How to prepare a .exe file of a php gtk application

<?php
$window = new GtkWindow();
$button = new GtkButton('Hello word!'); //$button->connect('clicked','olamundo');

$window->add($button);
$window->show_all(); Gtk::main();
?>

Codes are here. I run it and see result of hello.php but i want to find exe file of hello.php. How to find this file ?