[MS4W-Users] transparency with php mapscript

Jeff McKenna jmckenna at gatewaygeomatics.com
Thu May 16 07:57:53 EDT 2019

I forgot to mention that that test script uses an important trick to 
test: it saves the mapfile to a temporary file, where you can confirm 
that a COMPOSITE object is indeed created (here is that script again 
https://ms4w.com/trac/wiki/SWIGMapScriptOpacity )



Thank you for using MS4W.
"MS4W: open doors as well as windows"

Jeff McKenna
MapServer Consulting and Training Services

On 2019-05-16 8:42 AM, Jeff McKenna wrote:
> Hi Sven,
> As you know, all methods and functions are now listed in the SWIG API 
> reference document when using MS4W 4.0, and in the layerObj methods 
> section you can see a setOpacity() function 
> (https://mapserver.org/mapscript/mapscript.html#layerobj-methods).
> Another trick is to open the local included file 
> "C:/ms4w/apps/phpmapscriptng-swig/include/mapscript.php" in your text 
> editor and search for "opacity" or "setOpacity" there, just to confirm 
> with your local installation of MS4W.
> Recently another MS4W user asked about opacity, so I had created a test 
> script showing setOpacity() in action with SWIG MapScript: 
> https://ms4w.com/trac/wiki/SWIGMapScriptNewLayer
> However, I admit that that example script is long and opacity is kind of 
> hidden in the code, so I have created another example for you at: 
> https://ms4w.com/trac/wiki/SWIGMapScriptOpacity which takes an existing 
> layer and adds a COMPOSITE object with the command:
>    // set opacity (actually creates a new COMPOSITE object)
>    $oPolyLayer->setOpacity(40);
> I hope that makes it more clear.
> -jeff

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