[mapguide-users] Get ID from base64 selectionXML

[Kenneth, GEOGRAF A/S]

 From your notation, I guess that you use PHP.
The ID is Base64 encoded, but it is not a string, it is an integer.
To decode it properly, you must get the bytes (not the string), and 
"transform" it into a 32bit integer.
It is encoded in little endian.
If you search the archives, there was a complete explanation earlier, 
with PHP code.

Regards, Kenneth, GEOGRAF A/S



Jim O'Leary skrev:
> Is there a way to get the ID of a feature that the user has selected on the
> map directly from the selectionXML rather than create a selection object?
>
> I have a toolbar invoke URL button with a key=value pair and the value is
> $CurrentSelection. When the user clicks that button, it sends a URL-encoded
> string to my server-side program, which, decoded, looks like this:
>
> <?xml version="1.0" encoding="UTF-8"?>
> <FeatureSet>
>     <Layer id="88faff12-ffff-ffff-8001-005056c00001">
>         <Class id="SHP_Schema:Parcels">
>             <ID>RiQAAA==</ID>
>         </Class>
>     </Layer>
> </FeatureSet>
>
> Using simplexml, I can extract the value of the ID node in two lines:
>
> $sxe=simplexml_load_string($selectionXML);
> $id = (string)$sxe->Layer->Class->ID;
>
>
> If $id (RiQAAA==) is really base64, I should be able to call 
>
> base64_decode($id);
>
> to get the value of the id, but all I get is F$. What am I missing?
>
> Thanks.
>
>
> -----
> Jim O&#8217;Leary
>
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