What potential issues should be considered when dealing with user logouts and browser closures in PHP?

One potential issue when dealing with user logouts and browser closures in PHP is ensuring that the user's session is properly destroyed to prevent unauthorized access to their account. This can be done by calling the session_destroy() function when the user logs out or the browser is closed. Additionally, it's important to clear any session variables that may contain sensitive information to maintain the security of the user's data.

// Code snippet to properly destroy the user's session on logout or browser closure
session_start(); // Start the session
session_unset(); // Unset all session variables
session_destroy(); // Destroy the session