Perhaps smart you already think of, since the server side and the client session between a session ID to contact, and session data is stored in a normal file in a specific folder.
Then we need to implement a different domain name, only the following two conditions are met:
1) The session data directory of different domain names is unified together, or synchronized update.
2) for the same customer, use a unified session ID
The implementation of the first condition.
If it is the same server, you do not need to make any settings.
If it's clustered/distributed, then I don't think I need to. To be able to do distributed applications, the experience in directory sharing should be richer than mine. I also did not conduct too many server tests, the subjective and objective conditions of the reasons are.
I'm here to talk about the second condition--to make a different domain name, with a unified session ID.
So how do we unify?
The session ID must first be passed between different domain names, and since the cookie must be for the domain name, the delivery action is done by the client. If the delivery process is not done by the client, the accepted domain name does not know which customer is being targeted.
The second is to modify the session ID under the domain name that is being passed.
How to pass:
In HTML, we can use many different methods. For example
Iframe
<iframe src= "" ></iframe>
Or. js
<script type= "Text/javascript" src= "" ></script>
or an img HTML element
As long as you can call an address, it's OK.
In WML, because of the characteristics of WML script, we cannot use script in this form to invoke, and WML is not an IFRAME. But we can still use IMG to implement the delivery.
How to modify:
Since session ID is normally passed by COOKIE, we only need to pass $_cookie[' PHPSESSID '; But if PHPSESSID is changed by Session_name, we have to modify the PHPSESSID in Setcookie. It's going to get a lot of trouble. So we can choose a session-specific function session_id to modify $_cookie[' PHPSESSID ';
A few things to note:
If Session.use_only_cookies is 0 (php default), then the session ID may be passed as a URL or other form
session_id () and session_name must be used before session_start ()
Here is a simple class that implements a multi-domain name. If the above is not very clear, you can look at my multi-domain name class. This class is implemented in the form of an IFRAME under HTML.
/*
Use:
Server A, Server B, landed in A's index.php, set up a file to receive the session in B, such as ses_get.php
A index.php make the following changes
First add session_start ();
<body></body>, Anywhere write: Mdsession::_set (' b/ses_get.php ')
And ses_get.php in the beginning to write the Mdsession::_get ();
@ Author: surfchen@gmail.com http://www.surfchen.org/*/
<?phpclass mdsession{
function Mdsession ()
{
}function Set ($urls)
{if (!is_array ($urls))
{$urls =array ($urls);} foreach ($urls as $value)
{echo ' <span style= ' position:absolute;visibility:hidden ' ><iframe src= '. $value. '? '. session_id (). ' " ></iframe></span> ';} return true;} function Get ()
{session_id ($_server[' query_string '); session_start (); return true;} function _set ($urls)
{$obj =new mdsession (); return $obj->set ($urls);} function _get ()
{$obj =new mdsession (); return $obj->get ();}
}?>
index.php:
<?php
Include "mdsession.php";
Session_Start ();
$_session[' php ']= "YOGURT8";
Mdsession::_set (' http://www.b.com/ses_get.php ');
Var_dump ($_session);
?>
ses_get.php
<?php
Include "mdsession.php";
Mdsession::_get ();
?>
b.php:
Session_Start ();
Var_dump ($_session);
Visit http://www.a.com/a.php First and then look at the http://www.b.com/b.php effect
In Firefox and Google browser is not a problem, but under Ie or not
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