The description in the book reads:
$_SERVER[‘QUERY_STRING’] – The current scripts path
This description is the same as the entry above, because I made a bad edit (copy/paste for formatting). The correct description would be as follows:
$_SERVER[‘QUERY_STRING’] – The current query string (without the question mark)
The example is correct and accurate, and luckily this is painfully obvious thanks to the name of the key QUERY_STRING in the $_SERVER array.