Description:
------------
The script should output '1', but it outputs '0'.
Looks like the assignment is made locally.

But if I replace '$a =& $b' with '$GLOBALS['a'] =& $b'
the script will output '1' (right behaviour)


Reproduce code:
---------------
$b=1;
$a=0;

function f()
{
    global $a,$b;
    
    $a =& $b;
}

f();
echo $a;

Expected result:
----------------
1

Actual result:
--------------
0