Thread:Project:Support desk/Does this code really work??

I saw following code in http://www.mediawiki.org/wiki/Manual:Skinning/Vector

data['loggedin'] ) { ?> /* code to be used only when logged in */ 

My wiki is 1.19.0

I tried to write:

data['loggedin']){ let login user donate; }else{ show Ad Code to Anonymous }?>

But it do not work too! What's wrong??