What is the difference between setting the cookie expiration time based on general duration versus inactivity duration in PHP?

Setting the cookie expiration time based on general duration means that the cookie will expire after a specific amount of time, regardless of whether the user is active on the website or not. On the other hand, setting the cookie expiration time based on inactivity duration means that the cookie will expire only if the user has been inactive for a certain period of time. To implement setting the cookie expiration time based on inactivity duration in PHP, you can use a combination of setting the cookie with a specific expiration time and updating the cookie expiration time whenever the user interacts with the website. This way, the cookie will only expire if the user has been inactive for the specified duration.

// Set the initial cookie with a specific expiration time
$expiration_time = time() + 3600; // Cookie will expire in 1 hour
setcookie('user_cookie', 'value', $expiration_time);

// Update the cookie expiration time whenever the user interacts with the website
if (isset($_COOKIE['user_cookie'])) {
    $expiration_time = time() + 3600; // Reset expiration time to 1 hour from now
    setcookie('user_cookie', $_COOKIE['user_cookie'], $expiration_time);
}