SWITCH statement bug

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


//change to switch statement
/*$role = ['admin', 'editor', 'author'];*/
if ($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;
}

}

?>