为什么mod_rewrite的重写两​​次？ [英] Why would mod_rewrite rewrite twice?

问题描述

我最近才发现了URL重写的，所以我'已经仍然有很多东西需要学习。

I only recently found out about URL rewriting, so I've still got a lot to learn.

虽然继简易现代重写教程，他们的例子之一的结果实在是困惑我。

While following the Easy Mod Rewrite tutorial, the results of one of their examples is really confusing me.

RewriteBase /
RewriteRule (.*) index.php?page=$1 [QSA,L]

重写 /家居 为 /index.php?page=index.php&page=home

Rewrites /home as /index.php?page=index.php&page=home.

我想重复的可能已经引起了我的主机的CONFIGS的东西，但一个干净的安装的 XAMPP 不一样的。

I thought the duplicates might have had been caused by something in my host's configs, but a clean install of XAMPP does the same.

因此​​，没有人知道为什么这似乎解析两次吗？

So, does anyone know why this seems to parse twice?

和，对我来说这似乎是，如果它要做到这一点，那将是一个无限循环 - 为什么它停止在2个周期

And, to me this seems like, if it's going to do this, it would be an infinite loop -- why does it stop at 2 cycles?

推荐答案

=htt​​p://web.archive.org/web/20090302114812/http://easymodrewrite.com/notes-最后一个相对=nofollow>此页面，这是你的问题联系在一起教程的一部分：

From Example 1 on this page, which is part of the tutorial linked in your question:

假设。

RewriteRule ^(.*)$ index.php?PAGE=$1 [L,QSA]

  
  

然而，每次你运行的是，无论哪个文件，你的要求，PAGE变量总是含有的index.php。

Yet every time you run that, regardless of which file you request, the PAGE variable always contains "index.php".

为什么呢？你最终会做两重写。首先，你要求的 test.php的。这被改写为的index.php？PAGE = test.php的。第二次请求现在对于的index.php？PAGE =制成test.php的。这仍然是你重写模式相匹配，并且又被改写为的index.php？PAGE =的index.php

Why? You will end up doing two rewrites. Firstly, you request test.php. This gets rewritten to index.php?PAGE=test.php. A second request is now made for index.php?PAGE=test.php. This still matches your rewrite pattern, and in turn gets rewritten to index.php?PAGE=index.php.

一个解决办法是增加来检查，如果该文件已的index.php一个RewriteCond指令。一个更好的解决方案，也可以让你保持图像和CSS文件在同一目录下是使用检查文件是否存在，使用-f一个RewriteCond指令。

One solution would be to add a RewriteCond that checks if the file is already "index.php". A better solution that also allows you to keep images and CSS files in the same directory is to use a RewriteCond that checks if the file exists, using -f.

¹ 的链接是互联网档案馆，因为本教程的网站显示为脱机

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¹the link is to the Internet Archive, since the tutorial website appears to be offline

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