creates a gui in php with a couple example controls

I couldn't find very many helpful tutorials for GTK, so i hope this helps some people

<?php

    class GUI extends GtkWindow {

        /*
         * Class constructor
         * 
         *  @param int $width       window width
         *  @param int $height      window height
         *  @param int $title       title bar text
         * 
         */

        public function __construct($width=400, $height=200, $title="PHP-GTK GUI") {
            // Call parent class constructor
            parent::__construct();

            // Set basic window properties
            $this->set_default_size($width,$height);
            $this->set_title($title);
            $this->connect_simple("destroy",array($this,"__destruct"));

            // Creates widgets
            $this->setControls();

            // Updates GUI
            $this->show_all();
        }

        /*
         * Class destructor
         * 
         * Breaks main GTK loop and destroys window
         */

        public function __destruct() {
            gtk::main_quit();
        }

        /*
         * Creates controls used in window
         */

        private function setControls() {

            // Creates new buttons and text label
            $lbl =& new GtkLabel("Hello World!");
            $bOk =& new GtkButton("_Ok");
            $bClose =& new GtkButton("_Close");

            // Bind events to widgets
            $bOk->connect_simple("clicked",array($this,"createDialog"));
            $bClose->connect_simple("clicked",array($this,"destroy"));

            // Creates a grid and attaches widgets to it
            $tbl =& new GtkTable(4,2);
            $tbl->attach($lbl,0,1,0,2);
            $tbl->attach($bOk,1,2,0,1);
            $tbl->attach($bClose,1,2,1,2);

            // Adds grid to the window
            $this->add($tbl);
        }

        /*
         * Creates Modal dialog
         */

        public function createDialog() {
            $dialog =& new GtkMessageDialog($this, Gtk::DIALOG_MODAL, Gtk::MESSAGE_WARNING, Gtk::BUTTONS_OK, "PHP-GTK Modal Dialog");
            $dialog->set_markup("<span foreground='blue'>Modal Dialog example</span>");
            $dialog->run();
            $dialog->destroy();
        }
    }

    if (class_exists("gtk")) { // Checks if GTK module is loaded

        // Creates new instance of class GUI
        new GUI(300,75,"Example Window");
        Gtk::main();

    }   else die("GTK Module not loaded."); // Exit

?>