Gtk2_VarDump is a simple GUI to examine PHP variables, for example complex arrays or objects. It displays the variable and all sub-variables/array keys/sub-objects in the left pane (a GtkTreeView), and the actual values in a list view on the right side.
The class is very easy to use: Just include the file, and call the static display method with the variable you want to have dumped.
Showing a variable with Gtk2_VarDump
//include the file
$myvar = array(
'hello', 2 => 'world',
array(1, 2, 3, 'blubb')
//graphically dump the variable in an own window
Gtk2_VarDump::display($myvar, 'variable title');