Adjusted parser to render paragraphs which only contain a single image without the paragraph. So instead <p><img ...></p> it just renders <img ...>

gistfile1.php

<?php

/**
 * Adjusted parser to render paragraphs which only contain a single image without the paragraph.
 *
 * So instead
 * <p><img ...></p>
 *
 * it just renders
 * <img ...>
 */
class Parser extends Parsedown
{
    /**
     * The regex which matches an markdown image definition
     *
     * @var string
     */
    private $markdownImage = "~^!\[.*?\]\(.*?\)$~";



    /**
     * {@inheritdoc}
     */
    protected function paragraph($Line)
    {
        if (1 === preg_match($this->markdownImage, $Line["text"]))
        {
            return $this->inlineImage($Line['text']);
        }

        return parent::paragraph($Line);
    }
}