Description:
------------
The code + results should be pretty self explainatory.

A workaround would be to remove either the reference operator "& getElement" or the error suppression operator "@$this->hash".

PS: I know that using @ instead of isset() is wrong, especially in this situation...

Reproduce code:
---------------
class Foo {
	var $hash;

	function  & getElement($name) {
		return @$this->hash[$name];
	}	

	function bar($a, $b, $c, $d)
	{
		print "BAR: $a, $b, $c, $d<br>";
	}	
}

$f = new Foo();

for ($k = 0; $k < 3; $k++) {
	$t = $f->getElement($k);
	$f->bar(1, 2, 3, 4);
}

Expected result:
----------------
BAR: 1, 2, 3
BAR: 1, 2, 3
BAR: 1, 2, 3

Actual result:
--------------
BAR: 1, 2, 3
BAR: 3, 3, 3
BAR: 3, 3, 3

[If it helps, in PHP 4.1.2 the actual result is:
BAR: 3, 3, 3
BAR: 3, 3, 3
BAR: 3, 3, 3
]