--TEST-- SPL: ArrayIterator --FILE-- <?php $arr = array(0=>0, 1=>1, 2=>2); $obj = new ArrayObject($arr); foreach($obj as $ak=>$av) { foreach($obj as $bk=>$bv) { if ($ak==0 && $bk==0) { $arr[0] = "modify"; } echo "$ak=>$av - $bk=>$bv\n"; } } echo "Done\n"; ?> --EXPECT-- 0=>0 - 0=>0 0=>0 - 1=>1 0=>0 - 2=>2 1=>1 - 0=>0 1=>1 - 1=>1 1=>1 - 2=>2 2=>2 - 0=>0 2=>2 - 1=>1 2=>2 - 2=>2 Done