php-gtk flush label object

[cwarn23]

Hi and I have almost made a php-gtk search engine indexer but just need this last line of code converted from php to php-gtk. I have found the below example and modified it to represent every piece of my script in a much simplified format but my question is on line 7 (bottom code box) how do I make the script display the changes to the $label object. This is because it can take days to fully execute my script so continual display updating/flushing is needed.

 

Now I have tried a wide range of things and from what I can see, if I use the below line, it only flushes what is in the text que for the echo statement.

flush();

 

Also I have tried each of the following without any success.

gtk.gdk.flush();
Display.flush();
Gtk.Gdk.Display.flush();
gtk.gdk.Display.flush();
GTK.GDK.Display.flush();

 

Also in addition to that I tried using the ob_flush() function. So for that I place ob_start(); at the beginning of my code and on line 7 of the below code I added ob_flush();

<?php
function updateCounter($label)
    {
    // Set the label text to the current text plus one.
    $label->set_text($label->get_text() + 1);
    
    // line 7
   /* ---------------------------------------------
       somehow flush above object & qued data here.
       --------------------------------------------- */
sleep(5);
}

// Create a window to hold the label.
$window = new GtkWindow();
$window->connect_simple('destroy', array('Gtk', 'main_quit'));

// Create a label.
$label = new GtkLabel('0');

// Create a button that will be used to increment the counter.
$button = new GtkButton('Click Me!');
$button->connect_simple('clicked', 'updateCounter', $label);

//Group objects into a box
$vBox = new GtkVBox();
$vBox->pack_start($label);
$vBox->pack_start($button);

// Add the box to the window.
$window->add($vBox);

// Show the window and start the main loop.
$window->show_all();
Gtk::main();
?>

Does anybody know what I can do to make the $label object display/flush as I have spent hours on this and still got nowhere.

Please help.

[cwarn23]

??? Please help.

I have also just tried $label->flush(); but it makes the program freeze. I have also found that $window->flush(); makes the program crash.