``` ~~~ /** * TP5二级目录转TP6二级目录. * * @param string $class * * @return string */ function tp5ControllerToTp6Controller($class = '') { $_arr = explode('/', $class); $route = $class; if (count($_arr) >= 3) { $route = ''; foreach ($_arr as $_k => $_v) { $route .= $_v; ($_k == 0) ? $route .= '.' : $route .= '/'; } $route = rtrim($route, '/'); } elseif (count($_arr) == 2) { $route = implode('.', $_arr).'/index'; } return $route; } ~~~ ```