public static function get($key = null, $default = '')
{
if (empty($key)) {
return '';
}
$replace = func_get_args();
$key = strtolower($key);
$val = Cml::doteToArr($key, self::$_content['normal']);
if (is_null($val)) {
return $default;
} else {
$replace[0] = $val;
return call_user_func_array('sprintf', array_values($replace));
}
}