Rectangular abels with border and rounded corners?

[Dave Pearson]

Is it possible (using php-mapscript if necessary) to persuade mapserver to 
produce rectangular labels with rounded corners, and a border which goes all 
the way around the label?
I have tried various permutations using the default labelling commands, and 
can get for example red text on a white background, but I can't figure out 
how to make a continuous red border.
Is it possible that the technique used to make a highway shield under a 
number could be extended such that a background would "stretch" to fit 
behind variable length text, like in an IMG in HTTP?
Many thanks,
Dave Pearson

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