demo

    public function demo()
    {
        $name = preg_replace('~[^a-z0-9_-]+~ims', '', trim($_GET['page'] ?: $_GET['id']));
        if ( ! $name) {
            return _404();
        }
        $cls_assets = _class($assets);
        $all = $this->_get_assets();
        if ( ! isset($all[$name])) {
            return _404();
        }
        $content = $all[$name]['content'];
        if (is_callable($content)) {
            $content = $content($cls_assets);
        }
        asset($name);
        if (isset($content['demo'])) {
            $demo = $content['demo'];
            if (is_callable($demo)) {
                $demo = $demo();
            }
            $out[] = $demo;
        }
        $out[] = '<pre><code>' . _prepare_html(var_export($content, true)) . '</code></pre>';
        return implode('<br>' . PHP_EOL, $out);
    }

array (
  'versions' => 
  array (
    '1.1.3' => 
    array (
      'js' => '//cdnjs.cloudflare.com/ajax/libs/ace/1.1.01/ace.js',
    ),
  ),
  'config' => 
  array (
    'no_cache' => true,
  ),
  'info' => 
  array (
    'url' => 'http://ace.c9.io/',
    'name' => 'Ace - The High Performance Code Editor for the Web',
    'desc' => 'Ace is an embeddable code editor written in JavaScript. It matches the features and performance of native editors such as Sublime, Vim and TextMate. 
			It can be easily embedded in any web page and JavaScript application. Ace is maintained as the primary editor for Cloud9 IDE and is the successor of the Mozilla Skywriter (Bespin) project.',
    'git' => 'https://github.com/ajaxorg/ace.git',
  ),
)

demo demo()

demo