Share session in simple machine forum to subdomain

I've deployed simple machine forum at smf.com domain, and than I created simple application to read session from the smf.com, but i deployed the simple application in the subdoamin, let say I put my simple application in simple.smf.com

In order to read session from domain, I must put ini_set("session.cookie_domain",".smf.com"); before session start. I must put it in the smf project file and also simple aplication too.

where I should put ini_set("session.cookie_domain",".smf.com") so it will by pass to the session start.

I have put the ini_set("session.cookie_domain",".smf.com") in the load.php file

function loadSession()
{
   global $HTTP_SESSION_VARS, $modSettings, $boardurl, $sc;

   // Attempt to change a few PHP settings.
   @ini_set("session.cookie_domain",".smf.com");
开发者_开发知识库   @ini_set('session.use_cookies', true);
   @ini_set('session.use_only_cookies', false);
   @ini_set('url_rewriter.tags', '');
   @ini_set('session.use_trans_sid', false);
   @ini_set('arg_separator.output', '&');
}

while I try to read cookie form subdomain. It couldn't read the domain session. my subdomain code is:

<?php 
 ini_set("session.cookie_domain",".smf.com");
 session_start();

 print_r($_SESSION);
?>

You can set it in the php.ini file or in a .htaccess

php_value session.cookie_domain ".smf.com"

You could also try placing the ini_set at the top of the index.php, however it would only work for pages called from the index.php

1. check Use subdomain independent cookies in the server setting of simple machine forum.

2. include the SSI.php to my site, the code is:

   include("../SSI.php");

   if ($context['user']['is_guest']) { ssi_login(); } else { //You can show other stuff here. Like ssi_welcome(). That will show a welcome message like. //Hey, username, you have 552 messages, 0 are new. ssi_logout(); }