Hello,
The following is a code excerpt I found on the web. Could someone please tell me where I can find information about how to use $$ variables and ${$var} variables. I have never seen them before.

foreach ($expected as $formvar)
$$formvar = (isset(${"_$_SERVER[REQUEST_METHOD]"}[$formvar]))?
   ${"_$_SERVER[REQUEST_METHOD]"}[$formvar]:NULL;