What are the potential pitfalls of using hidden fields to pass array values in PHP?

Using hidden fields to pass array values in PHP can be risky as it exposes the data to potential manipulation by users. It is not a secure method of passing sensitive information as users can easily modify the values before submitting the form. To solve this issue, it is recommended to use sessions or server-side storage to securely pass and retrieve array values.

// Use sessions to securely pass array values
session_start();

// Set array values in session
$_SESSION['array_values'] = $your_array_values;

// Retrieve array values from session
$retrieved_array_values = $_SESSION['array_values'];