Class Names not saved?

[Lowell Filak]

The following message was sent by Ben Loh <ben at inquirium.net> on Fri, 2
Sep 2005 10:15:50 -0500.

> At 9:48 a -0400 9/2/05, Lowell Filak wrote:
> >
> >  > <?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?
> >>  }
> >>
> >>  ?>
> >
> >Ben,
> >
> >I'm not sure where in your code you change $a to 'Replaced Name' before
> >running the 2nd $map->getLayerByName($a)?
> >If $a is not changed, aren't you asking for $map->getLayerByName("Orig
> >Class Name")?
> >
> >Lowell
> 
> 
> Hi Lowell,
> 
> Thanks for answering.
> 
> Hmm...maybe I'm missing something about the way that mapscript works. 
> $a refers to the layer names.  So $a is being set in the "foreach..." 
> calls.  I then loop through the layers, setting $theLayer to each 
> layer in turn.
> 
> I'm setting the name of the classes in the line $baseClass->name = 
> 'Replaced Name';.  The $baseClass is being retrieved from the layer 
> by the line $baseClass  = $theLayer->getClass( 0 );.
> 
> So if I grab a layer, then grab a class, then change the name of the 
> class, am I working with a reference to the actual class, or am I 
> somehow working with a copy of the class?  Is this the source of my 
> problem?
> 
> Thanks,

Ben,

I believe you're working with the layer with the changed name up until
the point when the code re-selects the layer based on the old name. But
I could be missing something in the code.

Lowell