Allow php sessions to carry over to subdomains

Question

I use php sessions (not cookies, except for session id cookie) for all user data, and when a user goes to their profile user.mydomain.com they are immediately \"logged out\"

Answer 1

Here are 4 options.

Place this in your php.ini:

session.cookie_domain = ".example.com"

Or in your .htaccess:

php_value session.cookie_domain .example.com

Or as the first thing in your script:

ini_set('session.cookie_domain', '.example.com' );

Or in your php-fpm pool configuration for your site:

php_value[session.cookie_domain] = .example.com

Answer 2

Try This:

session_start(); 

$sessionId =  session_id();

logged the user. When user will switch to other subdomain sent the session id in the URL like this user.mydomain.com/?id=$sessionId

$sessionId =  $_GET['id'];

session_start($sessionId); 

Now the user will get all the session values and stay logged in.

Answer 3

change the session name at the top of the core functions file like

 session_name('mysession');

then use the following code into the php page

  session_set_cookie_params(0,"/",".example.com",FALSE,FALSE);
  setcookie(session_name(), session_id(),0,"/","example.com");
  session_start();

finally change the default session name of the subdomain and remove the default cookie in subdomain's core functions file like:

 /*default session name*/
 session_name("mysession");
 /*remove the PHPSESSID and default session name from subdomain's cookie*/
 setcookie( "mysession", "",1,"/" );
 setcookie( "PHPSESSID", "",1,"/" );

if you continue with using your cookie name as PHPSESSID ,just remove all the functions with

 "mysession" string like session_name('mysession'), setcookie( "mysession", "",1,"/" );

then check your browser's existing cookies, just remove all the cookies of domain and subdomain, and repeat the process.

Answer 4

Another option that worked for me: is to force the name of the session:

session_name("myWebsite");
session_start();