Need help to receive Cross-Domain Sessions/Cookies using jQuery ajax

[sagnik]

I've two domains, for example, accounts.com & domain2.com.

I've set some sessions in domain2.com. And I need to remove those sessions from accounts.com using ajax. How can I achieve this?

 

 

THE PROBLEM:

<?php
session_start();
require_once dirname(dirname(__FILE__))."/config/config.php";
header("Access-Control-Allow-Origin: accounts.com");
header("Access-Control-Allow-Credentials: true");
header("Access-Control-Allow-Methods: POST");
header("Access-Control-Allow-Headers: Content-Type, *");
if(!empty($_POST['sgnsid'])){
	/* print_r($_COOKIE);
	print_r($_SESSION); */
	session_unset($_SESSION['sgn-login_sessid']);
	session_unset($_SESSION['sgn-login_uid']);
	session_unset($_SESSION['sgn-login_uid_md5']);
	session_unset($_SESSION['sgn-login_expires']);
	session_unset();
	session_destroy();
	session_write_close();
	echo "done";
} else {
	echo "Empty SGNSID";
}
?>

Now, when a user clicks on the "Logout" button, an ajax call is made to the "signoff.php" on "domain2.com":

$.ajax({
	url: "https://domain2.com/signoff.php",
	type: "POST",
	crossDomain:true,
	xhrFields: {
		withCredentials: true
	},
	success: function(d){
		console.log(post);
		if(post=="done")
			done=true;
	}
});

But when I look into the Console the script is returning (if the print_r($_SESSION) & print_r($_COOKIE) ar not commented):

Array

(

)

Array

(

)

done

Otherwise:

done

 

And also the session variables were not removed.

 

And what I'm building is a SingleSignOn system.

And what I'm trying to do is, when a user logs in in accounts.com, some cookies & sessions are set two all the domains. Same way, when a user clicks on "Logout" button all the cookies & sessions must be removed from all the domains using ajax.