In PHP, can we use a global variable and local variable in the same scope together?

Is it possible to use a global variable and local variable (with the same name) in the same scope? Suppose we have,

<?php
include "example.php";
function foo($bar) {
    global $bar;
    ------------
    ------------
}
?>

How can we access both $bar (global and local) in the same scope, is there any way?