Here is my code that I have written but I am getting an error message;

<?php
//Available roles: admin, editor, author, subscriber
if (!isset($role)) {
    $role = 'subscriber';
}

//change to switch statement
if ($role != 'admin') {
    echo 'You do not have access to this page. Please contact your administrator.';
} else {
      switch ($role) {
    case 'admin':
          echo 'As an admin, you can add, edit, or delete any post.';
      break;

    case 'editor':
          echo 'As an editor, you can add or edit any post, and delete your own posts';
      break;

    case 'author':
          echo 'As an author, you can add, edit, or delete your own post.';
      break;

    default:
          echo 'You do not have access to this page. Please contact your administrator.';
    break;
         }
}