public function youtube($url, $width = 400, $height = 250, $theme = 'dark')
    {
        if (!empty($url) && intval($width) && intval($height) && !empty($theme)) {
            preg_match('/(?<=v(\=|\/))([-a-zA-Z0-9_]+)|(?<=youtu\.be\/)([-a-zA-Z0-9_]+)/', $url, $v);

            return "<iframe src=\"https://www.youtube.com/embed/{$v[0]}?theme={$theme}&amp;iv_load_policy=3&amp;wmode=transparent\"
                    allowfullscreen=\"\" frameborder=\"0\" width=\"{$width}\" height=\"{$height}\" ></iframe>
            ";
        }
        return false;
    }