[Mapserver-users] Making layers in php mapscript

[Marcel Koopman]

Hello,

I cant get php mapscript to create (and show) a layer.
But i want to make layers in php mapscript, instead of retrieving the ones defined in the mapfile.

Here's one layer i have defined in a mapfile:

/**********************************************************************\
  LAYER
    GROUP		"std"
    CONNECTIONTYPE	postgis
    NAME        	nstudenten
    CONNECTION		"user=postgres dbname=testdb"
    DATA        	"the_geom from gem_gron_poly"
    STATUS       	off
    TYPE         	POLYGON    
    TEMPLATE	 	"templates/nstudenten.html"
    HEADER 		"templates/nstudenten_header.html"
    FOOTER 		"templates/nstudenten_footer.html"     
    DUMP TRUE
    
    PROJECTION
      "init=epsg:28992"
    END
    
    CLASS 
      NAME "Aantal studenten 0 - 100"
      EXPRESSION ([N_STUDENTEN_ROC] >0 AND [N_STUDENTEN_ROC] <= 100)
      COLOR 217 217 255      
    END
    
    
    CLASS
      NAME "Aantal studenten 100 - 500"
      EXPRESSION ([N_STUDENTEN_ROC] >100 AND [N_STUDENTEN_ROC] <= 500)
      COLOR 177 177 255           
    END
    

    CLASS
      NAME "Aantal studenten 500 - 1000"
      EXPRESSION ([N_STUDENTEN_ROC] >500 AND [N_STUDENTEN_ROC] <= 1000)
      COLOR 136 136 255      
     
    END
    

    CLASS
      NAME "Aantal studenten > 1000"
      EXPRESSION ([N_STUDENTEN_ROC] >1000)
      COLOR 75 75 255      
    END

  END     
/**********************************************************************\

So, this is my php code (groningen-php.map has no layers, i define a new one here in php-mapscript):

-----------------------------------------------------------------------------
$map_path="/var/www/groningen/";		
$map = ms_newMapObj($map_path."groningen-php.map");
	
$layer = ms_newLayerObj($map);
$layer->set(name, $naam);	
$layer->set(connectiontype, "postgis");
$layer->set(connection, "user=postgres dbname=testdb");
$layer->set(data, "the geom from gem_gron_poly");
$layer->set(type, MS_POLYGON);
$layer->set(status, MS_ON);	
	
$class = ms_newClassObj($layer);	
$class->set(name, "nstudenten");
$class->setexpression("[N_STUDENTEN_ROC] >0 AND [N_STUDENTEN_ROC] <= 100");
	
$style = ms_newStyleObj($class);
$style->color->setRGB(10,100,10);
		
	
$layer_img = $map->prepareimage();
$i = $layer->draw($layer_img);
echo $i;
	
$layer_url = $layer_img->saveWebImage();
echo "<img src='$layer_img'>";
-----------------------------------------------------------------------------

I cant get a normal image from mapserver. What am i missing?

Thanks for your help.