php $_SESSION accessing in node.js or in socket.io

I have php login system that authenticate user. I access the user authenticated name by using the

$_SESSION['username'];

or the the logind id

$_SESSION['loginid'];

my question for this how can i retreive those value in $_SESSION['username']; or $_SESSION['loginid'];

using node.js or socket.io ?. Is it possible ?

Thank you in advance.