rcube_sieve_script::_parse_charset PHP Method

    private function _parse_charset($content)
    {
        $charset = RCUBE_CHARSET;
        $content = trim($content);
        if (preg_match('/^:mime\\s+text:(.*)\\.$/sm', $content, $matches)) {
            $parts = preg_split("/\r?\n/", $matches[1], 4);
            $charset = trim(substr($parts[1], stripos($parts[1], "charset=") + 8));
        }
        return $charset;
    }