CLASS and php/mapscript

[Luca Casagrande]

Hi to all!
I am trying to create a new layer using php/mapscript; the problem is for the class section:
this is the mapfile sample i'd like to crete:

CLASS
    EXPRESSION "1"
    STYLE
      COLOR -1 -1 -1
    END
   END

And this is the mapscript i have written:
        
        $class = ms_newClassObj($layer);
	$class->setExpression("'[pixel]' EQ '1'");

	$style = ms_newStyleObj($class);
        $style->color->setRGB( -1,-1,-1);

Debugging the mapfile, the CLASS it's been created, but not the style of the class.

Thanks very much
Luca
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