How can I set attribute values of a layer object with MapScript?
I'm using MapServer version 5.0.3, the php_mapscript.so lib is loaded in my app context
I have a simple Mapfile:
MAP
SIZE 500 500
EXTENT -180 -90 180 90
UNITS dd
CONFIG "CPL_DEBUG" "ON"
CONFIG "MS_ERRORFILE" "/var/www/Data/Data/mapserver/mapserver.log"
SYMBOLSET "/var/www/Data/Data/mapserver/symbols.sym"
FONTSET "/var/www/Data/Data/mapserver/fontset.txt"
#--------------------------------------------------------------------------------
# load lines
#--------------------------------------------------------------------------------
LAYER
NAME "loadlines"
TYPE POLYGON
DATA "/var/www/Data/Data/mapserver/data/loadlines/loadlines.shp"
STATUS ON
OPACITY 100
DEBUG 5
CLASS #default coloring
STYLE
COLOR 0 0 0
WIDTH 6
#PATTERN 40 10 END
END
NAME "gust"
OUTLINECOLOR 254 254 254
COLOR 100 100 100
#OPACITY 50
END
TEMPLATE "blank.html"
DUMP TRUE # allow GML export
PROJECTION
"init=epsg:4326"
END
METADATA
"wms_title" "ffg_test"
"wms_srs" "EPSG:54004 EPSG:4269 EPSG:4326"
END
END
END
Which I want to view by calling this PHP script:
<?php
$map_path="/var/www/Data/Data/mapserver/routeguardTemp/test/";
$map = ms_newMapObj($map_path."loadlines.map");
$layer = $map->getLayerByName('loadlines');
$layer->set('opacity', 10);
$image=$map->draw();
$image_url=$image->saveWebImage();
?>
<HTML>
<HEAD>
<TITLE>Map</TITLE>
</HEAD>
<BODY>
<IMG SRC=<?php echo $image_url; ?> >
</BODY>
</HTML>
The script should alter the opacity value of the layer, but there is no effect.
How can I do this?