我遇到了mod_rewrite的问题。我有一个基本的php网站，其中所有文件都有.php扩展名。
我想要发生的是：
www.site.com/file 和www.site.com/file /
都提供www.site.com/file.php，但没有显示扩展名（因此URL栏显示为www.site.com/file）
如果有人在www.site.com/file.php中输入，则会重定向到www.site.com/file
我的.htaccess代码如下：
Options +FollowSymLinks
RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} ^(.+)/$
RewriteRule ^([^/]+)/$ /$1 [R=301,L]
RewriteCond %{THE_REQUEST} ^(.+)\.php([#?][^\ ]*)?\ HTTP/
RewriteRule ^(.+)\.php$ $1 [R=301,L]
RewriteRule ^([^/.]+)$ $1.php [L]
# Rules For file inside subfolders like
# /folder/myfile --> /folder/myfile.php
# and
# /folder/myfile/ --> /folder/myfile
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.+)/([^/]+)/$ /$1/$2 [R=301,L]
RewriteRule ^(.+)/([^/.]+)$ $1/$2.php [L]
前两个（/ file和/ file / serving file.php）工作正常，但如果我输入www.site.com/file.php，浏览器会重定向到：
http://www.site.com/home/siteuser/public_html/file
并发出404错误
重写日志显示以下内容（loglevel 2）：
[08/Jan/2013:17:35:33 +0000] [www.mysite.com/sid#b970c168][rid#b9914e08/initial] (2) [perdir /home/mysite.com/public_html/] rewrite 'about-us.php' -> 'about-us'
[08/Jan/2013:17:35:33 +0000] [www.mysite.com/sid#b970c168][rid#b9914e08/initial] (2) [perdir /home/mysite.com/public_html/] explicitly forcing redirect with http://www.mysite.com/home/mysite.com/public_html/about-us
[08/Jan/2013:17:35:33 +0000] [www.mysite.com/sid#b970c168][rid#b9914e08/initial] (1) [perdir /home/mysite.com/public_html/] escaping http://www.mysite.com/home/mysite.com/public_html/about-us for redirect
[08/Jan/2013:17:35:33 +0000] [www.mysite.com/sid#b970c168][rid#b9914e08/initial] (1) [perdir /home/mysite.com/public_html/] redirect to http://www.mysite.com/home/mysite.com/public_html/about-us [REDIRECT/301]
[08/Jan/2013:17:35:33 +0000] [www.mysite.com/sid#b970c168][rid#b9914e08/initial] (2) [perdir /home/mysite.com/public_html/] rewrite 'home/mysite.com/public_html/about-us' -> 'home/mysite.com/public_html/about-us.php'
[08/Jan/2013:17:35:33 +0000] [www.mysite.com/sid#b970c168][rid#b9914e08/initial] (2) [perdir /home/mysite.com/public_html/] strip document_root prefix: /home/mysite.com/public_html/home/mysite.com/public_html/about-us.php -> /home/mysite.com/public_html/about-us.php
[08/Jan/2013:17:35:33 +0000] [www.mysite.com/sid#b970c168][rid#b9914e08/initial] (1) [perdir /home/mysite.com/public_html/] internal redirect with /home/mysite.com/public_html/about-us.php [INTERNAL REDIRECT]
[08/Jan/2013:17:35:33 +0000] [www.mysite.com/sid#b970c168][rid#b991e190/initial/redir#1] (1) [perdir /home/mysite.com/public_html/] pass through /home/mysite.com/public_html/home
[08/Jan/2013:17:35:34 +0000] [www.mysite.com/sid#b970c168][rid#b9914e08/initial] (1) [perdir /home/mysite.com/public_html/] pass through /home/mysite.com/public_html/favicon.ico
如何阻止它重定向到文件路径，并将其重定向到www.site.com/file？