HtmlDocument::filterString

protected function filterString($str)
{
	$str = html_entity_decode($str, ENT_QUOTES, $this->getEncoding());
	$str = Encoding::convertEncoding($str, $this->getEncoding(), Context::getCurrent()->getCulture()->getCharset());
	$str = trim($str);
	$str = strip_tags($str);

	return $str;
}