tmhsiao's Journal: Explain this to me. Win prizes.

In going over some code that I need to put up, I found the following function (names have been changed to protect the ignorant):

function my_uniq_array($myarray){
  $temparray = array_unique($myarray);
  $i=0;
  foreach ($temparray as $value) {
    $new_array[$i] = $value;
    $i++;
  }
  return $newarray;
}

Can someone explain to me why it would be necessary to do such a thing?