Typecho 非插件实现路由功能

function themeInit($archive)
{
    if ($archive->is('archive', 404))
    {
        $path_info = trim($archive->request->getPathinfo(), '/');
        if ($path_info == 'i/redirect')
        {
            $url = urldecode($archive->request->url);
            $archive->response->redirect($url);
            exit;
        }
    }
}