[Phpwm] display results on same page

[Phil Beynon]

> Does that work? Whenever I've tried attaching a query string to a URL
> in the action of a form, it has been stripped from the URL...
>
> That was a while ago though, so I might have been doing something
> wrong...
>
> Alex

Yeah it works just fine, be aware of the possibility of users injecting
stupid values in there though.
If the url was incredibly long then there can be 'effects' occasionally.

Phil