What are the best practices for handling sessions in PHP classes?

When handling sessions in PHP classes, it is important to start the session at the beginning of the script, store session data using the $_SESSION superglobal, and properly destroy the session when it is no longer needed. It is also recommended to use session_regenerate_id() to prevent session fixation attacks.

<?php
class SessionHandler {
    public function __construct() {
        session_start();
    }

    public function setSessionData($key, $value) {
        $_SESSION[$key] = $value;
    }

    public function getSessionData($key) {
        return $_SESSION[$key];
    }

    public function destroySession() {
        session_unset();
        session_destroy();
    }
}
?>