What is the best way to completely empty a session array in PHP?

To completely empty a session array in PHP, you can use the `session_unset()` function to remove all variables from the session array. This function will unset all variables registered in the session. After calling `session_unset()`, you can also call `session_destroy()` to destroy the session data completely.

session_start(); // Start the session
session_unset(); // Unset all session variables
session_destroy(); // Destroy the session data