URLHelper: fix E_DEPRECATED error related to idn_to_ascii()

classes/urlhelper.php

@@ -67,9 +67,13 @@ class UrlHelper {
 		//convert IDNA hostname to punycode if possible
 		if (function_exists("idn_to_ascii")) {
 			if (mb_detect_encoding($tokens['host']) != 'ASCII') {
+				if (defined('IDNA_NONTRANSITIONAL_TO_ASCII') && defined('INTL_IDNA_VARIANT_UTS46')) {
+					$tokens['host'] = idn_to_ascii($tokens['host'], IDNA_NONTRANSITIONAL_TO_ASCII, INTL_IDNA_VARIANT_UTS46);
+				} else {
 					$tokens['host'] = idn_to_ascii($tokens['host']);
 				}
 			}
+		}
 
 		// separate set of tokens with urlencoded 'path' because filter_var() rightfully fails on non-latin characters
 		// (used for validation only, we actually request the original URL, in case of urlencode breaking it)