Are there specific considerations to keep in mind when working with iframes and session handling in PHP, particularly in the context of Facebook Page-Tab-Apps?

When working with iframes and session handling in PHP, particularly in the context of Facebook Page-Tab-Apps, it's important to be aware that sessions may not work as expected due to cross-domain restrictions. To solve this issue, you can use session cookies with a fixed domain and path to ensure that the session is maintained across different pages within the iframe.

// Set session cookie parameters for fixed domain and path
session_set_cookie_params(0, '/', '.yourdomain.com');
session_start();