让 www.example.com 和 example.com 使用相同会话变量的最佳方法? [英] Best way to make www.example.com AND example.com use the same session variables?

问题描述

我正在处理一个网页(我们称之为 example.com)并在 CNAME(别名)下添加了 DNS 记录:

I'm working on a webpage (let's call it example.com) and added the DNS record under CNAME (Alias):

Host Record Points    to  TTL
www  example.com       14400

但是，当我浏览 example.com 时，如果我转到 www.example.com，则不会保留设置的会话变量

However when I navigate through example.com, the session variables that are set are not retained if I go to www.example.com

让 www.example.com 和 example.com 使用相同会话变量的最佳方法是什么?

What is the best way to make www.example.com AND example.com use the same session variables?

我使用的是 ubuntu 12.04、php5、apache2.

I'm using ubuntu 12.04, php5, apache2.

<VirtualHost *:80>
    ServerAdmin webmaster@localhost
    ServerName www.example.com
    Redirect 301 / http://example.com/
    DocumentRoot /var/www/public_html
    <Directory />
            Options FollowSymLinks
            AllowOverride None
    </Directory>
    <Directory /var/www/public_html>
            Options Indexes FollowSymLinks MultiViews
            AllowOverride None
            Order allow,deny
            allow from all
    </Directory>

    ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/
    <Directory "/usr/lib/cgi-bin">
            AllowOverride None
            Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch
            Order allow,deny
            Allow from all
    </Directory>

    ErrorLog /var/log/apache2/error.log

    # Possible values include: debug, info, notice, warn, error, crit,
    # alert, emerg.
    LogLevel warn

    CustomLog /var/log/apache2/access.log combined

Alias /doc/ "/usr/share/doc/"
<Directory "/usr/share/doc/">
    Options Indexes MultiViews FollowSymLinks
    AllowOverride None
    Order deny,allow
    Deny from all
    Allow from 127.0.0.0/255.0.0.0 ::1/128
</Directory>

推荐答案

让 www.mysite.com 和 mysite.com 使用相同会话变量的最佳方法是什么?

What is the best way to make www.mysite.com AND mysite.com use the same session variables?

最好的方法是不要让两个主机名运行同一个站点.

The best way is to not have both host names running the same site.

选择其中一个作为规范，然后将所有内容从另一个重定向到规范的.

Pick one of them to be canonical, then redirect everything from the other to the canonical one.

<VirtualHost *:80>
ServerName example.com
Redirect 301 / http://www.example.com
etc

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