PHP Session Variable from subdomain to main domain

Question

i Have setup 2 domains/sites in the ISPConfig on amazon Web server EC2 instance,

i have a domain named app.example.com and the other is https://www.example.com Both dom

Answer 1

The first comment of @Alan Gularte replies quite well I think. If it does not work, you may consider writing a cookie yourself to pass info back and forth.

setcookie ("PassMySessionName", $_SESSION['user_name'], time() - 3600, "/", "example.com");

Setting cookie domain to "example.com" will make it available both on www. and app.

On the other side you will find it in the $_COOKIE array.

$PassedUserName=$_COOKIE["PassMySessionName"];

If you need it all to work without cookies enabled, it gets much more complicated, as $_SESSION will work appending parameters to your urls transparently. In that case (if you link from one site to the other) you may add them manually to the urls.