL_L, $size = 3, $margin = 4) 

        {

            $enc = QRencode::factory($level, $size, $margin);

            return $enc->encode($text, $outfile);

        }


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

        public static function raw($text, $outfile = false, $level = QR_ECLEVEL_L, $size = 3, $margin = 4) 

        {

            $enc = QRencode::factory($level, $size, $margin);

            return $enc->encodeRAW($text, $outfile);

        }

    }

    

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

    

    class FrameFiller {

    

        public $width;

        public $frame;

        public $x;

        public $y;

        public $dir;

        public $bit;

        

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

        public function __construct($width, &$frame)

        {

            $this->width = $width;

            $this->frame = $frame;

            $this->x = $width - 1;

            $this->y = $width - 1;

            $this->dir = -1;

            $this->bit = -1;

        }

        

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

        public function setFrameAt($at, $val)

        {

            $this->frame[$at['y']][$at['x']] = chr($val);

        }

        

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

        public function getFrameAt($at)

        {

            return ord($this->frame[$at['y']][$at['x']]);

        }

        

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

        public function next()

        {

            do {

            

                if ($this->bit == -1) {

                    $this->bit = 0;

                    return array('x'=>$this->x, 'y'=>$this->y);

                }


                $x = $this->x;

                $y = $this->y;

                $w = $this->width;


                if ($this->bit == 0) {

                    $x--;

                    $this->bit++;

                } else {

                    $x++;

                    $y += $this->dir;

                    $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 || $y < 0) {
                    return null;
                }

                $this->x = $x;

                $this->y = $y;


            } while (ord($this->frame[$y][$x]) & 0x80);

                        

            return array('x'=>$x, 'y'=>$y);

        }

        

    } ;

    

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

    

    class QRencode {

    

        public $casesensitive = true;

        public $eightbit = false;

        

        public $version = 0;

        public $size = 3;

        public $margin = 4;

        

        public $structured = 0; // not supported yet

        

        public $level = QR_ECLEVEL_L;

        public $hint = QR_MODE_8;

        

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

        public static function factory($level = QR_ECLEVEL_L, $size = 3, $margin = 4)

        {

            $enc = new QRencode();

            $enc->size = $size;

            $enc->margin = $margin;

            

            switch ($level.'') {

            case '0':

            case '1':

            case '2':

            case '3':

                    $enc->level = $level;

                break;

            case 'l':

            case 'L':

                    $enc->level = QR_ECLEVEL_L;

                break;

            case 'm':

            case 'M':

                    $enc->level = QR_ECLEVEL_M;

                break;

            case 'q':

            case 'Q':

                    $enc->level = QR_ECLEVEL_Q;

                break;

            case 'h':

            case 'H':

                    $enc->level = QR_ECLEVEL_H;

                break;

            }

            

            return $enc;

        }

        

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

        public function encodeRAW($intext, $outfile = false) 

The parameter $outfile is not used and could be removed.

        {

            $code = new QRcode();


            if ($this->eightbit) {

                $code->encodeString8bit($intext, $this->version, $this->level);

            } else {

                $code->encodeString($intext, $this->version, $this->level, $this->hint, $this->casesensitive);

            }

            

            return $code->data;

        }


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

        public function encode($intext, $outfile = false) 

        {

            $code = new QRcode();


            if ($this->eightbit) {

                $code->encodeString8bit($intext, $this->version, $this->level);

            } else {

                $code->encodeString($intext, $this->version, $this->level, $this->hint, $this->casesensitive);

            }

            

            QRtools::markTime('after_encode');

            

            if ($outfile !== false) {

                file_put_contents($outfile, join("\n", QRtools::binarize($code->data)));

            } else {

                return QRtools::binarize($code->data);

            }

        }

        

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

        public function encodePNG($intext, $outfile = false, $saveandprint = false) 

        {

            try {

            

                ob_start();

                $tab = $this->encode($intext);

                $err = ob_get_contents();

                ob_end_clean();

                

                if ($err != '') {
                                    QRtools::log($outfile, $err);
                }
                

                $maxSize = (int) (QR_PNG_MAXIMUM_SIZE / (count($tab) + 2 * $this->margin));

                

                QRimage::png($tab, $outfile, min(max(1, $this->size), $maxSize), $this->margin, $saveandprint);

            

            } catch (Exception $e) {

            

                QRtools::log($outfile, $e->getMessage());

            

            }

        }

    }