$token = fetch_token(); // save the token to a session or database $_SESSION['token'] = $token;
// retrieve the token from a session or database $storedToken = $_SESSION['token']; // compare the stored token with the one provided by the user if ($storedToken === $_POST['token']) { // token is valid } else { // token is invalid }
// set an expiration time for the token (e.g. 10 minutes) $expirationTime = time() + 600; // add the expiration time to the token using a separator $token = fetch_token() . '|' . $expirationTime; // save the token to a session or database $_SESSION['token'] = $token; // validate the token and check if it has expired list($storedToken, $expirationTime) = explode('|', $_SESSION['token']); if ($storedToken === $_POST['token'] && time() < $expirationTime) { // token is valid and hasn't expired yet } else { // token is invalid or has expired }The fetch_token function is not a part of a specific package library as it is a simple function that can be written in PHP directly. However, it can be included in a larger security library or framework that provides additional security measures and best practices.