share session across multiple subdomains

Hi Friends,

I want to share session in multiple sub-domains. let me explain little more
suppose there are 2 domains 1) sub1.example.com and 2)sub2.example.com
if user logs in to sub1.example.com and then opens sub2.example.com then MODx should show him
logged in automatically.

This is possible with plain php and i have tested it. we just need to add one line before session_start() ie ini_set(’session.cookie_domain’, ’.example.com’);

I am using MODx login package and not sure where should i add this line. If someone know it please help me.
thanks in advance

For Evo, in the manager/includes/config.inc.php file the function at the end of the file has this line:

You would need to add the .

scottwell thanks for the quick reply...
i am using revolution...which file i am supposed to edit ??

Do i need to make change in core->model->modx->modx.class.php
line number 2856
setcookie(session_name(), session_id(), $cookieExpiration, $cookiePath, $cookieDomain,$cookieSecure);
to
setcookie(session_name(), session_id(), $cookieExpiration, $cookiePath, ’.’.$cookieDomain,$cookieSecure);

In Revolution, just add a System Setting with the key session_cookie_domain and the value of .domain.tld.

@scottwell : i added this system setting "session_cookie_domain", but still it doesnt works
Below is what all i did,
1) added this setting on both the MODx (sub1 and sub2 aswell) Just to make sure i tried if setting i just created is accessible to MODx...and yes "session_cookie_domain" is fetching the new value.
2) As i have said before i created simple php pages outside MODx...and found that they share session i can see session created on sub1 is accessible on sub2.
3) when i try to do it with login package...it again asks me for login even when i am logged in on sub...i also created same username password on both the domains.
4) without using login package i simply set SESSION with "testing" key and some value...that also dont get shown on sub2 (which works if i do it outside of MODx)

Is it problem with MODx or login system ??

You must login to each Context explicitly.

U mean there is no way i can create centralized login system for 2-3 subdomains ??

Yes, you configure the Login component to login to ALL the Contexts you want a user authorized in.

@opengeek : Can u please explain it in more details....what exact changes i need to make into login package ??

Set the &contexts setting to include all of your contexts: