[mapguide-users] MGOS 4 Final Release and GetLayers

[Gordon Luckett]

I would be curious about the line:

$this->MapGuideObject->getMap();

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On Mon, May 25, 2026 at 1:35 PM David Bowen via mapguide-users <
mapguide-users at lists.osgeo.org> wrote:

> We're updating our application from using an MVC framework to being a PHP
> only application. We're getting an unexpected error when running a spatial
> query that looks for corresponding data, from a specified layer, that falls
> within a set distance of the geocoded coordinates. This function worked as
> expected in the MVC framework and the only code change, for this section of
> code, is how the MG_initialize library is loaded.
>
> Going through the function step-by-step, it appears that it's failing when
> it attempts to retrieve the layers from MapGuide. Instead of returning
> something, it's returning NULL. This triggers a Fusion error, where 1 of 2
> different error messages are displayed.
>
> The first error message is:
> Failed to retrieve message for "MgFileNotFoundException". Failed to
> retrieve message for "MgFileIoErrNo". - MgInitializeWebTier line 155 file
> C:\Workspace\mg-4.0\MgDev\Web\src\WebSupport\InitializeWebTier.cpp -
> MgInitializeWebTierInternal line 116 file
> C:\Workspace\mg-4.0\MgDev\Web\src\WebSupport\InitializeWebTier.cpp -
> MgResources.LoadResources line 388 file
> C:\Workspace\mg-4.0\MgDev\Common\Foundation\System\Resources.cpp -
> MgResources.ParseFile line 632 file
> C:\Workspace\mg-4.0\MgDev\Common\Foundation\System\Resources.cpp -
> ByteSourceFileImpl.LoadFile line 127 file
> C:\Workspace\mg-4.0\MgDev\Common\Foundation\System\ByteSourceFileImpl.cpp
>
> The second error message is:
> Fatal error: Uncaught TypeError: extract(): Argument #1 ($array) must be
> of type array, string given in PATH\map\view\page.php:116 Stack trace: #0
> PATH\map\view\page.php(116): extract() #1
> PATH\maptools\sel_action.php(154): require_once('...') #2
> PATH\maptools\sel_action.php(56): Sel_Action->selectionReport_ql() #3
> PATH\maptools\sel_action.php(290): Sel_Action->__construct() #4 {main}
> thrown in PATH\map\view\page.php on line 116
>
> The script is:
> function __construct( $config ) {
>         $mapName = $config[ 'mapname' ];
>         $mgSessionID = $config[ 'mapsession' ];
>         $this->mgMapID = $mapName;
>         $this->mgSessionId = $mgSessionID;
>         //Initialize a MapGuide object instance
>         require_once('../library/mapguide/Mg_initialize.php');
>         $this->MapGuideObject = new Mg_initialize();
>         $this->MapGuideObject->init( $this->mgMapID, $this->mgSessionId );
> }
>
> function getSelection() {
> $myMap = $this->MapGuideObject->getMap();
>         $session = $this->mgSessionId;
>         $mapName = $this->mgMapID;
>         $objkeys = '';
>         $errorMsg = null;
>         $siteConnection = $this->MapGuideObject->getSiteConnection();
>         // Get an instance of the Resource and Mapping Services and use
> them to open the map and initialize a selection object.
>         $resourceSrvc = $this->MapGuideObject->getResourceService();
>         $featureSrvc = $this->MapGuideObject->getFeatureService();
>         //Get selected map layers.
>         $sel = new MgSelection( $myMap );
>         $sel->Open( $resourceSrvc, $mapName );
>         $this->originalSel = $sel->ToXml();
>         // this is where it appears to fail
>         $selLayers = $sel->GetLayers();
>
> //script continues but likely not relevant
> }
>
> Any input would be greatly appreciated.
> _______________________________________________
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> mapguide-users at lists.osgeo.org
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>
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