在预准备语句中使用bind_result和store_result

Question

我有一个mysqli登录脚本在这里工作正常：

if (isset($_POST['loginSubmit'])) {
  $loginCheck = $mysqli->prepare('SELECT cms_user, cms_email FROM cms_accounts WHERE cms_email=? AND cms_password=?');
  $loginCheck->bind_param('ss',$_POST['loginEmail'],sha1($_POST['loginPass']));
  $loginCheck->execute();

  $loginCheck->store_result();
  if ($loginCheck->num_rows > 0) { 
    $_SESSION['loggedIn'] = '1'; 
  }
  else { $loginFail = true; }

  $loginCheck->close();
}

现在我想将查询中选择的数据添加到其他会话变量中。所以我像这样添加bind_result()和fetch()：

if (isset($_POST['loginSubmit'])) {
    $loginCheck = $mysqli->prepare('SELECT cms_user, cms_email FROM cms_accounts WHERE cms_email=? AND cms_password=?');
    $loginCheck->bind_param('ss',$_POST['loginEmail'],sha1($_POST['loginPass']));
    $loginCheck->execute();

    $loginCheck->bind_result($loginUser,$loginEmail);
    $loginCheck->fetch();
    $loginCheck->store_result();
    if ($loginCheck->num_rows > 0) { 
      $_SESSION['loggedIn'] = '1'; 
      $_SESSION['loginUser'] = $loginUser;
      $_SESSION['loginEmail'] = $loginEmail; 
    }
    else { $loginFail = true; }

    $loginCheck->close();
  }

突然登录失败。是否可以在同一个查询中包含store_result()和bind_result()？是否有命令将它们写入？