html = $html; } /** * Run the conversion. */ public function convert(): string { $converter = new HtmlConverter($this->getConverterEnvironment()); $html = $this->prepareHtml($this->html); return $converter->convert($html); } /** * Run any pre-processing to the HTML to clean it up manually before conversion. */ protected function prepareHtml(string $html): string { // Carriage returns can cause whitespace issues in output $html = str_replace("\r\n", "\n", $html); // Attributes on the pre tag can cause issues with conversion return preg_replace('/
/', '
', $html);
    }

    /**
     * Get the HTML to Markdown customized environment.
     * Extends the default provided environment with some BookStack specific tweaks.
     */
    protected function getConverterEnvironment(): Environment
    {
        $environment = new Environment([
            'header_style'            => 'atx', // Set to 'atx' to output H1 and H2 headers as # Header1 and ## Header2
            'suppress_errors'         => true, // Set to false to show warnings when loading malformed HTML
            'strip_tags'              => false, // Set to true to strip tags that don't have markdown equivalents. N.B. Strips tags, not their content. Useful to clean MS Word HTML output.
            'strip_placeholder_links' => false, // Set to true to remove  that doesn't have href.
            'bold_style'              => '**', // DEPRECATED: Set to '__' if you prefer the underlined style
            'italic_style'            => '*', // DEPRECATED: Set to '_' if you prefer the underlined style
            'remove_nodes'            => '', // space-separated list of dom nodes that should be removed. example: 'meta style script'
            'hard_break'              => false, // Set to true to turn 
into `\n` instead of ` \n` 'list_item_style' => '-', // Set the default character for each
  • in a
      . Can be '-', '*', or '+' 'preserve_comments' => false, // Set to true to preserve comments, or set to an array of strings to preserve specific comments 'use_autolinks' => false, // Set to true to use simple link syntax if possible. Will always use []() if set to false 'table_pipe_escape' => '\|', // Replacement string for pipe characters inside markdown table cells 'table_caption_side' => 'top', // Set to 'top' or 'bottom' to show content before or after table, null to suppress ]); $environment->addConverter(new BlockquoteConverter()); $environment->addConverter(new CodeConverter()); $environment->addConverter(new CommentConverter()); $environment->addConverter(new DivConverter()); $environment->addConverter(new EmphasisConverter()); $environment->addConverter(new HardBreakConverter()); $environment->addConverter(new HeaderConverter()); $environment->addConverter(new HorizontalRuleConverter()); $environment->addConverter(new ImageConverter()); $environment->addConverter(new LinkConverter()); $environment->addConverter(new ListBlockConverter()); $environment->addConverter(new ListItemConverter()); $environment->addConverter(new CustomParagraphConverter()); $environment->addConverter(new PreformattedConverter()); $environment->addConverter(new TextConverter()); $environment->addConverter(new CheckboxConverter()); return $environment; } }