PHP登录然后重定向

Question

I am using the following code to log users in to a series of secure pages - I need to have each user redirected to an appropriate page once submitted, I'm wondering what steps I need to take to single out the three login levels (admin,special,user):

if(isset($_SESSION['username'])){

    function check_login($level) {

        $username_s = mysql_real_escape_string($_SESSION['username']); 

        $sql = "SELECT user_level, restricted FROM login_users WHERE username = '$username_s'"; 
        $result = mysql_query($sql);
        $row = mysql_fetch_array($result);

        $user_level = $row['user_level'];
        $restricted = $row['restricted'];

        $sql = "SELECT level_disabled FROM login_levels WHERE level_level = '$user_level'"; 
        $result = mysql_query($sql);
        $row2 = mysql_fetch_array($result);

        $disabled = $row['level_disabled'];

        if($disabled != 0) { include('disabled.php'); exit();

        } elseif($restricted != 0) { include('disabled.php'); exit();

        } elseif($user_level <= $level) { // User has authority to view this page.      

        } else { include('user_level.php'); exit();

        }

    }

} else {

    function check_login($level) { exit(); }
    include('login.inc.php'); exit();

Answer 1

I would store the login level in a $_SESSION variable and then redirect the user based on that as you'll want to keep track of that login level from page to page. To redirect them, use header() with a Location: string.

For ex:

if ($_SESSION['log_level'] == 'admin') {
   header("Location: admin.php");
} else if ($_SESSION['log_level'] == 'editor') {
   header("Location: editor.php");
} else if ($_SESSION['log_level'] == 'author') {
   header("Location: author.php");
}