[mapserver-users] Simple ItemQuery with QueryMap & php MapScr ipt

[Hankley, Chip]

Nicol...

I'm forwarding this to the MapServer list. On first glance, it looks OK to
me... 

I don't generally create mapfiles on the fly, so, it's hard for me to de-bug
that part of your code... that could be where the problem is. For de-bugging
purposes, I'd first go back and try to do this against a static mapfile. See
if that works, then try to implement it with building the mapfile on-the-fly
like that.

Chip

-----Original Message-----
From: Nicol Hermann [mailto:mapserver at geochem.de]
Sent: Saturday, August 10, 2002 1:39 PM
To: Hankley, Chip
Subject: RE: [mapserver-users] Simple ItemQuery with QueryMap & php
MapScript


Hi Chip,

inspired by your posting in the Mapserver-Newsgroup i try to reproduce 
the 'simple ItemQuery' with PHP-Mapscript.
This works fine till i tryed to get the values of the selected EXPRESSION.

I try the following at the position
// ===> <===
marked in the Script


$numResults = $Layer->getNumResults();
$Layer->open($map->shapepath);

$getDesc = $lyObj->getMetaData("DESCRIPTION");
$selFields = explode(" ", $Layer->getMetaData("RESULT_FIELDS"));

for($j = 0;$j < $numResults;$j++)
{
$oRes = $Layer->getResult($j);
$oShape = $Layer->getShape($oRes->tileindex,$oRes->shapeindex);

$res = $res.'|'.$oShape->values[$selFields[0]];
}

$numResults is 0
so i get nothing back.

Here is my Script so far. Could you please give me an hint or a short 
code snippet what i have to do to get the values.

My setting is:

Mapserver 3.6.1
Debian 3.0
PHP (CGI) 4.2.2

Thank you very much
Nicol

P.S The Script is based on the Shapes from
http://maps.dnr.state.mn.us/mapserver_demos/tests3.5/itemquery/test.html

////////////////////////////
<?

  dl("../php_mapscript.so");

  $serverpfad = "/~nicol/mapserver/itemquery/";
  $verzpfad = "/home/nicol/public_html/mapserver/itemquery/";
  $datapath = "data";
  $data = "county";
  $some_co_value = "Anoka";
  $descr = "Laenderuebersicht";

  $map = ms_newMapObj('') or die('Unable to open mapfile.');

  $nColorId = $map -> addColor(255, 0, 0);
  $nOutLineColor = $map -> addColor(0, 0, 0);
  $nOtherColorId = $map -> addColor(212, 212, 212);

  $map -> web -> set ("imagepath","{$verzpfad}tmp/");
  $map -> web -> set ("imageurl", "{$serverpfad}tmp/");

  $map -> set ("width", 300);
  $map -> set ("height", 300);
  $map -> setExtent(74000,4775000,798000,5499000);

  $Layer = ms_newLayerObj($map);
  $Layer -> set("name","county");
  $Layer -> set("status", 1);
  $Layer -> set("data","{$verzpfad}{$datapath}/$data");
  $Layer -> setMetaData("DESCRIPTION","$descr");
  $Layer -> setMetaData("RESULT_FIELDS","CTY_NAME COUN");

  $Layer -> set("classitem", "cty_name");  // entspr. FILTERITEM im map-File
  $Layer -> set("type", MS_LAYER_POLYGON );

  $poClass = ms_newClassObj($Layer);
  $poClass -> set("color", $nColorId);  // Farbe des gewaehlten Elements
  $poClass -> set("outlinecolor", $nOutLineColor); // Umrissfarbe des
gewaehlten Elements
  $poClass -> set("template", "php_selected.html");
  $poClass -> set("name", "Selektiere Elemente");

  $Object = $Layer->getClass(0);
  $Object -> setexpression($some_co_value);  // entspr. FILTER im map-File

  // ===> <===

  $otherClass = ms_newClassObj($Layer);
  $otherClass -> set("color", $nOtherColorId);
  $otherClass -> set("outlinecolor", $nOutLineColor); // Umrissfarbe der
nicht gewaehlten Elemente
  $otherClass -> set("template", "php_selected.html");
  $otherClass -> set("name", "Nicht selektiere Elemente");

  $img = $map->draw();
  $url = $img->saveWebImage(MS_PNG, $map->transparent, $map->interlace, 50);
  $img->free();

  printf("<p>Referenzkarte: <br> <IMG SRC=%s>\n", $url);

?>