Apache 的 mod_rewrite 和 %{REQUEST_URI} 问题
假设我们有以下 PHP 页面“index.php”：
<?
if (!isset($_GET['req'])) $_GET['req'] = "null";
echo $_SERVER['REQUEST_URI'] . "<br>" . $_GET['req'];
?>
和以下“.htaccess”文件：
RewriteRule ^2.php$ index.php?req=%{REQUEST_URI}
RewriteRule ^1.php$ 2.php
现在，让我们访问“index.php”。 我们得到这个：
/index.php
null
那很酷。 让我们访问“2.php”。 我们得到这个：
/2.php
/2.php
这也很酷。 但现在让我们看一下“1.php”：
/1.php
/2.php
所以......我们请求“1.php”，它默默地重定向到“2.php”，后者默默地重定向到“index.php？req=％{REQUEST_URI}” ”，但这里的“%{REQUEST_URI}”似乎是“2.php”（我们在第一次重定向之后寻找的页面），而 $_SERVER['REQUEST_URI'] 是“ 1.php”（原始请求）。
这些变量不应该相等吗？ 今天这让我很头疼，因为我试图仅根据原始请求进行重定向。 我可以在“.htaccess”中使用任何变量，即使在重定向后也能告诉我原始请求吗？
预先感谢，我希望我已经说清楚了。 这是我在这里的第一篇文章:)
suppose we have the following PHP page "index.php":
<?
if (!isset($_GET['req'])) $_GET['req'] = "null";
echo $_SERVER['REQUEST_URI'] . "<br>" . $_GET['req'];
?>
and the following ".htaccess" file:
RewriteRule ^2.php$ index.php?req=%{REQUEST_URI}
RewriteRule ^1.php$ 2.php
Now, let's access "index.php". We get this:
/index.php
null
That's cool. Let's access "2.php". We get this:
/2.php
/2.php
That's cool too. But now let's have a look at "1.php":
/1.php
/2.php
So... we ask for "1.php", it silently redirects to "2.php" which silently redirects to "index.php?req=%{REQUEST_URI}", but here the "%{REQUEST_URI}" seems to be "2.php" (the page we're looking for after the first redirection) and the $_SERVER['REQUEST_URI'] is "1.php" (the original request).
Shouldn't these variables be equal? This gave me a lot of headaches today as I was trying to do a redirection based only on the original request. Is there any variable I can use in ".htaccess" that will tell me the original request even after a redirection?
Thanks in advance and I hope I've made myself clear. It's my first post here :)
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我不确定它是否能满足您的需求，但请尝试先查看
REDIRECT_REQUEST_URI，如果不存在，则再查看REQUEST_URI。 您在对 Gumbo 的回答的评论中提到，您真正要查找的是原始 URI； Apache 尝试使用服务器变量的REDIRECT_*版本来实现此类功能。I'm not sure whether it will meet your needs, but try looking at
REDIRECT_REQUEST_URIfirst, then if it's not there,REQUEST_URI. You mention in your comment to Gumbo's answer that what you're truly looking for is the original URI;REDIRECT_*versions of server variables are how Apache tries to make that sort of thing available.只需更改规则的顺序即可：
或者仅使用一条规则：
Just change the order of the rules and it works:
Or use just one rule:
好吧，我想我解决了问题。 我使用了 %{THE_REQUEST} 变量，它基本上包含这样的内容：“GET /123.php HTTP/1.1”。 即使重定向后它仍然保持不变。 感谢大家的帮助！ :)
Well I guess I solved the problem. I used the %{THE_REQUEST} variable which basically contains something like this: "GET /123.php HTTP/1.1". It remains the same even after a redirection. Thanks everyone for your help! :)