$parentuser = $xml->getElementsByTagName('users')->item(0);
    $childuser = $parentuser->getElementsByTagName('username');
    $childpass = $parentuser->getElementsByTagName('password');

    for ($i=0; $i<$childuser->length; $i++)
    {
        $curruser->item(i) = $childuser->item(i)->firstChild->data;
    }

$curruser->item(i) = $childuser->item(i)->firstChild->data;