Instead using external API (api.qrserver.com) .. use chillerlan/php-qrcode

Dockerfile

@@ -1,15 +1,82 @@
-FROM php:latest
+FROM php:8.3
 
-RUN apt-get update && \
-    apt-get install -y --no-install-recommends less nano tini curl bash tar git zip unzip && \
-    #echo "**** # To install networking tools for testing purpose ****" && \
-    apt-get install -y --no-install-recommends iputils-ping dnsutils net-tools procps && \
-    #echo "**** cleanup ****" && \
-    apt-get autoremove -y && \
-    apt-get clean -y
+RUN if [ "$(grep '^VERSION_ID=' /etc/os-release | cut -d '=' -f 2 | tr -d '"')" -eq "9" ]; then \
+        sed -i -e 's/deb.debian.org/archive.debian.org/g' \
+               -e 's/security.debian.org/archive.debian.org/g' \
+               -e '/stretch-updates/d' /etc/apt/sources.list; \
+    fi
 
-RUN apt-get update
-RUN apt-get install -y --no-install-recommends libzip-dev libjpeg62-turbo-dev libpng-dev libfreetype6-dev
+# Download script to install PHP extensions and dependencies
+ADD https://github.com/mlocati/docker-php-extension-installer/releases/latest/download/install-php-extensions /usr/local/bin/
+
+RUN chmod +x /usr/local/bin/install-php-extensions
+
+RUN DEBIAN_FRONTEND=noninteractive apt-get update -q \
+    && DEBIAN_FRONTEND=noninteractive apt-get install -qq -y \
+      curl \
+      dnsutils \
+      git \
+      iputils-ping \
+      less \
+      libzip-dev \
+      libjpeg62-turbo-dev \
+      libpng-dev \
+      libfreetype6-dev \
+      nano \
+      net-tools \
+      procps \
+      tar \
+      tini \
+      zip unzip \
+# iconv, mbstring and pdo_sqlite are omitted as they are already installed
+    && PHP_EXTENSIONS=" \
+      amqp \
+      bcmath \
+      bz2 \
+      calendar \
+      event \
+      exif \
+      gd \
+      gettext \
+      intl \
+      ldap \
+      memcached \
+      mysqli \
+      opcache \
+      pdo_mysql \
+      pdo_pgsql \
+      pgsql \
+      redis \
+      soap \
+      sockets \
+      xsl \
+      zip \
+    " \
+    && case "$PHP_VERSION" in \
+      5.6.*) PHP_EXTENSIONS="$PHP_EXTENSIONS mcrypt mysql";; \
+      7.0.*|7.1.*) PHP_EXTENSIONS="$PHP_EXTENSIONS mcrypt";; \
+    esac \
+    # Install Imagick from master on PHP >= 8.3, because imagick 3.7.0 broke on latest PHP releases and Imagick maintainers don't care to tag a newer release
+    && if [ $(php -r 'echo PHP_VERSION_ID;') -lt 80300 ]; then \
+      PHP_EXTENSIONS="$PHP_EXTENSIONS imagick"; \
+      else PHP_EXTENSIONS="$PHP_EXTENSIONS https://api.github.com/repos/Imagick/imagick/tarball/28f27044e435a2b203e32675e942eb8de620ee58"; \
+    fi \
+    && install-php-extensions $PHP_EXTENSIONS \
+    && if command -v a2enmod; then a2enmod rewrite; fi
+
+# Install Composer.
+ENV PATH=$PATH:/root/composer/vendor/bin \
+  COMPOSER_ALLOW_SUPERUSER=1 \
+  COMPOSER_HOME=/root/composer
+RUN cd /opt \
+  # Download installer and check for its integrity.
+  && curl -sSL https://getcomposer.org/installer > composer-setup.php \
+  && curl -sSL https://composer.github.io/installer.sha384sum > composer-setup.sha384sum \
+  && sha384sum --check composer-setup.sha384sum \
+  # Install Composer 2.
+  && php composer-setup.php --install-dir=/usr/local/bin --filename=composer --2 \
+  # Remove installer files.
+  && rm /opt/composer-setup.php /opt/composer-setup.sha384sum
 
 RUN docker-php-source extract
 RUN docker-php-ext-install pdo_mysql zip exif pcntl gd
@@ -17,7 +84,17 @@ RUN docker-php-ext-install mysqli && docker-php-ext-enable mysqli
 RUN docker-php-ext-install gettext && docker-php-ext-enable gettext
 RUN docker-php-ext-install sockets && docker-php-ext-enable sockets
 
+RUN mkdir -p /opt && chmod 777 /opt
+WORKDIR /opt
+RUN git clone https://github.com/chillerlan/php-qrcode.git \
+        && chmod -R 777 ./php-qrcode
+RUN cp ./php-qrcode/composer.json /var/www/html/composer.json
+RUN mkdir -p /var/www/html/test && chmod 777 /var/www/html/test
+RUN cp ./php-qrcode/examples/image.php /var/www/html/test/image.php
+RUN cp -R ./php-qrcode/src /var/www/html/
+
 WORKDIR /var/www/html
+RUN composer update
 COPY ./src ./
 RUN chmod 755 *;
 EXPOSE 80

src/forms/qrcode_options.php

@@ -45,6 +45,7 @@
                     <option value="800">800</option>
                     <option value="900">900</option>
                     <option value="1000">1000</option>
+                    <option value="2000">2000</option>
                 </select>
             </div>
         </div>
@@ -75,6 +76,7 @@
                     <option value="jpeg">JPEG</option>
                     <option value="jpg">JPG</option>
                     <option value="svg">SVG</option>
+                    <option value="svgbw">SVG (BW)</option>
                     <option value="eps">EPS</option>
                 </select>
     </div>
@@ -107,4 +109,4 @@
 <?php } else { ?>
     <input type="hidden" name="id_owner" value="<?php echo $_SESSION["user_id"];?>"/>
 <?php } ?>
-    <br>
+    <br>

src/forms/table_static.php

@@ -58,7 +58,7 @@
                 </td>
                 <td><?php echo htmlspecialchars($row['filename']); ?></td>
                 <td><?php echo htmlspecialchars($row['type']); ?></td>
-                <td><?php echo $row['content']; ?></td>
+                <td><?php echo htmlspecialchars_decode($row['content']); ?></td>
                 <td>
                     <?php echo '<img src="'.SAVED_QRCODE_FOLDER.htmlspecialchars($row['qrcode']).'" width="100" height="100">'; ?>
                 </td>

src/lib/Qrcode/Qrcode.php

@@ -1,5 +1,19 @@
 <?php
 require_once 'config/config.php';
+use chillerlan\QRCode\Common\EccLevel;
+use chillerlan\QRCode\QRCode as QRCodeEx;
+use chillerlan\QRCode\QROptions;
+use chillerlan\QRCode\Data\QRMatrix;
+use chillerlan\QRCode\Output\QRImagick;
+use chillerlan\QRCode\Output\QRGdImagePNG;
+use chillerlan\QRCode\Output\QRGdImageJPEG;
+use chillerlan\QRCode\Output\QREps;
+use chillerlan\QRCode\Output\QRMarkupSVG;
+use chillerlan\QRCode\Output\QRCodeOutputException;
+use chillerlan\QRCode\Output\QROutputInterface;
+use chillerlan\Settings\SettingsContainerInterface;
+
+require_once __DIR__.'/../../vendor/autoload.php';
 
 class Qrcode {
     private string $table;
@@ -53,7 +67,7 @@ class Qrcode {
       
         $size = 100;
         if (isset($input_data['size']))
-            $size = min(max((int)$input_data['size'], 100), 1000);
+            $size = min(max((int)$input_data['size'], 100), 2000);
 
         //character # deleted
         $foreground = substr($input_data['foreground'], 1);
@@ -79,28 +93,207 @@ class Qrcode {
     public function addQrcode($input_data, $data_to_db, $data_to_qrcode) {
         $options = $this->setOptions($input_data);
 
-        if(!file_exists(SAVED_QRCODE_DIRECTORY.$data_to_db['filename'].'.'.$data_to_db['format'])){
-            $url =
-                'https://api.qrserver.com/v1/create-qr-code/?data='.
-                $data_to_qrcode.
-                '&amp;&size='.$options['size'].'x'.$options['size'].
-                '&ecc='.$options['errorCorrectionLevel'].
-                '&margin=0&color='.$options['foreground'].
-                '&bgcolor='.$options['background'].
-                '&qzone=2'.
-                '&format='.$data_to_db['format'];
+        $outputInterface = QRGdImagePNG::class;
+        $imageFormat = strtolower($data_to_db['format']);
+        $fileExt = $imageFormat;
+        $forceBlackWhite = false;
 
-            $content = file_get_contents($url);
-            
-            $filename = SAVED_QRCODE_DIRECTORY.$data_to_db['filename'].'.'.$data_to_db['format'];
-        
-            try{
-                file_put_contents($filename, $content);
+
+         switch ($imageFormat)
+         {
+             case 'png':
+                 $outputInterface = QRGdImagePNG::class;
+                 $imageFormat = 'png';
+                 break;
+             case 'gif':
+                 $outputInterface = QRImagick::class;
+                 $imageFormat = 'gif';
+                 break;
+             case 'jpg':
+                 $outputInterface = QRImagick::class;
+                 $imageFormat = 'jpg';
+                 break;
+             case 'jpeg':
+                 $outputInterface = QRImagick::class;
+                 $imageFormat = 'jpeg';
+                 break;
+             case 'svg':
+                 # $outputInterface = QRImagick::class;
+                 $outputInterface = QRMarkupSVG::class;
+                 $imageFormat = 'svg';
+                 break;
+             case 'svgbw':
+                 $outputInterface = QRMarkupSVG::class;
+                 $imageFormat = 'svg';
+                 $fileExt = 'svg';
+                 $forceBlackWhite = true;
+                 $data_to_db['format'] = $fileExt;
+                 $data_to_db['qrcode'] = str_replace('.svgbw', '.svg', $data_to_db['qrcode']);
+                 break;
+             case 'eps':
+                 $outputInterface = QREps::class;
+                 $imageFormat = 'eps';
+                 break;
+         }
+
+
+        if(!file_exists(SAVED_QRCODE_DIRECTORY.$data_to_db['filename'].'.' . $fileExt)){
+            $eccLevel = constant(EccLevel::class.'::'.strtoupper($options['errorCorrectionLevel']));
+
+            $qroptions                       = new QROptions;
+            $qroptions->outputInterface      = $outputInterface;
+            $qroptions->outputBase64         = false;
+            $qroptions->eccLevel             = $eccLevel;
+            $qroptions->quietzoneSize        = 2;
+
+            $moduleValues = [
+                // finder
+                QRMatrix::M_FINDER_DARK    => $options['foreground'],
+                QRMatrix::M_FINDER_DOT     => $options['foreground'],
+                QRMatrix::M_FINDER         => $options['background'],
+                // alignment
+                QRMatrix::M_ALIGNMENT_DARK => $options['foreground'],
+                QRMatrix::M_ALIGNMENT      => $options['background'],
+                // timing
+                QRMatrix::M_TIMING_DARK    => $options['foreground'],
+                QRMatrix::M_TIMING         => $options['background'],
+                // format
+                QRMatrix::M_FORMAT_DARK    => $options['foreground'],
+                QRMatrix::M_FORMAT         => $options['background'],
+                // version
+                QRMatrix::M_VERSION_DARK   => $options['foreground'],
+                QRMatrix::M_VERSION        => $options['background'],
+                // data
+                QRMatrix::M_DATA_DARK      => $options['foreground'],
+                QRMatrix::M_DATA           => $options['background'],
+                // darkmodule
+                QRMatrix::M_DARKMODULE     => $options['foreground'],
+                // separator
+                QRMatrix::M_SEPARATOR      => $options['background'],
+                // quietzone
+                QRMatrix::M_QUIETZONE      => $options['background'],
+            ];
+
+            if(in_array($data_to_db['format'], ['png', 'jpg', 'gif'], true))
+            {
+                $moduleValues = array_map(function($v)
+                {
+                    if(preg_match('/[a-f\d]{6}/i', $v) === 1)
+                    {
+                        return array_map('hexdec', str_split($v, 2));
+                    }
+
+                    return null;
+                }, $moduleValues);
+
+                $qroptions->moduleValues = $moduleValues;
             }
-            catch(Exception $e){
+            else
+            {
+                $moduleValues = array_map(function($v)
+                {
+                    if(preg_match('/[a-f\d]{6}/i', $v) === 1)
+                    {
+                        return '#' . $v ;
+                    }
+
+                    return null;
+                }, $moduleValues);
+
+                $qroptions->moduleValues = $moduleValues;
+            }
+
+            if ($outputInterface === QRMarkupSVG::class)
+            {
+                $qroptions->version              = 7;
+                // if set to false, the light modules won't be rendered
+                $qroptions->drawLightModules     = true;
+                $qroptions->svgUseFillAttributes = false;
+                // draw the modules as circles isntead of squares
+                $qroptions->drawCircularModules  = true;
+                $qroptions->circleRadius         = 0.4;
+                // connect paths
+                $qroptions->connectPaths         = true;
+                // keep modules of these types as square
+                $qroptions->keepAsSquare = [
+                    QRMatrix::M_FINDER_DARK,
+                    QRMatrix::M_FINDER_DOT,
+                    QRMatrix::M_ALIGNMENT_DARK,
+                ];
+                
+                if($forceBlackWhite)
+                {
+                    $qroptions->drawLightModules     = false;
+                    $qroptions->drawCircularModules  = false;
+                    // https://developer.mozilla.org/en-US/docs/Web/SVG/Element/linearGradient
+                    $qroptions->svgDefs = '
+                        <linearGradient id="rainbow" x1="1" y2="1">
+                            <stop stop-color="#' . $options['foreground'] . '" offset="0"/>
+                            <stop stop-color="#' . $options['foreground'] . '" offset="1"/>
+                        </linearGradient>
+                        <style><![CDATA[
+                            .dark{fill: url(#rainbow);}
+                            .light{fill: #eee;}
+                        ]]></style>';
+                }
+                else
+                {
+                  // https://developer.mozilla.org/en-US/docs/Web/SVG/Element/linearGradient
+                    $qroptions->svgDefs             = '
+                        <linearGradient id="rainbow" x1="1" y2="1">
+                            <stop stop-color="#e2453c" offset="0"/>
+                            <stop stop-color="#e07e39" offset="0.2"/>
+                            <stop stop-color="#e5d667" offset="0.4"/>
+                            <stop stop-color="#51b95b" offset="0.6"/>
+                            <stop stop-color="#1e72b7" offset="0.8"/>
+                            <stop stop-color="#6f5ba7" offset="1"/>
+                        </linearGradient>
+                        <style><![CDATA[
+                            .dark{fill: url(#rainbow);}
+                            .light{fill: #eee;}
+                        ]]></style>';
+                }
+            }
+            else
+            {
+                $qroptions->version         = -1;
+                $qroptions->scale           = 20;
+                $qroptions->quality         = 83;
+            }
+
+            if ($outputInterface === QRImagick::class)
+            {
+                $qroptions->imagickFormat       = $imageFormat;
+                $qroptions->returnResource = true;
+                $imagick = (new QRCodeEx($qroptions))->render(urldecode($data_to_qrcode));
+                $imagick->scaleImage($options['size'], $options['size'], true);
+                $content = $imagick->getImageBlob();
+                $imagick->destroy();
+            }
+            else
+            {
+                $content = (new QRCodeEx($qroptions))->render(urldecode($data_to_qrcode));
+            }
+
+            $filename = SAVED_QRCODE_DIRECTORY.$data_to_db['filename'].'.' . $fileExt;
+
+            try
+            {
+                file_put_contents($filename, $content);
+                if ($outputInterface !== QRImagick::class &&
+                    $outputInterface !== QRMarkupSVG::class)
+                {
+                    $imagick = new \Imagick(realpath($filename));
+                    $imagick->resizeImage($options['size'], $options['size'], imagick::FILTER_LANCZOS, 1, false);
+                    $imagick->writeImage($filename);
+                    $imagick->destroy();
+                }
+            }
+            catch(Exception $e)
+            {
                 $this->failure($e->getMessage());
             }
-            
+
             // If you want you can customi<e qr code with logo
             //$this->addLogo($data_to_db['qrcode'], $options['optionlogo']);