[PHP/MapScript]: How to change size of query map

[Sebastian Albrecht]

Hello everybody,

how can I change the size of a query map in my PHP/Mapscript 
application. I would like to query multiple features and generate a list 
of small query map images for every feature.

In the doc there's a querymapObj described but no method or way to get 
it from the current mapObj.

Is there another way to change the size of the query map except changing 
the map file or using a second map file?

Best regards

Sebastian