<?php
//Function to retrieve text from GtkEntry and print it
function get_input($entry) {
    $input = $entry->get_text();
    echo "$input\r\n";
    $entry->grab_focus();
    $entry->set_text("");
}
 
//Setting up the Window
// Note the usage of connect_simple()
// instead of deprecated connect_object()
$window = new GtkWindow();
$window->set_position(Gtk::WIN_POS_CENTER);
$window->connect_simple('destroy', array('Gtk', 'main_quit'));
 
//Adding a box to the Window to allow more than one Child
$box = new GtkVBox();
$window->add($box);
 
//Adding the GtkEntry widget and connecting
// it to the callback function: get_text()
$entry = new GtkEntry();
$entry->connect('activate', 'get_input');
$box->add($entry);
 
//Adding a GtkButton to the box and use connect_simple()
// so that it will pass the GtkEntry to the callback
// function when it is clicked
$button = new GtkButton('Click Me to echo input!');
$button->connect_simple('clicked', 'get_input', $entry);
$box->add($button);
 
//Display everything and start the main loop
$window->show_all();
Gtk::main();
?>