多语言存数据库
http://blog.se126.com/archives/1005
symfony事件
http://wiki.jikexueyuan.com/project/symfony-cookbook/before-after-filters.html
symfony多域名
http://symfony.com/doc/current/book/routing.html#adding-a-host-requirement
原文：http://www.cnblogs.com/webskill/p/5539961.html