the key.
&$confstr: reference to a hash key string which can be modified
$user: User (object) requesting the page
+ &$forOptions: array of options the hash is for
'PageViewUpdates': Allow database (or other) changes to be made after a
page view is seen by MediaWiki. Note this does not capture views made
'UploadFormSourceDescriptors': after the standard source inputs have been
added to the descriptor
-$descriptor: (array) the HTMLForm descriptor
+&$descriptor: (array) the HTMLForm descriptor
+&$radio: Boolean, if source type should be shown as radio button
+$selectedSourceType: The selected source type
'UploadVerification': Additional chances to reject an uploaded file. Consider
using UploadVerifyFile instead.