problems with ms_newClassObj

[Daniel Morissette]

Dieter Lehmann wrote:
> 
> Hi there,
> I get stuck using mapscript/php3. With my attached code I get an "document
> contains no data".
> Think, something is wrong with the Class-definition.
> (using only the map-file without the definitions of a class everything is o.k.).
> 

Dieter,

I tried your script and .map file using PHP3 and recent versions (about
1 week old) of MapScript on Linux and Win98, and in both cases it passes
the classes part, but returns the following error:

Fatal error: MapServer Error in msDrawMap(): Image dimensions not
specified. in ex1.phtml on line 16

... that's because your .map file is missing important parameters like
EXTENTS, SIZE, and a WEB object.

However, I don't think that explains your crash... because "Document
contains no data..." means that the server crashed without generating
any output.  How old is your PHP/MapScript DLL (or .so) ?  It might be a
good idea to get a more recent one... either compiling the latest
nightly build on Unix, or if you're on Windows there is a recent
precompiled PHP3_MAPSCRIPT.DLL that you can download at 
http://www2.dmsolutions.ca/mapserver/dl/ms_3.4pr-win32-ogr-php3-20010103.zip

BTW, setting colors the way you did in the classes would not give the
expected results... the color parameter in a class object in a .map file
is the RGB value, but in MapScript it is a color index obtained from
addColor().  So the following lines in your script:

> $poClass->set("color",255, 0, 0);
> $poClass->set("outlinecolor",255,0,0);
> 

Should be replaced with:

  $poClass->set("color", $map->addColor(255, 0, 0) );
  $poClass->set("outlinecolor", $map->addColor(255, 0, 0) );

Good Luck!
-- 
------------------------------------------------------------
 Daniel Morissette                morissette at dmsolutions.ca
                 http://www.dmsolutions.ca/
------------------------------------------------------------
  Don't put for tomorrow what you can do today, because if 
      you enjoy it today you can do it again tomorrow.