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File: lib/Multiotp/contrib/MultiotpQrcode.php

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File: lib/Multiotp/contrib/MultiotpQrcode.php
Role: Auxiliary script
Content type: text/plain
Description: Auxiliary script
Class: PHP User Credentials
Implement password authentication policies
Author: By
Last change:
Date: 1 year ago
Size: 26,174 bytes
 

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<?php
    //////////////////////////////////////////////////////////////////////////////////
    //////////////////////////////////////////////////////////////////////////////////
    //                                                                              //
    // Custom function providing qrcode generation, based on the library from       //
    // Y. Swetake (http://www.swetake.com/qr/index-e.html)                          //
    // Last update of the original library: 2013-05-18                              //
    // Last update of the modified library: 2014-10-24                              //
    //                                                                              //
    // A better library from Dominik Dzienia exists                                 //
    //   (http://phpqrcode.sourceforge.net/), but it is not compatible with PHP 4.x //
	//   and can have incompatibilities if used with TCPDF                          //
    //                                                                              //
    // Enhancements made by SysCo/al                                                //
    //   If $file_name = "binary", send binary content without header               //
    //   Some additional parameters                                                 //
    //   Fix when calling image functions for a NULL file                           //
    //                                                                              //
    //////////////////////////////////////////////////////////////////////////////////
    //////////////////////////////////////////////////////////////////////////////////
    function MultiotpQrcode($data = '', $file_name = '', $image_type = "P", $ecc_level = "Q", $module_size = 4, $version = 0, $structure_m = 0, $structure_n = 0, $parity = 0, $original_data = '', $path = 'qrcode/data', $image_path = 'qrcode/image')
    {
        /*
        #
        # QRcode image PHP scripts  version 0.50j (C)2000-2013,Y.Swetake
        #
        #
        #
        #  This program outputs a png image of "QRcode model 2". 
        #  You cannot use a several functions of QRcode in this version. 
        #  See README.txt .
        #
        #  This version supports QRcode model2 version 1-40.
        #
        #
        #  This program requires PHP4.1 and gd 1.6 or higher.
        #
        #  You must set $path & $image_path the path to QRcode data file.
        #
        #
        # [usage]
        #   qr_img.php?d=[data]&e=[(L,M,Q,H)]&s=[int]&v=[(1-40)]
        #             (&m=[(1-16)]&n=[(2-16)](&p=[(0-255)],&o=[data]))
        #
        #   d= data         URL encoded data.
        #   e= ECC level    L or M or Q or H   (default M)
        #                   Low (L): Up to 7% of errors can be corrected.          // Info added for multiOTP
        #                   Medium-Low (M): Up to 15% of errors can be corrected.  // Info added for multiOTP
        #                   Medium-High (Q): Up to 25% of errors can be corrected. // Info added for multiOTP
        #                   High (H): Up to 30% of errors can be corrected.        // Info added for multiOTP
        #   s= module size  (default PNG:4 JPEG:8)
        #   v= version      1-40 or Auto select if you do not set.
        #   t= image type   J:jpeg image , other: PNG image
        #
        #  structured append  m of n (experimental)
        #   n= structure append n (2-16)
        #   m= structure append m (1-16)
        #   p= parity
        #   o= original data (URL encoded data)  for calculating parity
        #
        #
        #
        # THIS SOFTWARE IS PROVIDED BY Y.Swetake ``AS IS'' AND ANY EXPRESS OR
        # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
        # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
        # IN NO EVENT SHALL Y.Swetake OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
        # INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 
        # (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
        # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)  HOWEVER CAUSED 
        # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
        # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
        # USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
        #
        */

        /* ------ setting area ------ */

        $output_name = $file_name;
        
        $qrcode_image_size = 0; // Initialized for multiOTP
        $qrcode_result = NULL;  // Added for multiOTP

        $version_ul=40;              /* upper limit for version  */  
        /* ------ setting area end ------ */

        // Adapted for multiOTP (method parameters instead of URL parameters)
        $qrcode_data_string=$data;
        $qrcode_error_correct=$ecc_level;
        $qrcode_module_size=$module_size;
        $qrcode_version=$version;
        $qrcode_image_type=$image_type;

        $qrcode_structureappend_n=$structure_n;
        $qrcode_structureappend_m=$structure_m;
        $qrcode_structureappend_parity=$parity;
        $qrcode_structureappend_originaldata=$original_data;


        if (strtolower($qrcode_image_type)=="j") // Adapted for multiOTP
        {
            $qrcode_image_type="jpeg";
        }
        else
        {
            $qrcode_image_type="png";
        }

        if ($qrcode_module_size>0) {
        } else {
            if ($qrcode_image_type=="jpeg"){
                $qrcode_module_size=8;
            } else {
                $qrcode_module_size=4;
            }
        }
        $qrcode_data_string=($qrcode_data_string); // SysCo/al no rawurldecode here, because we are calling the function directly
        $data_length=strlen($qrcode_data_string);
        if ($data_length<=0) {
            trigger_error("QRcode : Data do not exist.",E_USER_ERROR);
            exit;
        }
        $data_counter=0;
        if ($qrcode_structureappend_n>1
         && $qrcode_structureappend_n<=16
         && $qrcode_structureappend_m>0
         && $qrcode_structureqppend_m<=16){

            $data_value[0]=3;
            $data_bits[0]=4;

            $data_value[1]=$qrcode_structureappend_m-1;
            $data_bits[1]=4;

            $data_value[2]=$qrcode_structureappend_n-1;
            $data_bits[2]=4;


            $originaldata_length=strlen($qrcode_structureappend_originaldata);
            if ($originaldata_length>1){
                $qrcode_structureappend_parity=0;
                $i=0;
                while ($i<$originaldata_length){
                    $qrcode_structureappend_parity=($qrcode_structureappend_parity ^ ord(substr($qrcode_structureappend_originaldata,$i,1)));
                    $i++;
                }
            }

            $data_value[3]=$qrcode_structureappend_parity;
            $data_bits[3]=8;

            $data_counter=4;
        }

        $data_bits[$data_counter]=4;

        /*  --- determine encode mode */

        if (preg_match("/[^0-9]/",$qrcode_data_string)!=0){
            if (preg_match("/[^0-9A-Z \$\*\%\+\.\/\:\-]/",$qrcode_data_string)!=0) {


             /*  --- 8bit byte mode */

                $codeword_num_plus=array(0,0,0,0,0,0,0,0,0,0,
        8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
        8,8,8,8,8,8,8,8,8,8,8,8,8,8);

                $data_value[$data_counter]=4;
                $data_counter++;
                $data_value[$data_counter]=$data_length;
                $data_bits[$data_counter]=8;   /* #version 1-9 */
                $codeword_num_counter_value=$data_counter;

                $data_counter++;
                $i=0;
                while ($i<$data_length){
                    $data_value[$data_counter]=ord(substr($qrcode_data_string,$i,1));
                    $data_bits[$data_counter]=8;
                    $data_counter++;
                    $i++;
                }
            } else {

            /* ---- alphanumeric mode */

                $codeword_num_plus=array(0,0,0,0,0,0,0,0,0,0,
        2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
        4,4,4,4,4,4,4,4,4,4,4,4,4,4);

                $data_value[$data_counter]=2;
                $data_counter++;
                $data_value[$data_counter]=$data_length;
                $data_bits[$data_counter]=9;  /* #version 1-9 */
                $codeword_num_counter_value=$data_counter;


                $alphanumeric_character_hash=array("0"=>0,"1"=>1,"2"=>2,"3"=>3,"4"=>4,
        "5"=>5,"6"=>6,"7"=>7,"8"=>8,"9"=>9,"A"=>10,"B"=>11,"C"=>12,"D"=>13,"E"=>14,
        "F"=>15,"G"=>16,"H"=>17,"I"=>18,"J"=>19,"K"=>20,"L"=>21,"M"=>22,"N"=>23,
        "O"=>24,"P"=>25,"Q"=>26,"R"=>27,"S"=>28,"T"=>29,"U"=>30,"V"=>31,
        "W"=>32,"X"=>33,"Y"=>34,"Z"=>35," "=>36,"$"=>37,"%"=>38,"*"=>39,
        "+"=>40,"-"=>41,"."=>42,"/"=>43,":"=>44);

                $i=0;
                $data_counter++;
                while ($i<$data_length){
                    if (($i %2)==0){
                        $data_value[$data_counter]=$alphanumeric_character_hash[substr($qrcode_data_string,$i,1)];
                        $data_bits[$data_counter]=6;
                    } else {
                        $data_value[$data_counter]=$data_value[$data_counter]*45+$alphanumeric_character_hash[substr($qrcode_data_string,$i,1)];
                        $data_bits[$data_counter]=11;
                        $data_counter++;
                    }
                    $i++;
                }
            }
        } else {

            /* ---- numeric mode */

            $codeword_num_plus=array(0,0,0,0,0,0,0,0,0,0,
        2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
        4,4,4,4,4,4,4,4,4,4,4,4,4,4);

            $data_value[$data_counter]=1;
            $data_counter++;
            $data_value[$data_counter]=$data_length;
            $data_bits[$data_counter]=10;   /* #version 1-9 */
            $codeword_num_counter_value=$data_counter;

            $i=0;
            $data_counter++;
            while ($i<$data_length){
                if (($i % 3)==0){
                    $data_value[$data_counter]=substr($qrcode_data_string,$i,1);
                    $data_bits[$data_counter]=4;
                } else {
                     $data_value[$data_counter]=$data_value[$data_counter]*10+substr($qrcode_data_string,$i,1);
                 if (($i % 3)==1){
                     $data_bits[$data_counter]=7;
                 } else {
                     $data_bits[$data_counter]=10;
                     $data_counter++;
                 }
                }
                $i++;
            }
        }
        if (@$data_bits[$data_counter]>0) {
            $data_counter++;
        }
        $i=0;
        $total_data_bits=0;
        while($i<$data_counter){
            $total_data_bits+=$data_bits[$i];
            $i++;
        }


        $ecc_character_hash=array("L"=>"1",
        "l"=>"1",
        "M"=>"0",
        "m"=>"0",
        "Q"=>"3",
        "q"=>"3",
        "H"=>"2",
        "h"=>"2");

         $ec=@$ecc_character_hash[$qrcode_error_correct]; 

         if (!$ec){$ec=0;}

        $max_data_bits_array=array(
        0,128,224,352,512,688,864,992,1232,1456,1728,
        2032,2320,2672,2920,3320,3624,4056,4504,5016,5352,
        5712,6256,6880,7312,8000,8496,9024,9544,10136,10984,
        11640,12328,13048,13800,14496,15312,15936,16816,17728,18672,

        152,272,440,640,864,1088,1248,1552,1856,2192,
        2592,2960,3424,3688,4184,4712,5176,5768,6360,6888,
        7456,8048,8752,9392,10208,10960,11744,12248,13048,13880,
        14744,15640,16568,17528,18448,19472,20528,21616,22496,23648,

        72,128,208,288,368,480,528,688,800,976,
        1120,1264,1440,1576,1784,2024,2264,2504,2728,3080,
        3248,3536,3712,4112,4304,4768,5024,5288,5608,5960,
        6344,6760,7208,7688,7888,8432,8768,9136,9776,10208,

        104,176,272,384,496,608,704,880,1056,1232,
        1440,1648,1952,2088,2360,2600,2936,3176,3560,3880,
        4096,4544,4912,5312,5744,6032,6464,6968,7288,7880,
        8264,8920,9368,9848,10288,10832,11408,12016,12656,13328
        );
        if (!is_numeric($qrcode_version)){
            $qrcode_version=0;
        }
        if (!$qrcode_version){
         /* #--- auto version select */
            $i=1+40*$ec;
            $j=$i+39;
            $qrcode_version=1; 
            while ($i<=$j){
                if (($max_data_bits_array[$i])>=$total_data_bits+$codeword_num_plus[$qrcode_version]     ){
                    $max_data_bits=$max_data_bits_array[$i];
                    break;
                }
             $i++;
             $qrcode_version++;
            }
        } else {
             $max_data_bits=$max_data_bits_array[$qrcode_version+40*$ec];
        }
        if ($qrcode_version>$version_ul){
          trigger_error("QRcode : too large version.",E_USER_ERROR);
        }

        $total_data_bits+=$codeword_num_plus[$qrcode_version];
            $data_bits[$codeword_num_counter_value]+=$codeword_num_plus[$qrcode_version];

        $max_codewords_array=array(0,26,44,70,100,134,172,196,242,
        292,346,404,466,532,581,655,733,815,901,991,1085,1156,
        1258,1364,1474,1588,1706,1828,1921,2051,2185,2323,2465,
        2611,2761,2876,3034,3196,3362,3532,3706);

        $max_codewords=$max_codewords_array[$qrcode_version];
        $max_modules_1side=17+($qrcode_version <<2);

        $matrix_remain_bit=array(0,0,7,7,7,7,7,0,0,0,0,0,0,0,3,3,3,3,3,3,3,
        4,4,4,4,4,4,4,3,3,3,3,3,3,3,0,0,0,0,0,0);

        /* ---- read version ECC data file */

        $byte_num=$matrix_remain_bit[$qrcode_version]+($max_codewords << 3);
        $filename=$path."/qrv".$qrcode_version."_".$ec.".dat";
        $fp1 = fopen ($filename, "rb");
            $matx=fread($fp1,$byte_num);
            $maty=fread($fp1,$byte_num);
            $masks=fread($fp1,$byte_num);
            $fi_x=fread($fp1,15);
            $fi_y=fread($fp1,15);
            $rs_ecc_codewords=ord(fread($fp1,1));
            $rso=fread($fp1,128);
        fclose($fp1);

        $matrix_x_array=unpack("C*",$matx);
        $matrix_y_array=unpack("C*",$maty);
        $mask_array=unpack("C*",$masks);

        $rs_block_order=unpack("C*",$rso);

        $format_information_x2=unpack("C*",$fi_x);
        $format_information_y2=unpack("C*",$fi_y);

        $format_information_x1=array(0,1,2,3,4,5,7,8,8,8,8,8,8,8,8);
        $format_information_y1=array(8,8,8,8,8,8,8,8,7,5,4,3,2,1,0);

        $max_data_codewords=($max_data_bits >>3);

        $filename = $path."/rsc".$rs_ecc_codewords.".dat";
        $fp0 = fopen ($filename, "rb");
        $i=0;
        while ($i<256) {
            $rs_cal_table_array[$i]=fread ($fp0,$rs_ecc_codewords);
            $i++;
        }
        fclose ($fp0);

        /*  --- set terminator */

        if ($total_data_bits<=$max_data_bits-4){
            $data_value[$data_counter]=0;
            $data_bits[$data_counter]=4;
        } else {
            if ($total_data_bits<$max_data_bits){
            $data_value[$data_counter]=0;
                $data_bits[$data_counter]=$max_data_bits-$total_data_bits;
            } else {
                if ($total_data_bits>$max_data_bits){
                trigger_error("QRcode : Overflow error",E_USER_ERROR);
                exit;
                }
            }
        }

        /* ----divide data by 8bit */

        $i=0;
        $codewords_counter=0;
        $codewords[0]=0;
        $remaining_bits=8;

        while ($i<=$data_counter) {
            $buffer=@$data_value[$i];
            $buffer_bits=@$data_bits[$i];

            $flag=1;
            while ($flag) {
                if ($remaining_bits>$buffer_bits){  
                    $codewords[$codewords_counter]=((@$codewords[$codewords_counter]<<$buffer_bits) | $buffer);
                    $remaining_bits-=$buffer_bits;
                    $flag=0;
                } else {
                    $buffer_bits-=$remaining_bits;
                    $codewords[$codewords_counter]=(($codewords[$codewords_counter] << $remaining_bits) | ($buffer >> $buffer_bits));

                    if ($buffer_bits==0) {
                        $flag=0;
                    } else {
                        $buffer= ($buffer & ((1 << $buffer_bits)-1) );
                        $flag=1;   
                    }

                    $codewords_counter++;
                    if ($codewords_counter<$max_data_codewords-1){
                        $codewords[$codewords_counter]=0;
                    }
                    $remaining_bits=8;
                }
            }
            $i++;
        }
        if ($remaining_bits!=8) {
            $codewords[$codewords_counter]=$codewords[$codewords_counter] << $remaining_bits;
        } else {
            $codewords_counter--;
        }

        /* ----  set padding character */

        if ($codewords_counter<$max_data_codewords-1){
            $flag=1;
            while ($codewords_counter<$max_data_codewords-1){
                $codewords_counter++;
                if ($flag==1) {
                    $codewords[$codewords_counter]=236;
                } else {
                    $codewords[$codewords_counter]=17;
                }
                $flag=$flag*(-1);
            }
        }

        /* ---- RS-ECC prepare */

        $i=0;
        $j=0;
        $rs_block_number=0;
        $rs_temp[0]="";

        while($i<$max_data_codewords){

            $rs_temp[$rs_block_number].=chr($codewords[$i]);
            $j++;

            if ($j>=$rs_block_order[$rs_block_number+1]-$rs_ecc_codewords){
                $j=0;
                $rs_block_number++;
                $rs_temp[$rs_block_number]="";
            }
            $i++;
        }


        /*
        #
        # RS-ECC main
        #
        */

        $rs_block_number=0;
        $rs_block_order_num=count($rs_block_order);

        while ($rs_block_number<$rs_block_order_num){

            $rs_codewords=$rs_block_order[$rs_block_number+1];
            $rs_data_codewords=$rs_codewords-$rs_ecc_codewords;

            $rstemp=$rs_temp[$rs_block_number].str_repeat(chr(0),$rs_ecc_codewords);
            $padding_data=str_repeat(chr(0),$rs_data_codewords);

            $j=$rs_data_codewords;
            while($j>0){
                $first=ord(substr($rstemp,0,1));

                if ($first){
                    $left_chr=substr($rstemp,1);
                    $cal=$rs_cal_table_array[$first].$padding_data;
                    $rstemp=$left_chr ^ $cal;
                } else {
                    $rstemp=substr($rstemp,1);
                }

                $j--;
            }

            $codewords=array_merge($codewords,unpack("C*",$rstemp));

            $rs_block_number++;
        }

        /* ---- flash matrix */

        $i=0;
        while ($i<$max_modules_1side){
            $j=0;
            while ($j<$max_modules_1side){
                $matrix_content[$j][$i]=0;
                $j++;
            }
            $i++;
        }

        /* --- attach data */

        $i=0;
        while ($i<$max_codewords){
            $codeword_i=$codewords[$i];
            $j=8;
            while ($j>=1){
                $codeword_bits_number=($i << 3) +  $j;
                $matrix_content[ $matrix_x_array[$codeword_bits_number] ][ $matrix_y_array[$codeword_bits_number] ]=((255*($codeword_i & 1)) ^ $mask_array[$codeword_bits_number] ); 
                $codeword_i= $codeword_i >> 1;
                $j--;
            }
            $i++;
        }

        $matrix_remain=$matrix_remain_bit[$qrcode_version];
        while ($matrix_remain){
            $remain_bit_temp = $matrix_remain + ( $max_codewords <<3);
            $matrix_content[ $matrix_x_array[$remain_bit_temp] ][ $matrix_y_array[$remain_bit_temp] ]  =  ( 0 ^ $mask_array[$remain_bit_temp] );
            $matrix_remain--;
        }

        #--- mask select

        $min_demerit_score=0;
            $hor_master="";
            $ver_master="";
            $k=0;
            while($k<$max_modules_1side){
                $l=0;
                while($l<$max_modules_1side){
                    $hor_master=$hor_master.chr($matrix_content[$l][$k]);
                    $ver_master=$ver_master.chr($matrix_content[$k][$l]);
                    $l++;
                }
                $k++;
            }
        $i=0;
        $all_matrix=$max_modules_1side * $max_modules_1side; 
        while ($i<8){
            $demerit_n1=0;
            $ptn_temp=array();
            $bit= 1<< $i;
            $bit_r=(~$bit)&255;
            $bit_mask=str_repeat(chr($bit),$all_matrix);
            $hor = $hor_master & $bit_mask;
            $ver = $ver_master & $bit_mask;

            $ver_shift1=$ver.str_repeat(chr(170),$max_modules_1side);
            $ver_shift2=str_repeat(chr(170),$max_modules_1side).$ver;
            $ver_shift1_0=$ver.str_repeat(chr(0),$max_modules_1side);
            $ver_shift2_0=str_repeat(chr(0),$max_modules_1side).$ver;
            $ver_or=chunk_split(~($ver_shift1 | $ver_shift2),$max_modules_1side,chr(170));
            $ver_and=chunk_split(~($ver_shift1_0 & $ver_shift2_0),$max_modules_1side,chr(170));

            $hor=chunk_split(~$hor,$max_modules_1side,chr(170));
            $ver=chunk_split(~$ver,$max_modules_1side,chr(170));
            $hor=$hor.chr(170).$ver;

            $n1_search="/".str_repeat(chr(255),5)."+|".str_repeat(chr($bit_r),5)."+/";
            $n3_search=chr($bit_r).chr(255).chr($bit_r).chr($bit_r).chr($bit_r).chr(255).chr($bit_r);

           $demerit_n3=substr_count($hor,$n3_search)*40;
           $demerit_n4=floor(abs(( (100* (substr_count($ver,chr($bit_r))/($byte_num)) )-50)/5))*10;


           $n2_search1="/".chr($bit_r).chr($bit_r)."+/";
           $n2_search2="/".chr(255).chr(255)."+/";
           $demerit_n2=0;
           preg_match_all($n2_search1,$ver_and,$ptn_temp);
           foreach($ptn_temp[0] as $str_temp){
               $demerit_n2+=(strlen($str_temp)-1);
           }
           $ptn_temp=array();
           preg_match_all($n2_search2,$ver_or,$ptn_temp);
           foreach($ptn_temp[0] as $str_temp){
               $demerit_n2+=(strlen($str_temp)-1);
           }
           $demerit_n2*=3;
          
           $ptn_temp=array();

           preg_match_all($n1_search,$hor,$ptn_temp);
           foreach($ptn_temp[0] as $str_temp){
               $demerit_n1+=(strlen($str_temp)-2);
           }

           $demerit_score=$demerit_n1+$demerit_n2+$demerit_n3+$demerit_n4;

           if ($demerit_score<=$min_demerit_score || $i==0){
                $mask_number=$i;
                $min_demerit_score=$demerit_score;
           }

        $i++;
        }

        $mask_content=1 << $mask_number;

        # --- format information

        $format_information_value=(($ec << 3) | $mask_number);
        $format_information_array=array("101010000010010","101000100100101",
        "101111001111100","101101101001011","100010111111001","100000011001110",
        "100111110010111","100101010100000","111011111000100","111001011110011",
        "111110110101010","111100010011101","110011000101111","110001100011000",
        "110110001000001","110100101110110","001011010001001","001001110111110",
        "001110011100111","001100111010000","000011101100010","000001001010101",
        "000110100001100","000100000111011","011010101011111","011000001101000",
        "011111100110001","011101000000110","010010010110100","010000110000011",
        "010111011011010","010101111101101");
        $i=0;
        while ($i<15){
            $content=substr($format_information_array[$format_information_value],$i,1);

            $matrix_content[$format_information_x1[$i]][$format_information_y1[$i]]=$content * 255;
            $matrix_content[$format_information_x2[$i+1]][$format_information_y2[$i+1]]=$content * 255;
            $i++;
        }


        $mib=$max_modules_1side+8;
        $qrcode_image_size=$mib*$qrcode_module_size;
        if ($qrcode_image_size>1480){
          trigger_error("QRcode : Too large image size",E_USER_ERROR);
        }
        $output_image =ImageCreate($qrcode_image_size,$qrcode_image_size);

        $image_path=$image_path."/qrv".$qrcode_version.".png";

        $base_image=ImageCreateFromPNG($image_path);

        $col[1]=ImageColorAllocate($base_image,0,0,0);
        $col[0]=ImageColorAllocate($base_image,255,255,255);

        $i=4;
        $mxe=4+$max_modules_1side;
        $ii=0;
        while ($i<$mxe){
            $j=4;
            $jj=0;
            while ($j<$mxe){
                if ($matrix_content[$ii][$jj] & $mask_content){
                    ImageSetPixel($base_image,$i,$j,$col[1]); 
                }
                $j++;
                $jj++;
            }
            $i++;
            $ii++;
        }
        /*
        #--- output image
        #
        */
        
        // Adapted for multiOTP in order to choose either display output or file output
        ImageCopyResized($output_image,$base_image,0,0,0,0,$qrcode_image_size,$qrcode_image_size,$mib,$mib);
        if ('' == trim($file_name))
        {
            Header("Content-type: image/".$qrcode_image_type);
            $output_name = NULL;
        }
        if ('binary' == trim($file_name))
        {
            $output_name = NULL;
            ob_start();
        }
        if ($qrcode_image_type == "jpeg")
        {
            if (NULL == $output_name)
            {
                ImageJpeg($output_image);
            }
            else
            {
                ImageJpeg($output_image, $output_name);
            }
        }
        else
        {
            if (NULL == $output_name)
            {
                ImagePng($output_image);
            }
            else
            {
                ImagePng($output_image, $output_name);
            }
        }
        if ('binary' == trim($file_name))
        {
            $qrcode_result = ob_get_clean();
        }
        else
        {
            $qrcode_result = $qrcode_image_size;
        }
        imagedestroy($base_image);
        imagedestroy($output_image);
        
        return $qrcode_result;
    }
?>