tecnica:gps_cartografia_gis:php_mapscript_recipes
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PHP MapScript Recipes
Generate the legend image
We need a mapfile with all the necessary to display the legend.
We can return just the legend image via PHP code. The image can be served as an inline image or as a web image from the temporary directory.
<?php // PHP MapScript example. // Display a map legend as an inline image or embedded into an HTML page. $inline = true; $map_path='/var/www/mapfiles/'; $mapfile = $_REQUEST['mapfile']; $map = ms_newMapObj($map_path . $mapfile); $legend_image = $map->drawLegend(); if ($inline) { header('Content-Type: image/png'); $legend_image->saveImage(''); exit; } $image_url = $legend_image->saveWebImage(); ?> <HTML> <HEAD> <TITLE>PHP MapScript example: Display the legend</TITLE> </HEAD> <BODY> <IMG SRC=<?php echo $image_url; ?> > </BODY> </HTML>
The mapfile requires all the relevant entries, among them: MAP.FONTSET
, MAP.WEB.IMAGEPATH
, MAP.WEB.IMAGEURL
, MAP.LEGEND
.
For inline images you can omit web paths, because no temporary images will be created.
tecnica/gps_cartografia_gis/php_mapscript_recipes.1253109142.txt.gz · Last modified: 2009/09/16 15:52 by niccolo