在php中的同一个域上有1个会话（id）

Question

I'm running PHP7 on a debian 8 server. I host 2 domains on this server. What I want is 1 session_id per domain. I'm having trouble changing session information in an ajax/php call in the php file because the session_id is different.

there's a setup.php which is included in index.php and calledByAjax.php at the top of both files. In setup.php I run SESSION_START() .

Below explains the problem in code.

domain.com/helpers/ Setup.php

session_start();

domain.com/ index.php

include("helpers/settings.php" );
echo session_id(); // output: c4eapvno37vg027aba4pk2gl06

<script>
ajax.open("POST", "http://www.domain.com/calls/calledByAjax.php.php", true);
// response output: asdf98asdfahasdfl
</script>

domain.com/ calledByAjax.php

echo session_id();

Answer 1

Sessions are unique to a domain name because cookies are. You can, however, share a session cookie over multiple subdomains, provided that the main domain enforces a www subdomain and if you prefix the cookie name with a dot:

http://php.net/manual/en/function.session-set-cookie-params.php

$domain

Cookie domain, for example 'www.php.net'. To make cookies visible on all subdomains then the domain must be prefixed with a dot like '.php.net'.

Answer 2

The problem was in the ajax call. I called to http:// www .domain.com/--- from http://domain.com/----

ajax.open("POST", "http://domain.com/calls/calledByAjax.php.php", true);