public static function stripTags(FilterInfo $info, $s)
{
if (!in_array($info->contentType, [NULL, 'html', 'xhtml', 'htmlAttr', 'xhtmlAttr', 'xml', 'xmlAttr'], TRUE)) {
trigger_error("Filter |stripTags used with incompatible type " . strtoupper($info->contentType), E_USER_WARNING);
}
return strip_tags($s);
}