将用户角色存储在会话变量中

Store the users role in a session variable

$_SESSION["role"]=1;

或

$_SESSION["role"]=2; 

取决于存储的用户信息.

depending on the stored user information.

然后，当您检查权限时，只需检查此变量:

Then when you check the permissions, you just check this variable:

if($_SESSION["role"]==2){
  header('Location: ../admin/index.php');
} else {
  echo "you need the admin role to view this page!";
}

另一个建议: 如果用户没有管理员角色，***检查../admin/index.php中的权限并重定向回默认页面.否则，如果用户知道URL，则他们可能可以直接浏览到../admin/index.php.

Another advice: It would be better to check the permissions in ../admin/index.php and redirect back to the default page if the user does not have the admin role. Otherwise users might be able to directly browse to ../admin/index.php if they know the URL.