What are the potential pitfalls of using Sessions in PHP for storing user input data in a guessing game like this?

Potential pitfalls of using Sessions in PHP for storing user input data in a guessing game include: 1. Sessions can be vulnerable to session hijacking or session fixation attacks if not properly secured. 2. Storing large amounts of data in sessions can lead to performance issues due to increased server load. 3. Sessions may not be reliable if the user's browser does not support cookies or if cookies are disabled. To solve these issues, it is recommended to store user input data in a database or use secure cookies for storing session data.

// Using secure cookies for storing user input data in a guessing game
// Set cookie with user input data
setcookie("user_input", $user_input, time() + 3600, "/", "", true, true);

// Retrieve user input data from cookie
$user_input = $_COOKIE["user_input"];