What are the implications of not resetting a cookie when its validity period is about to expire?

If a cookie is not reset when its validity period is about to expire, the user may lose their session data or be logged out unexpectedly. To prevent this, you can reset the cookie by updating its expiration time whenever it is accessed. 

// Check if the cookie exists and is about to expire
if(isset($_COOKIE['example_cookie']) && time() - $_COOKIE['example_cookie'] > 3600) {
    // Reset the cookie by updating its expiration time
    setcookie('example_cookie', $_COOKIE['example_cookie'], time() + 3600);
}

Keywords

cookie expiration validity period PHP session management

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