Cookie仅在特定目录中有效

Question

I have set up a simple login page on http://mywebsite.com/control. When you login, it places a cookie called user on your computer. To set the cookie I simply use:

setcookie("user", $_POST['IGN']);

When I am on the directory /control, it works fine. For example, if I use the code:

echo $_Cookie['user'];

it echos out the cookie information. However, if I do this on any page that is not in the /control directory, it says:

Notice: Undefined index: user in /var/www/other/vars.php on line 16

Line 16 is where it echos. This is an image of the cookie information in Chrome:

Answer 1

You should use:

setcookie("user", $_POST['IGN'],0,'/');

if you want cookie to be visible in the whole domain

You should also use:

echo $_COOKIE['user'];

with capital letters

You should also read more about setting cookies at http://www.php.net/manual/en/function.setcookie.php - by default cookies are set only for directory where you set cookie. That's why you need to add as 4th parameter '/'