blocks|key|1522654|text|Yep...you可以做到这一点：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1522655|SetEnv+DATABASE_NAME+testing|code-block|syntax|javascript|1522656|然后在PHP中：|1522657|$database+=+$_SERVER["DATABASE_NAME"];|1522658|或|1522659|$database+=+getenv("DATABASE_NAME");|1522660|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

Yep...you can do this:

<pre><code>SetEnv DATABASE_NAME testing
</code></pre>

and then in PHP:

<pre><code>$database = $_SERVER["DATABASE_NAME"];
</code></pre>

or

<pre><code>$database = getenv("DATABASE_NAME");
</code></pre>

blocks|key|1522734|text|您可以设置环境变量并使用PHP检索它。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1522735|在httpd.conf中：|1522736|SetEnv+database+testing|code-block|syntax|javascript|1522737|在你的PHP中：|1522738|if+(getenv('database')+==+'testing')+{|1522739|或|1522740|if+($_SERVER['database']+==+'testing')+{|1522741|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|V|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

You can set an environment variable and retrieve it with PHP.

In httpd.conf:

<pre><code>SetEnv database testing
</code></pre>

In your PHP:

<pre><code>if (getenv('database') == 'testing') {
</code></pre>

or

<pre><code>if ($_SERVER['database'] == 'testing') {
</code></pre>

blocks|key|1737797|text|我不会设置环境变量，因为这在默认脚本输出中也是可见的，比如PhpInfo()；|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1737798|只需在.htaccess中的htdocs文件夹上方使用一个php_value，就可以安全地完成操作:)|1737799|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

I would not set an environment variable, as this is also visible in default script outputs like PhpInfo();

just use a php_value in your .htaccess just above the htdocs folder and you're done and safe :)

blocks|key|1522853|text|.htaccess的问题在于它是代码基础树的一部分。代码基树是VC/SVN的一部分。因此，local/dev中的任何更改都会转移到生产环境中。在httpd.conf中保留环境变量设置可以省去您小心不要意外重写服务器与开发标志的工作。当然，除非您想使用IP地址或主机名，因为这两者都不是可伸缩的方法。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1522854|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

The problem with .htaccess is that it is part of the code base tree. And the code base tree is part of VC/SVN. Hence any change in local/dev gets moved to production. Keeping the env variable setting in httpd.conf saves you the effort of being careful about not accidentally overwriting the server vs dev flag. Unless of course you want to do with IP address or host name, both of which are not scalable approaches.

blocks|key|1522907|text|我也在考虑这种类型的解决方案。我发现的是，在Apache下，你可以在http.conf中使用SetEnv+KeyName+DataValue，在IIS中，你可以使用Fast+CGI设置>>编辑...>>环境变量>>+...并添加KeyName,+DataValue。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1522908|这反过来又允许将PHP设置为DataValue，并根据需要在$var+=+$_SERVER["KeyName"];和Apache下一致地使用它。|1522909|我知道这是一个奇怪的用例。我在工作中使用WAMP，在家里使用MAMP，所以能够以同样的方式工作是很好的。|1522910|entityMap^0|1A|O|36|I|0|E|9|U|R|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@$9|M|A|N|B|C]|$9|O|A|P|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Q|8|@$9|R|A|S|B|C]|$9|T|A|U|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|V|8|@]|D|@]|E|$]]|$1|J|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|K|$]]

I was also looking at this type of solution. What I found is this, under Apache you can use the <code>SetEnv KeyName DataValue</code> in the http.conf and in IIS you can use Fast CGI Settings >> Edit... >> Environment Variables >> ... and add <code>KeyName, DataValue</code>. 

This in turn allows the PHP <code>$var = $_SERVER["KeyName"];</code> to be set to the <code>DataValue</code> and used as needed under both IIS and Apache consistently.

I know this is a strange use case. I use WAMP at work and MAMP at home so it is nice to be able to work the same way.

I'd like to automatically change my database connection settings on a per-vhost basis, so that I don't have to edit any PHP code as it moves from staging to live and yet access different databases. This is on a single dedicated server.

So I was wondering, can I set a PHP variable or constant in httpd.conf as part of the vhost definition that the site can then use to point itself to a testing database automatically?

<pre><code>$database = 'live';
if (some staging environment variable is true) {
 $database = 'testing'; // and not live
}
</code></pre>

If this isn't possible, I guess in this case I can safely examine the hostname I'm running on to tell, but I'd like something a little less fragile

Hope this makes sense

many thanks

Ian

Setting PHP variables in httpd.conf?

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我希望在每个vhost的基础上自动更改我的数据库连接设置，这样我就不必在PHP代码从一个登台移动到另一个活动时编辑任何PHP代码，而不必访问不同的数据库。这是在一台专用服务器上。所以我想知道，我是否可以在httpd.conf中设置一个PHP变量或常量作为vhost定义的一部分，然后站点可以使用它来自动指向测试数据库？$...

问在httpd.conf中设置PHP变量？
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