Engine::fillHtmlTemplate

static function fillHtmlTemplate($htmlTemplate, $content, $encoding = null)
{
	$instance = static::create()->setEncoding($encoding)->setHtml($htmlTemplate)->setContent($content);

	if($instance->fill())
	{
		return $instance->getHtml() ?: $htmlTemplate;
	}
	else
	{
		return $htmlTemplate;
	}
}