utils_sanitize_ascii_domain_in_url_str

Checks whether the host name of the url_str requires conversion to ASCII and converts it if needed.

Returns null, when no conversion was required.

Parameters:

url_str

a URL as string

Returns:

converted url_str to ASCII host name, or null, when no conversion was needed. See: hostname_utils_requires_ascii, utils_sanitize_ascii_domain_in_url