Rules for global classes/functions ?

Thank you for maintaining this awesome tool ! :)

I did not find resources for this particular case, but maybe there is. If so, I'm sorry for not finding it.

I'm looking for a sniff (or 2 sniffs) that will allow to control the usage of global classes/function.

Lets take for instance Exception class and get_class function.

You could either :

require to import these globals

use Exception;
use function get_class;

get_class($var);
throw new Exception();

require to use trailing backslashes

\get_class($var);
throw new \Exception();