php - textarea 偶尔会在 $_POST 中丢失，但 content_length 总是正确的？

Question

在运行相当活跃的站点的服务器上出现了一个奇怪的错误。

• 服务器:Apache/2.2.3 (CentOS)
• PHP:5.2.6
• 电子加速器 0.9.5.3

在使用多部分表单时，偶尔从文本区域发送的数据会在 $_POST 中丢失

我们知道数据已发送，因为 content_length 显示超过 1K 的合理大小

表单中的所有其他输入字段均已正确接收。

它不是特定于浏览器的，并且发生在 IE/Firefox/Chrome 上。

几乎 99% 的时间都有效，每发布一百个帖子平均只有 1 到 2 次失败。

在极少数情况下，我们能够自己重现它，所以我们知道数据正在发送，只是没有被 apache/php 处理

所有这些设置都已经过检查并且是合理的在 php.ini 中:

memory_limit
max_input_time
upload_max_file_size
post_max_filesize

在 httpd.conf 中

LimitRequestBody
TimeOut

很想听听其他想法。我找不到任何已知的 PHP 相关错误。

Answer 1

不确定这是问题所在(不是一个容易猜到的问题 ^^ )，但如果你有 suhoshin安全补丁/扩展，你试过停用它吗？
(我不知道它在 CentOS 上是否默认激活，但考虑到它在 Ubuntu 上，它可能是“不太面向企业的”)

我建议这样做是因为 this bug report ，其中有几个注释，例如:

[30 Oct 2007 11:02am UTC] sbauer at gjl-network dot net

While experiencing this issue, too we found that the cause of this problem was the suhosin patch, wich was - by default - configured to have a max limit for the length of cookie, request, post, get and session vars. E.g. for POST this looks like:

suhosin.post.max_array_depth 100 100 suhosin.post.max_array_index_length 64 64 suhosin.post.max_name_length 64 64 suhosin.post.max_totalname_length
256 256 suhosin.post.max_value_length 65000 65000 suhosin.post.max_vars
200 200

Those derivatives needs to be set to a adequate higher number. E.g. in our case, the problem was, that our POST data was too long (as this seems to be the case for a lot of you here).

So I suggest to check your php.ini or (according to your distribution there often is a suhosin.ini) and correct the above values or set them to 0 to disable it. If those derivatives are not set, default values will be used. You need to check / add: suhosin.post.max_.... suhosin.request.max_... suhosin.get.max_... suhosin.session.max_... suhosin.cookie.max_...

Refer to your phpinfo() where these values should be listed!

和/或:

[13 Nov 2008 4:58pm UTC] keith at tdrnetworks dot com

Regarding the enctype="multipart/form-data" not populating the $_POST vars I found my solution was to disable the Suhosin security module.

Have a go!

还有一条注释说:

[5 Feb 6:49pm UTC] neal dot pressley at yahoo dot com

I was facing the same problem. I had a html form with php scripts in which I was submitting radio buttons or checkboxes. When I post the form, PHP was not finding any post parameters. it was random, some time it was working and some time not. Even I tried with Get, it worked some time and some time not. Then I change ENCTYPE from uppercase to lowercase and it started working prefectly

您的表单/页面 HTML 有效吗？也许，在极少数情况下，不是？

也许这会有所帮助...如果没有，我很想知道这个问题的原因!