访问 ：app.xxx.com/a
解析到：app.xxx.com/index.php/app/a
<IfModule mod_rewrite.c> RewriteEngine on RewriteRule http://app.xxx.com http://m.xxx.com RewriteCond %{HTTP_HOST} app.xxx.com RewriteCond %{REQUEST_URI} !^/index\.php RewriteRule ^(.*)$ /index.php/app/$1 </IfModule>
原文：http://www.cnblogs.com/dhsx/p/5265104.html