php - 如何在php中将 session 从用户名更改为id？

Question

        // LOGIN USER
        if (isset($_POST['login_user'])) {
          $username = mysqli_real_escape_string($db, $_POST['username']);
          $password = mysqli_real_escape_string($db, $_POST['password']);

          if (empty($username)) {
            array_push($errors, "Username is required");
          }
          if (empty($password)) {
            array_push($errors, "Password is required");
          }

          if (count($errors) == 0) {
            $password = md5($password);
            $query = "SELECT * FROM register WHERE username='$username' AND password='$password'";
            $results = mysqli_query($db, $query);
        }   

            $qry = "SELECT * from register";
            $result = mysqli_query($qry);

            $row = mysqli_fetch_array($result);
            $id = $row[0];


            if (mysqli_num_rows($results) == 1) {
    //here i want to change session from username to id          
     $_SESSION['username'] = $username;
              $_SESSION['success'] = "You are now logged in";
              header('location: index.php');
            }else {
                array_push($errors, "Wrong username/password combination");
            }
          }
        ?>

此代码也可以工作，但我想将用户名 session 替换为 id session 。请帮助我如何用 id 替换它。 在这里我想将 session 设置为用户名的 id。所以请帮助我如何获得代码的解决方案。

Answer 1

只需复制此代码: 替换您的代码

$_SESSION['username'] = $username; 

到

$_SESSION['id'] = $username;

看起来像:

if (mysqli_num_rows($results) == 1) {
    //here i want to change session from username to id          
    $_SESSION['id'] = $username;
    $_SESSION['success'] = "You are now logged in";
    header('location: index.php');
}else {
    array_push($errors, "Wrong username/password combination");
}