How can JSON encoding and decoding be utilized effectively in PHP to manage form data and navigation between steps?

To manage form data and navigation between steps in PHP, JSON encoding and decoding can be utilized effectively. This allows for storing complex data structures in a more manageable format, making it easier to pass data between different steps of a form or navigation flow.

// Encode form data as JSON and store it in a session variable
$formData = ['name' => 'John Doe', 'email' => 'johndoe@example.com'];
$_SESSION['formData'] = json_encode($formData);

// Decode form data from session variable and use it
$formData = json_decode($_SESSION['formData'], true);
echo 'Name: ' . $formData['name'] . '<br>';
echo 'Email: ' . $formData['email'];