// Create a session instance with default settings
$session = new flight\Session();

// Store some data
$session->set('user_id', 123);
$session->set('username', 'johndoe');
$session->set('is_admin', false);

// Retrieve data
echo $session->get('username'); // Outputs: johndoe

// Use a default value if the key doesn't exist
echo $session->get('preferences', 'default_theme'); // Outputs: default_theme

// Remove a session value
$session->delete('is_admin');

// Check if a value exists
if ($session->get('user_id')) {
    echo 'User is logged in!';
}

// Clear all session data
$session->clear();

$session = new flight\Session([
    'save_path' => '/custom/path/to/sessions', // Custom directory for storing session files
    'encryption_key' => 'your-secret-32-byte-key', // Enable encryption with a secure key
    'auto_commit' => true, // Automatically commit session changes on shutdown
    'start_session' => true, // Start the session automatically
    'test_mode' => false, // Enable for testing without affecting PHP's session state
]);

// Create a session with encryption enabled
$session = new flight\Session([
    'encryption_key' => 'a-secure-32-byte-key-for-aes-256-cbc',
]);

// Now all session data will be automatically encrypted when stored
$session->set('credit_card', '4111-1111-1111-1111');

// Regenerate the session ID and keep the current session data
$session->regenerate();

// Regenerate the session ID and delete the old session data
$session->regenerate(true);