我尝试搜索整个www，然后得到一个答案.

I try search to the entire www, then I have an answer..

RewriteEngine On
Options +FollowSymLinks -MultiViews

RewriteRule    ^article/([0-9]+)/?$    detail.php?ca=$1    [NC,L]   
RewriteRule    ^article/([0-9]+)/([A-Za-z0-9-]+)/?$    detail.php?ca=$1&title=$2    [NC,L]  

RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^([^\.]+)$ $1.php [NC,L]