Hello all,
Browsing the php-gtk documentation about GtkMessageDialog 
http://gtk.php.net/manual/en/gtk.gtkmessagedialog.php i found that the 
link on GtkMessage in the protoype links to the current page. Same issue 
on the GtkMessageDialog Constructor page 
http://gtk.php.net/manual/en/gtk.gtkmessagedialog.constructor.php

The expected target would be a page like the one on edin site:
http://files.edin.dk/php/win32/gtk2/manual/gtk/gtk.enum.message.html