function iconUser($user, $type = 0) {

    $row = user($user, $type);

    $url = "/files/avatar/";

    $path = $_SERVER["DOCUMENT_ROOT"] . $url;

    if ($row) {

        $avatar = $path . $row['avatar'];

        if (is_file($avatar))
            $img = $url . $row['avatar'];
        else
            $url . 'no_avatar.png';

    } else {
        $img = $url . 'no_avatar.png';
    }

    return (isset($avatar) && is_file($avatar) ? '
    <div id="avatar'.$row['id'].'" class="modal fade" tabindex="-1">
      <div class="modal-dialog">
        <img src="'.$url . $img.'" alt="avatar" class="img-thumbnail" data-dismiss="modal">
      </div>
    </div>' : '').'
    <img src="/preview/64x64/'.base64_encode($url . $img).'" alt="avatar" class="img-circle" data-toggle="modal" data-target="#avatar'.$row['id'].'">';

}