mod_重写和网站链接结构

我有一个这样结构的网站

index.php/home.php/profile.php/news.php/photos.php

newsfeed.php -用于新闻文章

photo.php - for photo

也有用户名，用户可以获得他的个人资料的短链接，如

mysite.com/UserName

现在我使用。htaccess中的代码重写用户名 的url

RewriteEngine on
RewriteOptions MaxRedirects=1
RewriteCond %{REQUEST_FILENAME} -f [NC,OR]
RewriteCond %{REQUEST_FILENAME} -d [NC]
RewriteRule .* - [L]
RewriteRule ^([^/]+)/?$ profile.php?u=$1 [L]

现在我想重写我所有的链接是se友好的，像这样

index.php   --> index
home.php    --> home
photos.php  --> photos
videos.php  --> videos
newsfeed.php?id=xx  --> news/xx
photo.php?id=xx     --> photo/xx

知道了吗?

RewriteEngine on
RewriteOptions MaxRedirects=1
RewriteCond %{REQUEST_FILENAME} -f [NC,OR]
RewriteCond %{REQUEST_FILENAME} -d [NC]
RewriteRule .* - [L]
RewriteRule ^users/([^/]+)/?$ profile.php?u=$1 [L]
RewriteRule ^news/([0-9]+)/?$ newsfeed.php?id=$1 [L]
RewriteRule ^photo/([0-9]+)/?$ photo.php?id=$1 [L]
RewriteRule ^videos/?$ videos.php [L]
RewriteRule ^index/?$ index.php [L]
RewriteRule ^home/?$ home.php [L]