php set session with cookies - php

Question

$_SESSION['user_id'] = $login;
setcookie('user_id', '$login' , time()+86000);
header('Location: userindex.php');
function logged_in() {
return (isset($_SESSION['user_id']) || isset($_COOKIE['user_id']) ? true : false;
}
I have SESSION but I wonna include COOKIE too but I don't know how to restart SESSION with COOKIE. I don't have a idea how I can get that. I create COOKIE but can't logout and have problem with SESSION somebody can help me to fix my problem???? And in every page on top I have logged_in function for check if user is logged in or not I wonna these logged_in function to check if user has cookie to auto login to user cookie. I think it is in logged_in function must get write some code and...

Answer 1

I will note that this is not secure, as any one can create the cookie, using something like firebug.
#session_start();
function logged_in() {
if(!isset($_SESSION['user_id']) && isset($_COOKIE['user_id'])) {
$_SESSION['user_id'] = $_COOKIE['user_id'];
}
return isset($_SESSION['user_id']);
}
function logout() {
unset($_SESSION['user_id']);
setcookie("user_id", "", time() - 3600);
header("Location: http://".$_SERVER['HTTP_HOST']);
exit;
}
Edit: Added logout() - will remove both session and cookie 'user_id', then redirect to homepage

Answer 2

First: you should set it with:
setcookie('user_id', $login , time()+86000);
So $login without quotes. And also maybe set path variable if this cookie should be seen in different pages.
Removing cookie is done with setting negative time value:
setcookie('user_id', '' , time()-86000);

Answer 3

session_start();
function logged_in() {
if(!isset($_SESSION['user_id']) && isset($_COOKIE['user_id'])) {
$_SESSION['user_id'] = $_COOKIE['user_id'];
}
return (isset($_SESSION['user_id'])) && isset($_COOKIE['user_id'])));
}