Artikel Loop ohne "privat" Kennzeichnung

function derLoop($atts, $content = null) {
    extract(shortcode_atts(array(
        "pagination"    => 'true',
        "query"            => '',
        "category"        => '',
    ), $atts));
    global $wp_query,$paged,$post;
    $temp = $wp_query;
    $wp_query= null;
    $wp_query = new WP_Query();
    if($pagination == 'true'){ $query .= '&paged='.$paged; }
    if(!empty($category)){ $query .= '&category_name='.$category; }
    if(!empty($query)){ $query .= $query; }
    $query .= '&post_status=publish';
    $wp_query->query($query);
    ob_start();
?>
<h2><?php echo $category; ?></h2>
<ul class="loop">
<?php while ($wp_query->have_posts()) : $wp_query->the_post(); ?>
<li><?php echo get_the_date( 'd.m.Y' ); ?><br><a href="<?php the_permalink() ?>" rel="bookmark"><?php echo $thumbnail_image; the_title(); ?></a></li>
<?php endwhile; ?>
</ul>
<?php if($pagination == 'true'){ ?>
<div class="navigation">
<div class="alignleft"><?php previous_posts_link('« zur&uuml;ck') ?></div>
<div class="alignright"><?php next_posts_link('weiter »') ?></div>
</div>
<?php } ?>
<?php $wp_query = null; $wp_query = $temp;
    $content = ob_get_contents();
    ob_end_clean();
    return $content;
}