Question

好吧，我有一个相当奇怪的问题，我已经坐了一段时间没有成功。我的页面结构大致如下：

<?php
ob_start();
error_reporting(E_ALL);

然后我创建一个包含用户信息的数组：

$USER = array('ID' => md5(uniqid(rand(),1)),
          'referrer' => $_SERVER['HTTP_REFERER'],
          etc.
       );

这将有10个条目左右。然后我检查用户是否已经设置了我的cookie，如果他们没有，我做（在输出任何内容之前，即在<html>标记之前）：

$data = base64_encode(serialize($USER));
setcookie('cookiename', $data, time()+86400*30, '/','mydomain.com',1,1);

到目前为止一切顺利。现在说用户然后导航到我网站上的另一个页面。现在已经设置了cookie，所以如果检查返回true，我会用以下内容读取cookie：

$DUMMY = unserialize(base64_decode($_COOKIE['cookiename']));

所以现在$ DUMMY应该具有先前写入cookie的相同数组结构。真正令人困惑的是，当我尝试访问时：

$uid = $DUMMY['ID'];

我在error_log中收到警告说：

PHP Notice:  Undefined index: ID

这真的很奇怪，因为（1）它只会在cookie存在的情况下读取cookie，如果它存在，它应该有＆＃39; ID＆＃39;首先写入它的元素（我确实用print_r($DUMMY);进行了双重和三重检查，并且所有元素都在那里）。此外，当我尝试使用$uid 我可以时，也就是说，它确实具有它应该具有的值。所以一切似乎都没问题，除了我的error_log文件获得1000条这些PHP警告消息。有什么想法吗？

我在页面页脚的最末端执行ob_end_flush();。感谢。

P.S。：正在发生一些更奇怪的事情。好的测试目的，我添加了一些IP过滤器，所以只有当我访问页面时才加载cookie脚本。它似乎有效，因为数据库中没有进一步的条目。尽管如此，错误消息仍然在error_log文件中消失。我正在提供摘录：

[13-Dec-2017 01:04:34 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:04:35 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:05:06 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:05:07 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:05:38 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:05:39 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:06:10 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:06:11 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:06:42 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:06:43 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:07:14 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:07:15 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:07:46 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:07:47 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:08:18 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:08:20 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:08:50 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:08:51 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:09:22 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:09:23 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:09:54 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:09:55 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:10:26 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:10:27 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:10:58 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:10:59 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:11:30 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:11:31 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:12:03 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:12:03 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:12:35 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:12:35 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:13:07 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:13:07 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:13:39 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:13:39 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:14:11 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:14:11 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:14:43 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:14:43 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:15:15 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:15:15 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:15:47 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:15:47 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:16:19 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:16:19 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:16:51 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:16:51 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:17:23 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:17:23 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:17:55 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:17:55 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:18:27 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51
[13-Dec-2017 01:18:27 Europe/Berlin] PHP Notice:  Undefined index: ID in /home/xxxxxxxx/public_html/include/usertrack.inc.php on line 51

有两件事让我觉得奇怪： 1）为什么我首先看到它们，因为脚本仅包含在我的IP中，并且 2）这些消息有一些奇怪的规律性。每30秒约2次点击。

这是什么？某种黑客攻击？但即使是一些奇怪的DDoS，为什么攻击者会看到cookie脚本呢？我的IP过滤器是：

if ($_SERVER['REMOTE_ADDR'] == 'xxx.xxx.xxx.xxx') { // the x's would be my IP
    require 'include/usertrack.inc.php';
    flush();
}

这对我来说是绝对的谜。

Answer 1

噢，伙计......我心疼。我刚刚解决了

好的，我最近对目录结构进行了一些更改，我正在运行自己的云服务器（使用owncloud）。由于目录结构的变化，owncloud不再找到它应该与之同步的目录。所以基本上，它每30秒就试图联系服务器以找到目录。由于它来自我的机器，owncloud请求确实有我的IP号码所以通过IP过滤器，但由于它无法找到目录，它必须触发一些404或其他东西。

我不确定owncloud会发出什么样的请求，但它必须触发了cookie脚本，甚至可能接受了cookie但可能不允许我的脚本读取cookie或者在设置的时候删除它。无论哪种方式，现在我再次将owncloud指向正确的目录，错误消息就会停止显示，并且error_log是干净的。

男人...我生命中的两天我永远不会回来！

对此感到抱歉。

从cookie

1 个答案: