我可以连接在Apache的配置环境变量？ [英] Can I concatenate environment variables in apache config?

问题描述

我在apache配置两个环境变量，我想将它们串联成一个新的环境变量。这可能吗？

I have two environment variables in apache config, I want to concatenate them into one new environment variable. Is this possible?

我知道这是不行的，但它表明了诸如此类的事情后，我：

I realise this doesn't work, but it demonstrates the sort of thing I'm after:

SetEnv one foo
SetEnv two bar
SetEnv three one+two

...然后'三'将具有值foobar的

...and then 'three' would have the value "foobar"

推荐答案

使用的 mod_rewrite的定期EX pression有两个通配符反向引用来访问环境变量和连接字符串：

Use a mod_rewrite regular expression with two wildcard backreferences to access the environment variables and concatenate the strings:

#This will be true for any user agent
RewriteCond  %{HTTP_USER_AGENT}  ^.*

#Replace / with / and set the new environment variable
RewriteRule  /(%{ENV:one})*(%{ENV:two})* / [E=three:$1$2]

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