function common_canonical_tag($tag)
{
+ // only alphanum
+ $tag = preg_replace('/[^\pL\pN]/u', '', $tag);
$tag = mb_convert_case($tag, MB_CASE_LOWER, "UTF-8");
- return str_replace(array('-', '_', '.'), '', $tag);
+ $tag = substr($tag, 0, 64);
+ return $tag;
}
function common_valid_profile_tag($str)