program/include/rcube_charset.php
@@ -181,6 +181,12 @@ $to = empty($to) ? strtoupper(RCMAIL_CHARSET) : self::parse_charset($to); $from = self::parse_charset($from); // It is a common case when UTF-16 charset is used with US-ASCII content (#1488654) // In that case we can just skip the conversion (use UTF-8) if ($from == 'UTF-16' && !preg_match('/[^\x00-\x7F]/', $str)) { $from = 'UTF-8'; } if ($from == $to || empty($str) || empty($from)) { return $str; }