problem with array diff, need to reindex array according to key

HI all, I am using the array_diff function. The problem im having is the array that gets returned. Well here's an example: this is where i assign the values to two different arrays $a[]="0"; $a[]="1"; $a[]="2"; $a[]="3"; $b[]="1"; $b[]="4"; $b[]="0"; $diff = array_diff_assoc($a, $b); then compare the arrays print_r ($diff); then print the difference between array $a and $b Array ( [2] => 2 [3] => 3 ) now my problem is that although the values are correct the array it returns, they values have the same keys as the origional array. Now my problem is that I need to get the return array to be reindexed because I want to loop through it from element 0 till count($diff). How do I reindex the returned array by key, to accomplish the above. thanks in advance -- Angelo Zanetti