Class Names not saved?

[Ben Loh]

Hi,

I'm putting together a historical map application for high 
school/college level students and am running into some problems with 
setting class names.

Perhaps I'm missing something obvious, but here's what's happening: 
I want to dynamically create classes for a given map (In the full 
app, I create classes, for the test app, I'm just changing an 
existing class).  So, I read in the map, get the layer, and set the 
class name to a new name.  Everything looks fine until I try to get 
the class name from the layer again: the class name reverts to the 
default name defined in the .map file!  Is this some kind of 
referencing problem that I'm overlooking?  Any help would be much 
appreciated.

Thanks!

Ben


Here's a snippet of my map file:
============================================================
LAYER
	NAME	"PersonSqK"
	DATA	states1790
	STATUS	ON
	TYPE	POLYGON

	CLASS
		NAME "Orig Class Name"
		EXPRESSION ([PERSONSSQK] <= 305)
		STYLE
			COLOR			255 255 255
			OUTLINECOLOR		153 153 153
		END #STYLE
	END #CLASS

END #LAYER



And here's some test code to generate the error:
============================================================
<?php
dl('php_mapscript.so');

function dbgout( $text ) { echo $text.'<br>'; }

$map = ms_newMapObj( 'classtest.map' );

$allLayers  = $map->getAllLayerNames();
foreach($allLayers as $a) {
     $theLayer =  $map->getLayerByName($a);

     $baseClass  = $theLayer->getClass( 0 );
     dbgout( 'baseClass default name = '.$baseClass->name);
     // This displays:  "Orig Class Name"

     // Try setting the name to something new
     $baseClass->name = 'Replaced Name';
     dbgout( 'baseClass changed name = '.$baseClass->name);
     // This displays:  "Replaced Name", so far everything is fine.

}

foreach($allLayers as $a) {
     $theLayer =  $map->getLayerByName($a);

     $baseClass  = $theLayer->getClass( 0 );
     dbgout( 'baseClass reread name = '.$baseClass->name);
     // This displays:  "Orig Class Name"!!!!  Where did the replaced name go?
}

?>


You can test this on my server: 
http://benloh.com/hmapstaging/projects/1790/classtest.php
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