泛域名url_rewrite规则参考

当访问http://health.domain.com转向到 http://www.domain.com/category/health。
rewrite rule配置如下：
  RewriteEngine On
  RewriteCond %{HTTP_HOST} ^[a-z0-9\-]+\.domain\.com$
  RewriteRule ^/?$ /%{HTTP_HOST}
  RewriteRule ^/([a-z0-9\-]+)\.domain\.com/?$ /category/$1 [R,L]