UCH1.5首页成了空白框架.

esncy · 发表于 2009-11-11 23:33:02

本帖最后由 esncy 于 2009-11-11 23:35 编辑

问题网站:http://www.90home.comUCH1.5
环境:linux+nginx

一、问题描述：
UCH1.5突然发现不知从什么时候开始,未登陆前的首页,站长推荐,FEED.应用推荐,群组话题,热门日志等等栏目全变在空白了.
因为在电脑设置了自动登陆,出现时间不确定.
配置一直没变过,后台也一直没改过.

调试:
1,因为怀疑被人挂马,把旧的备份文件index.php替换.更新缓存.首页OK了.
再刷新,又空白,怀疑模板文件也有问题.
2,替换模板首页文件.更新缓存.又OK了.
再刷新问题重复,之后才发现原来是每次更新缓存就行.
以为是缓存机制出了问题,去后台把缓存关掉.问题依旧.
最后找到一个朋友,解决.错误暂时是解决了.
问题来了.
按步骤说.

二、问题解决过程：
因为清掉缓存后第一次正常显示，然后就不正常，怀疑与缓存文件有关。故，调试index.php程序，慢慢找到以下代码段：
源代码为：

$caches = data_get('index_cache', 1);
$caches['dateline'] = intval($caches['dateline']);
if($_SCONFIG['networkupdate'] && $_SGLOBAL['timestamp'] - $caches['dateline'] < $_SCONFIG['networkupdate']) {
@$caches['datavalue'] = unserialize($caches['datavalue']);
@extract($caches['datavalue']);
} else {

复制代码

我修改后的代码为（即不通过缓存文件来生成首页，而是直接从数据库中读取资料）：

$caches = data_get('index_cache', 1);
$caches['dateline'] = intval($caches['dateline']);
//if($_SCONFIG['networkupdate'] && $_SGLOBAL['timestamp'] - $caches['dateline'] < $_SCONFIG['networkupdate']) {
if (0){
@$caches['datavalue'] = unserialize($caches['datavalue']);
@extract($caches['datavalue']);
} else {

复制代码

结果首页恢复正常。

三、原因查找及根源怀疑：
我将下面代码：

$caches = data_get('index_cache', 1);
$caches['dateline'] = intval($caches['dateline']);

复制代码

进行修改下（即输出caches变量的值）：

$caches = data_get('index_cache', 1);
$caches['dateline'] = intval($caches['dateline']);
print_r($caches);

复制代码

得到caches的运行结果如最后所示：
结果原来是一个数组，我留意到其中的datavalue关键元素的值，有一个异常点：该值以s:10:"结尾，但我以自己写程序的经验，感觉这可能不是一个正常的结尾。我的意思是：这个数组元素的值实际上，应该是不止这么长的，后面可能还有内容。但实际上这里的数据，有可能不完整。
怀疑根源是：是否因为这个不完整，造成数据无法正常分析到变量中？所以造成一切为空白？

Array
(
[var] => index_cache
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[dateline] => 1257951839
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esncy · 发表于 2009-11-12 11:39:24

玻璃屋女孩,求助呀.

esncy · 发表于 2009-11-12 14:21:54

云天一,求助呀.

云天一 · 发表于 2009-11-13 18:10:50

昨天生病了
楼主的问题解决了吗？

esncy · 发表于 2009-11-14 09:03:08

当天就解决了。上来反映问题，提出疑惑。
希望能解答。

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