Outdated or Confusing Information on What References Are Not

From manual page: https://php.net/language.references.arent

The information on the mentioned page seems outdated or at least very confusing:

<?php
function foo(&$var)
{
    $var =& $GLOBALS["baz"];
}
foo($bar); 
?>

There's no way to bind $bar in the calling scope to something else using the reference mechanism, since $bar is not available in the function foo (it is represented by $var, but $var has only variable contents and not name-to-value binding in the calling symbol table).

You coud just use $GLOBALS["bar"] =& ... Unless I am misunderstanding something, for which I would apoligise, the problem of $bar not being available would only be the case if the defined function would be itself in another function scope. I am also unsure what is meant by

but $var has only variable contents and not name-to-value binding in the calling symbol table

as it is a reference, first to $bar and then to global $baz. This part is probably meant to make the distinction between references and c pointers clear?

Start with the language.references.arent manual page and read the quoted example alongside its explanation. Verify what the example says about references, $bar, $var, and $GLOBALS, then revise the passage so the behavior and terminology are accurate and understandable. Done means the example and surrounding explanation are no longer outdated or confusing.