不同的用户权限看到的菜单功能都不同，登录后的初始还原页不配权限，保证每个用户都能看到，常见的做法有，放系统信息，统计信息等

public function get_sys_info() {
    $sys_info['os'] = PHP_OS;
    $sys_info['zlib'] = function_exists('gzclose') ? 'YES' : 'NO'; //zlib
    $sys_info['safe_mode'] = (boolean)ini_get('safe_mode') ? 'YES' : 'NO'; //safe_mode = Off
    $sys_info['timezone'] = function_exists("date_default_timezone_get") ? date_default_timezone_get() : "no_timezone";
    $sys_info['curl'] = function_exists('curl_init') ? 'YES' : 'NO';
    $sys_info['web_server'] = $_SERVER['SERVER_SOFTWARE'];
    $sys_info['php_version'] = phpversion();
    $sys_info['ip'] = gethostbyname($_SERVER['SERVER_NAME']);
    $sys_info['fileupload'] = @ini_get('file_uploads') ? ini_get('upload_max_filesize') : 'unknown';
    $sys_info['max_ex_time'] = @ini_get("max_execution_time") . 's'; //脚本最大执行时间
    $sys_info['set_time_limit'] = function_exists("set_time_limit") ? true : false;
    $sys_info['domain'] = $_SERVER['HTTP_HOST'];
    $sys_info['memory_limit'] = ini_get('memory_limit');
    $sys_info['soft_version'] = '2.0.7'; //系统版本
    $mysqlinfo = Db::query("SELECT VERSION() as version");
    $sys_info['mysql_version'] = $mysqlinfo[0]['version'];
    if (function_exists("gd_info")) {
        $gd = gd_info();
        $sys_info['gdinfo'] = $gd['GD Version'];
    } else {
        $sys_info['gdinfo'] = "未知";
    }
    return $sys_info;
}