--TEST-- Bug #71028 (Undefined index with ArrayIterator) --FILE-- <?php function cast(&$a) { $a = (int)$a; } $a = new ArrayIterator; $a[-1] = 123; $b = "-1"; cast($b); var_dump(isset($a[$b])); $a[$b] = "okey"; var_dump($a[$b]); unset($a[$b]); var_dump(isset($a[$b])); ?> --EXPECT-- bool(true) string(4) "okey" bool(false)