似乎未设置PHP cookie superglobal

Question

I am currently developing a PHP website. I am trying to set a cookie which will store a user id. This is for a logging in system and I need the user id to be able to add it into different tables in a MySQL database.

When the user successfully logs in it creates a PHP session and a cookie and then uses a meta tag refresh to direct to the index page.

if ($row = mysql_fetch_array($result))
{
    setcookie('id', $row['use_id']);
    $_SESSION['user'] = $username;
    setcookie('userID', $row['use_id']);
    echo '<meta http-equiv="refresh" content="0;url=../index.php">';
}

If I remove the meta refresh and just echo the cookie using $_COOKIE['userID'] it works fine but when I try and use $_COOKIE['userID'] on the index.php page after it has done the meta refresh it isn't displaying anything.

Answer 1

setcookie('userID', $row['use_id'], 0, "/");

Edit: zero for expire time.

Your cookie is not visible for index.php because it has been set from script in subdirectory. So it is not visible for pages on upper levels. You should set cookie path (4th parameter) to "/" and the cookie will be available within the entire domain.

This was the reason why your cookie was not visible to index.php.

header('Location: ../index.php');
                  ^^^

You have redirected page to upper directory level, but your cookie was not set for entire domain.

Answer 2

if the index pages directory is upper than the directory which you set the cookie from, the cookie will not be available in the index page. And i suggest you to use location header for redirections. Hope this will help you.