public static function image($src, $alt = '', $options = [])
    {
        $image_tag_tpl = '<img src="%s" alt="%s"%s />';
        $cdnHost = Lb::app()->getCdnHost();
        if ($cdnHost) {
            if (!ValidationHelper::isUrl($src)) {
                $src = $cdnHost . $src;
            } else {
                $src = preg_replace('/^(http|https):\/\/.+?\//i', $cdnHost . '/', $src);
            }
        }
        return sprintf($image_tag_tpl, $src, $alt, self::assembleTagOptions($options));
    }