关于此 htaccess 文件的四个具体问题

Question

#+FollowSymLinks must be enabled for any rules to work, this is a security 
#requirement of the rewrite engine. Normally it's enabled in the root and you 
#shouldn't have to add it, but it doesn't hurt to do so.
Options +FollowSymlinks
#Apache scans all incoming URL requests, checks for matches in our .htaccess file 
#and rewrites those matching URLs to whatever we specify.
#to enable runtime rewriting engine
RewriteEngine On

#this tells mod_rewrite to leave the URL unchanged (the dash part -) and quit 
#other rewwrite processing rules if the requested segment has one of those 
#prefixes (that's what we asking when we use the ^ sign), on the list. If the 
#prefix is in the list, all subsequent Rewrite Rules are skipped.
#So to avoid some files OR directories to be redirected we use:
RewriteRule ^(somefile|somedir|someotherfile) – [L]

1) 在这些之前的 RewriteRule 之前我们不需要一个条件吗？

#this will allow direct linkage to this extensions, regardless the case sensitive.
RewriteCond %{REQUEST_FILENAME} !\.(js|ico|zip|rar|mov|mpeg4|mp4|gif|jpg|png|css|doc|pdf|docx|wmv|mpeg|avi|mpg|flv|ppt|pptx|txt)$ - [NC]

2) [NC] 标志会处理这里的所有大小写变化吗？

#if the request uri has not public...
RewriteCond %{REQUEST_URI} !^/public/.*$
#rewrite to public something...
RewriteRule ^(.*)$ /public/$1

3) 为什么我们的 RewriteRule 上有 $1 而不是 /public/index.php 吗？

#rewrite all requests that start with public, to public/index.php and if that's 
#the case, don't run any other rule.
RewriteRule ^public/.*$ /public/index.php [NC,L]

4) 因为这是最后一条规则，我们可以删除 L 标志吗？

Answer 1

1. 不，任何以 somefile、somedir 或 someotherfile 开头的内容都不会被重写 (-)。 [L] 确保不会处理更多规则（包括此规则）。
2. 是的。
3. 因为 RewriteCond 也可以匹配 /public/otherthing，而不仅仅是 /public/index.php。
4. 不行，没有[L]，会出现死循环，因为重写的URL /public/index.php 匹配 `^public.*$ 。