cookies problem in PHP and AJAX

Question

I face some problem on my script that I use PHP and jquery to create login system.

First I have PHP page contain form for login. when user click submit I use jquery to send data to server

$.post('server_login.php', {username:username.val(), password:password.val()}, function(data){
    alert(data);
}); 

in server_login.php I have function to doing login user.

if($_POST['username']=='username' && $_POST['password']=='1234'){
    $expire = time() + 60*60*24*30; //1 month expired.
    setcookie("user_id", $_POST['username'], $expire);
    echo true;
}

and jquery alert "1" on my login page.

the problem is when i refresh my website and retieve cookie, it not show me.

print_r($_COOKIE);

anything wrong?

Answer 1

If the script you are calling is located in another folder on the server (or via url rewrite it appears as if it is under another path), make sure to set the path parameter of the cookie.

By default, setcookie() sets the cookie only for the current path.

If your page is www.domain.com and you make ajax call to www.domain.com/auth/login.php the cookie will be set to /auth and will not be available outside /auth.

So try changing to this:

setcookie("user_id", $_POST['username'], $expire, '/');