function isAdministrator() { // check if the current user is an administrator return (isset($_SESSION['user_role']) && $_SESSION['user_role'] == 'admin'); } // usage example if (isAdministrator()) { // show admin panel or allow access to certain functionality } else { // redirect to login page or show an error message }This code checks if the user's role stored in the session is 'admin'. If it is, the function returns true, and the user will be granted access to certain functionality. If not, the user will be redirected to a login page or shown an error message. The package/library used in this example code is not specified, as the isAdministrator function could be implemented in various ways and using different libraries depending on the framework or application where it is used. However, the code could be part of a larger authentication or authorization package/library, which may include functions or classes for user roles, permissions, and access control.