mod_rewrite:此RewriteRule的作用是什么? [英] mod_rewrite: what does this RewriteRule do?

问题描述

考虑到这些条件(我知道它们的意思/作用):

Given these conditions (I know what they mean/do):

RewriteCond %{REQUEST_FILENAME} -s [OR]
RewriteCond %{REQUEST_FILENAME} -l [OR]
RewriteCond %{REQUEST_FILENAME} -d 

第一规则有什么作用?那个孤独的破折号是做什么用的?

What does the first rule do? What is that lonely dash for?

RewriteRule ^.*$ - [NC,L]
RewriteRule ^.*$ /index.php [NC,L]

我已经将它与Zend Framework结合使用了一段时间了，但是我从来没有真正了解到第一个规则的确切作用.

I've been using this for quite some time now in combination with the Zend Framework, but I never really got what the first rule does exactly.

推荐答案

RewriteCond指令仅描述了 RewriteRule指令.因此，RewriteCond必须始终与RewriteRule关联.

The RewriteCond directive just describes an additional condition for a RewriteRule directive. So RewriteCond must always be associated with a RewriteRule.

在您的情况下，三个RewriteCond可能属于第一个RewriteRule，如下所示:

In your case the three RewriteCond probably belong to the first RewriteRule like this:

RewriteCond %{REQUEST_FILENAME} -s [OR]
RewriteCond %{REQUEST_FILENAME} -l [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^.*$ - [NC,L]

如果RewriteRule的模式与当前请求URL(之前剥离的每个目录路径)和匹配，则应用此规则.

Now this rule is applied if the pattern of the RewriteRule matches the current request URL (per-directory path stripped before) and if the condition is fulfilled.

在这种情况下，仅当将请求URL映射到文件系统时，该条件与文件大小大于0的现有文件(-s)或符号链接(-l)或目录(-d).因此，您的规则将应用于可以映射到文件系统中现有内容的任何URL(^.*$匹配任何内容).替换-仅表示不更改任何内容. NC (无大小写，不区分大小写，在这种情况下无用)和 L (如果适用，则是最后一条规则)为

In this case the condition is only true if when mapping the request URL to the filesystem it matches either an existing file with the file size greater than 0 (-s), or a symbolic link (-l) or a directory (-d). So your rule will be applied for any URL (^.*$ matches anything) that can be mapped to something existing in your filesystem. The substitution - just means to not change anything. And the NC (no case, case insensitive, useless in this context) and L (last rule if applied) are flags that modify either the pattern, replacement or the execution of the rule.

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