") !== false)
                return "
[Shortcode Gallery++] Error:
 
                        > Images provided got parsed as code block.

                        > Please check your markdown file and make sure the images aren't indented by tab or more than three spaces.
";

            // remove 
 tags
            $content = preg_replace('(
|
)', '', $content);
            // split up images to arrays of img links
            preg_match_all('||', $content, $images);

            $images_final = [];
            foreach ($images[0] as $image) {
                // get src attribute
                preg_match('|src="(.*?)"|', $image, $links);

                // get alt attribute
                preg_match('|alt="(.*?)"|', $image, $alts);

                // get title attribute - and strip html from it
                // e.g.:    "Title 1
Example 1
More description
Bla bla"
                // becomes: "Title 1 | Example 1 | More description | Bla bla"
                preg_match('/title="(.*?)"/', $image, $desc);
                $title_clean = null;
                if (!empty($desc)) {
                    if (!filter_var($removeTitle, FILTER_VALIDATE_BOOLEAN)) {
                        // replace br tags with " | "
                        $title_clean = preg_replace('/
/', ' | ', html_entity_decode($desc[1]));
                        // strip html
                        $title_clean = strip_tags(html_entity_decode($title_clean));
                        // set as new title
                        $image = preg_replace('/title=".*?"/', "title=\"$title_clean\"", $image);
                    } else {
                        $image = preg_replace('/title=".*?" /', "", $image);
                    }
                } else {
                    $desc[1] = null;
                }

                // combine
                array_push($images_final, [
                    // full
                    "image" => $image,
                    "src" => $links[1],
                    "alt" => $alts[1],
                    "title" => $title_clean,
                    "desc" => $desc[1],
                    ]);
            }

            // a random id for each gallery
            $id = mt_rand();

            // generate inline JS
            $inline_js = $this->twig->processTemplate(
                'partials/gallery-plusplus-inlinejs.js.twig', [
                    'id' => $id,
                    // gallery settings
                    'rowHeight' => $rowHeight,
                    'margins' => $margins,
                    'lastRow' => $lastRow,
                    'captions' => $captions,
                    'border' => $border,
                    // lightbox settings
                    'openEffect' => $openEffect,
                    'closeEffect' => $closeEffect,
                    'slideEffect' => $slideEffect,
                    'closeButton' => $closeButton,
                    'touchNavigation' => $touchNavigation,
                    'touchFollowAxis' => $touchFollowAxis,
                    'keyboardNavigation' => $keyboardNavigation,
                    'closeOnOutsideClick' => $closeOnOutsideClick,
                    'loop' => $loop,
                    'draggable' => $draggable,
                    'descPosition' => $descPosition,
                    'descMoreText' => $descMoreText,
                    'descMoreLength' => $descMoreLength,
                ]
            );

            // give JS and CSS so that they can be cached
            $this->shortcode->addAssets('css', 'plugin://shortcode-gallery-plusplus/vendor/glightbox/glightbox.min.css');
            $this->shortcode->addAssets('css', 'plugin://shortcode-gallery-plusplus/vendor/justified-gallery/justifiedGallery.min.css');
            $this->shortcode->addAssets('js', ['jquery', 101]);
            $this->shortcode->addAssets('js', 'plugin://shortcode-gallery-plusplus/vendor/glightbox/glightbox.min.js');
            $this->shortcode->addAssets('js', 'plugin://shortcode-gallery-plusplus/vendor/justified-gallery/jquery.justifiedGallery.min.js');
            $this->shortcode->addAssets('inlineJs', [ $inline_js, [ 'group' => 'bottom' ] ] );

            return $this->twig->processTemplate(
                'partials/gallery-plusplus.html.twig',
                [
                    'page' => $this->grav['page'], // used for image resizing
                    'id' => $id,
                    // gallery settings
                    'rowHeight' => $rowHeight,
                    'resizeFactor' => $resizeFactor,
                    // lightbox settings
                    'descEnabled' => $descEnabled,
                    // images
                    'images' => $images_final,
                ]
            );
        });
    }

}