Cómo mostrar publicaciones globales recientes en wordpress multisitio

Ejecuto un multisitio de wordpress en ayp.no y estoy tratando de encontrar una manera de presentar todos los subsitios con logotipos y publicaciones recientes de todos los blogs. Sé que hay un complemento premium de wpmudev para esto, pero esperaba que hubiera algo de codificación. podría hacerlo yo mismo (bueno, obviamente no yo mismo, pero al menos pregunta aquí y verás).

Primero, necesitamos un función para obtener todos los sitioscon eso a mano, iteramos el conjunto de sitios y extraemos la información con wp_get_recent_posts() (que es una versión personalizada de get_posts()).

Utilice lo siguiente como Debe usar el complementoentonces la función b5f_print_recent_posts() está disponible en toda la red:

<?php
/**
 * Plugin Name: Recent Network Posts
 * Plugin URI: http://stackoverflow.com/q/23713801/1287812
 * Description: Creates a function that lists recent posts from all sites of the network. Call it in another plugins or themes.
 * Author: brasofilo   
 */

/**
 * Iterates throught all sites of the network and grab the recent posts
 */
function b5f_print_recent_posts()
{
    $blogs = b5f_get_blog_list( 0, 'all', true );
    $current_blog_id = get_current_blog_id();
    foreach( $blogs as $blog ) 
    {
        switch_to_blog( $blog[ 'blog_id' ] );
        echo '<h3>' . $blog['name'] . ' - ' . $blog['domain'] . ' - ' . $blog['desc'] . '</h3>';
        $posts = wp_get_recent_posts( array(), OBJECT );
        if( $posts )
        {
            foreach( $posts as $post )
            {
                printf(
                    '- <a href="https://stackoverflow.com/questions/23713801/%s">%s</a><br />',
                    get_permalink( $post->ID ),
                    $post->post_title
                );
            }
        }
    }
    switch_to_blog( $current_blog_id );
}

/**
 * Returns an array of arrays containing information about each public blog 
 * hosted on this WPMU install.
 * 
 * Only blogs marked as public and flagged as safe (mature flag off) are returned.
 *
 * @author Frank Bueltge
 * 
 * @param   Integer  The first blog to return in the array.
 * @param   Integer  The number of blogs to return in the array (thus the size of the array).
 *                   Setting this to string 'all' returns all blogs from $start
 * @param   Boolean  Get also Postcount for each blog, default is False for a better performance
 * @param   Integer  Time until expiration in seconds, default 86400s (1day)
 * @return  Array    Returns an array of arrays each representing a blog. 
 *                   Details are represented in the following format:
 *                       blog_id   (integer) ID of blog detailed.
 *                       domain    (string)  Domain used to access this blog.
 *                       path      (string)  Path used to access this blog.
 *                       postcount (integer) The number of posts in this blog.
 *                       name      (string) Blog name.
 *                       desc      (string) Blog description.
 */
function b5f_get_blog_list( $start = 0, $num = 10, $details = FALSE, $expires = 86400 ) {

    // get blog list from cache
    $blogs = get_site_transient( 'multisite_blog_list' );

    // For debugging purpose
    if ( defined( 'WP_DEBUG' ) && WP_DEBUG )
        $blogs = FALSE;

    if ( FALSE === $blogs ) {

        global $wpdb;

        // add limit for select
        if ( 'all' === $num )
            $limit="";
        else
            $limit = "LIMIT $start, $num";

        $blogs = $wpdb->get_results(
            $wpdb->prepare( "
                SELECT blog_id, domain, path 
                FROM $wpdb->blogs
                WHERE site_id = %d 
                AND public="1" 
                AND archived = '0' 
                AND mature="0" 
                AND spam = '0' 
                AND deleted = '0' 
                ORDER BY registered ASC
                $limit
            ", $wpdb->siteid ), 
        ARRAY_A );

        // Set the Transient cache
        set_site_transient( 'multisite_blog_list', $blogs, $expires );
    }

    // only if usable, set via var
    if ( TRUE === $details ) {

        $blog_list = get_site_transient( 'multisite_blog_list_details' );

        // For debugging purpose
        if ( defined( 'WP_DEBUG' ) && WP_DEBUG )
            $blog_list = FALSE;

        if ( FALSE === $blog_list ) {

            global $wpdb;
            $current_blog_id = get_current_blog_id();
            foreach ( (array) $blogs as $details ) {
                $blog_list[ $details['blog_id'] ] = $details;
                $blog_list[ $details['blog_id'] ]['postcount'] = $wpdb->get_var( "
                    SELECT COUNT(ID) 
                    FROM " . $wpdb->get_blog_prefix( $details['blog_id'] ). "posts 
                    WHERE post_status="publish" 
                    AND post_type="page"" 
                );
                switch_to_blog( $details['blog_id'] );
                $blog_list[ $details['blog_id'] ]['name'] = get_blog_details()->blogname;
                $blog_list[ $details['blog_id'] ]['desc'] = get_bloginfo( 'description' );
            }
            switch_to_blog( $current_blog_id );
            // Set the Transient cache
            set_site_transient( 'multisite_blog_list_details', $blog_list, $expires );
        }
        unset( $blogs );
        $blogs = $blog_list;
    }

    if ( FALSE === is_array( $blogs ) )
        return array();

    return $blogs;
}

Puede agregar el siguiente widget de panel de red en el complemento anterior para probarlo:

add_action( 'wp_network_dashboard_setup', 'dashboard_setup_so_23713801' );

function dashboard_setup_so_23713801() 
{
    wp_add_dashboard_widget( 'widget_so_23713801', __( 'Test widget' ), 'print_widget_so_23713801' );
}

function print_widget_so_23713801() 
{
    b5f_print_recent_posts();
}