[Chameleon] zoom to feature

[Geoff MacDonald]

hello,
    I am currently developing an application using mapserver/chameleon. 
I've added a frame for the user to search for an evacuation centre by select menu and show results and update to the database.
 I now want to be able to zoom to the selected feature. The question(s) is as follows: Should I use the
 LocateByAttribute widget or should I use php/MapScript to accomplish this? The LocateByAttribute doesn't
 seem likely since it's only purpose is to zoom, not to query/edit the layer. If I should use php/Mapscript, can I
 see an example to get started? Or even just a good reference to perform what I need to do?
Any and all help would be greatly appreciated
thanks,
    Geoff MacDonald
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