function gdversion($full = false) {
        static $gd_version = null;
        static $gd_full_version = null;
        if ($gd_version === null) {
            if ($this->function_enabled('gd_info')) {
                $gd = gd_info();
                $gd = $gd["GD Version"];
                $regex = "/([\d\.]+)/i";
            } else {
                ob_start();
                phpinfo(8);
                $gd = ob_get_contents();
                ob_end_clean();
                $regex = "/\bgd\s+version\b[^\d\n\r]+?([\d\.]+)/i";
            }
            if (preg_match($regex, $gd, $m)) {
                $gd_full_version = (string) $m[1];
                $gd_version = (float) $m[1];
            } else {
                $gd_full_version = 'none';
                $gd_version = 0;
            }
        }
        if ($full) {
            return $gd_full_version;
        } else {
            return $gd_version;
        }
    }