This is a example to wizard layout in UI library:

<?php

/*
 * Wizard sample layout builded with PHP UI
 */

use UI\Window;
use UI\Size;
use UI\Controls\Button;
use UI\Controls\Grid;
use UI\Controls\Box;
use UI\Controls\Form;
use UI\Controls\Entry;
use UI\Controls\Label;

/*
 * The window
 */
$window = new Window('Wizard Sample Layout', new Size(640, 480), TRUE);
$window->setMargin(true);

/*
 * Wizard content (sample)
 */
$content = new Form();
$content->setPadded(true);
$content->append('User:', new Entry());
$content->append('Password:', new Entry(Entry::Password));

/*
 * Layout to title, content and buttons
 */
$grid = new Grid();
$grid->setPadded(false);

/*
 * Title
 */
$grid->append(new Label('Wizard Sample'), 0, 0, 6, 1, true, Grid::Fill, false, Grid::Fill);

/*
 * Append content
 */
$grid->append($content, 0, 1, 6, 1, false, Grid::Fill, true, Grid::Fill);

/*
 * Left buttons
 */
$left_box = new Box(Box::Horizontal);
$left_box->append(new Button('&About'));
$left_box->append(new Button('&Help'));

/*
 * Right buttons
 */
$right_box = new Box(Box::Horizontal);
$right_box->append(new Button('&Back'));
$right_box->append(new Button('&Forward'));
$right_box->append(new Button('&Close'));

/**
 * Append buttons
 */
$grid->append($left_box, 0, 2, 1, 1, true, Grid::Start, false, Grid::Fill);
$grid->append($right_box, 5, 2, 1, 1, true, Grid::End, false, Grid::Fill);

/*
 * Append layout and show.
 */
$window->add($grid);

$window->show();

UI\run();

?>