Error: Unable to initialize GTK+, is DISPLAY set properly ...
github.com › wxphp › wxphpOct 03, 2014 · jjjj12212 commented on Oct 3, 2014. I just installed the wxWidget and wxPHP and when I loaded the extension on the server and restarted, when I load my existing PHP projects they crash with the following errors: Error: Unable to initialize GTK+, is DISPLAY set properly? (apache2:4532): GLib-GObject-WARNING **: invalid (NULL) pointer instance.