What are the potential pitfalls of using the "zurück-Button" in the browser after logging out in PHP applications?

After logging out in a PHP application, using the "zurück-Button" in the browser can potentially allow a user to navigate back to a cached page that should only be accessible when logged in. This can lead to security vulnerabilities and unauthorized access to sensitive information. To prevent this, you can include code in your PHP application to disable caching on sensitive pages.

// Prevent caching on sensitive pages after logging out
header("Cache-Control: no-cache, no-store, must-revalidate"); // HTTP 1.1.
header("Pragma: no-cache"); // HTTP 1.0.
header("Expires: 0"); // Proxies.