How can developers troubleshoot and resolve errors related to Cross-site request forgery validation when using the Facebook PHP API?

Issue: Developers can troubleshoot and resolve errors related to Cross-site request forgery (CSRF) validation when using the Facebook PHP API by ensuring that the CSRF token is included in all requests and verified before processing any data from Facebook.

// Verify CSRF token before processing any data from Facebook
if ($_REQUEST['csrf_token'] !== $_SESSION['csrf_token']) {
    // Handle CSRF validation error
    die("CSRF validation failed. Please try again.");
}

// Process data from Facebook API
// Your code for processing data goes here