LZ可以GOOGLE下SSO的内容
http://www.phpchina.com/viewnews_1153.html
http://www.oracle.com/technology/global/cn/pub/notes/technote_as_signoff.html
http://www.phpchina.com/viewnews_1153.html
http://www.oracle.com/technology/global/cn/pub/notes/technote_as_signoff.html
session.cookie_domain = "youyou.com"
setcookie(name, value, expire, path, domain);
domain 的值设置为:"youyou.com"
这样,你在每个二级域名都能读取到这个 cookies的值,也就是说每个二级域名下的cookies是共用的;