League\CommonMark\Converter::convertToHtml PHP Method

    public function convertToHtml($commonMark)
    {
        $documentAST = $this->docParser->parse($commonMark);
        return $this->htmlRenderer->renderBlock($documentAST);
    }

 public function getArticle($uri)
 {
     $environment = Environment::createCommonMarkEnvironment();
     $environment->addExtension(new TableExtension());
     $converter = new Converter(new DocParser($environment), new HtmlRenderer($environment));
     $contents = \Storage::get($uri . '.md');
     preg_match('/^.*$/m', $contents, $matches);
     return view('portal', array('body' => $converter->convertToHtml($contents), 'title' => substr($matches[0], 2)));
 }