diff --git a/library/HTMLPurifier/AttrDef/URI/Host.php b/library/HTMLPurifier/AttrDef/URI/Host.php index e54a3344..1beeaa5d 100644 --- a/library/HTMLPurifier/AttrDef/URI/Host.php +++ b/library/HTMLPurifier/AttrDef/URI/Host.php @@ -97,7 +97,11 @@ class HTMLPurifier_AttrDef_URI_Host extends HTMLPurifier_AttrDef // PHP 5.3 and later support this functionality natively if (function_exists('idn_to_ascii')) { - $string = idn_to_ascii($string, IDNA_NONTRANSITIONAL_TO_ASCII, INTL_IDNA_VARIANT_UTS46); + if (defined('IDNA_NONTRANSITIONAL_TO_ASCII') && defined('INTL_IDNA_VARIANT_UTS46')) { + $string = idn_to_ascii($string, IDNA_NONTRANSITIONAL_TO_ASCII, INTL_IDNA_VARIANT_UTS46); + } else { + $string = idn_to_ascii($string); + } // If we have Net_IDNA2 support, we can support IRIs by // punycoding them. (This is the most portable thing to do,