Feeds für unberechtigte Sperren

// Feed deaktivieren, wenn Benutzer nicht eingeloggt
function feed_error() {
    wp_die( __('Sie müssen sich einloggen, um den RSS-Feed zu sehen!') );
}


function disable_feed($query) {
    if (is_user_logged_in()) {
        if ($query->is_feed) {
            global $wpdb;
            $query->set('cat','-190,-191,-192');
        }
        return $query;
    } else {
        add_action('do_feed', 'feed_error', 1);
        add_action('do_feed_rdf', 'feed_error', 1);
        add_action('do_feed_rss', 'feed_error', 1);
        add_action('do_feed_rss2', 'feed_error', 1);
        add_action('do_feed_atom', 'feed_error', 1);
    }
}
add_filter('pre_get_posts','disable_feed');

function own_feed($query) {
    if ($query->is_feed) {
    //if (is_user_logged_in()) {    
        global $wpdb;
        global $current_user;
        global $post;
        echo '<?xml version="1.0" encoding="UTF-8"?>';
            ?>
            <rss version="2.0"
    xmlns:content="http://purl.org/rss/1.0/modules/content/"
    xmlns:wfw="http://wellformedweb.org/CommentAPI/"
    xmlns:dc="http://purl.org/dc/elements/1.1/"
    xmlns:atom="http://www.w3.org/2005/Atom"
    xmlns:sy="http://purl.org/rss/1.0/modules/syndication/"
    xmlns:slash="http://purl.org/rss/1.0/modules/slash/"
    <?php do_action('rss2_ns'); ?>
>
<channel>
                <title><?php bloginfo_rss('name'); wp_title_rss(); ?></title>
    <atom:link href="<?php self_link(); ?>" rel="self" type="application/rss+xml" />
    <link><?php bloginfo_rss('url') ?></link>
    <description><?php bloginfo_rss("description") ?></description>
    <lastBuildDate><?php echo mysql2date('D, d M Y H:i:s +0000', get_lastpostmodified('GMT'), false); ?></lastBuildDate>
    <?php the_generator( 'rss2' ); ?>
    <language><?php echo get_option('rss_language'); ?></language>
    <sy:updatePeriod><?php echo apply_filters( 'rss_update_period', 'hourly' ); ?></sy:updatePeriod>
    <sy:updateFrequency><?php echo apply_filters( 'rss_update_frequency', '1' ); ?></sy:updateFrequency>
                <?php
                query_posts('cat=-198&posts_per_page=20&orderby=date&order=DESC'); // run the query
    while (have_posts()) : the_post();
        if (group_rights(get_post_meta($post->ID, "group", true), get_the_ID()) == 1) {
        if (sub_group_rights(get_post_meta($post->ID, "sub_groups", true), get_the_ID()) == 1) {
                echo '<item>';
                    echo '<title>'. get_the_title_rss() .'</title>';
                    echo '<description><![CDATA['. trim(get_the_excerpt()) .']]></description>';
                    echo '<link>'. get_permalink($post->ID) .'</link>';
                    ?>
                    <dc:creator><?php the_author() ?></dc:creator>
                    <?php
                    echo '<comments></comments>';
                    echo '<pubDate>'. mysql2date('D, d M Y H:i:s +0000', get_post_time('Y-m-d H:i:s', true), false) .'</pubDate>';
                    the_category_rss();
                    echo '</item>';
                    }
                }
        endwhile;
            echo '</channel>';
        echo '</rss>';
        // Ausgabe des Originalen RSS-Feeds stoppen
        die();
    //}
    }
}
add_filter('pre_get_posts','own_feed');