Say I have this function:

function updateGlobal($newVal) {
  global $myGlobal;
  $myGlobal = $newVal;
}

I will get the following message:

Unused global variable $myGlobal.

It seems like this is an erroneous message. Or at least it should be configurable.

Currently, I'm able to get around the warning this way:

function updateGlobal($newVal) {
  global $myGlobal;
  $myGlobal;
  $myGlobal = $newVal;
}

But this is not ideal.