// PHP 5.3 and later support this functionality natively
if (function_exists('idn_to_ascii')) {
- $string = idn_to_ascii($string);
+ $string = idn_to_ascii($string, IDNA_NONTRANSITIONAL_TO_ASCII, INTL_IDNA_VARIANT_UTS46);
// If we have Net_IDNA2 support, we can support IRIs by
// punycoding them. (This is the most portable thing to do,