我想在我的起始页上显示WordPress多站点中的帖子总数。这是500个博客中的近7000个。所以我做了一个函数，它必须遍历每个博客来统计帖子。当然，这需要很多时间，所以这个函数不是很有用。但是有没有办法说它应该将输出缓存一周？！

这是我的代码：

function posts_count_func( $args ){

    global $wpdb;
    $blogs = $wpdb->get_results( $wpdb->prepare(
            "SELECT * FROM {$wpdb->blogs} WHERE  spam = \'0\' 
            AND deleted = \'0\' AND archived = \'0\' 
            ORDER BY registered DESC, 2", ARRAY_A ) );

    $original_blog_id = get_current_blog_id();

     $args = array(
        \'numberposts\'     => -1,
        \'post_type\'       => \'post\',
        \'post_status\'     => \'publish\' );
    $total_network = $draft_network = 0;
    $total_sites = 0;

    foreach ($blogs as $blog)
    {
        wp_cache_flush();
        switch_to_blog( $blog->blog_id );
        $args[\'post_status\'] = \'publish\';
        if (count(get_posts($args))<2) { continue; }
        $total_posts = count( get_posts( $args ) );
        $total_network += $total_posts;
        $total_sites += 1;

        $args[\'post_status\'] = \'draft\';

        }

 return $total_network;

 switch_to_blog( $original_blog_id );
}
add_shortcode( \'posts\', \'posts_count_func\' );