How to display recent global post in wordpress multisite - php

Question

I run a wordpress multisite on ayp.no and I am trying to figure out a way to present all subsites with logos and recent posts from all blogs, I know there is a wpmudev premium plugin for this, but I was hoping there was some coding i could do myself (well, obviously not myself, but at least ask here and see)..

Answer 1

First, we need a function to get all sites, with that at hand we iterate thought the array of sites and pull the information with wp_get_recent_posts() (which is a customized version of get_posts()).
Use the following as a Must Use plugin, so the function b5f_print_recent_posts() is available throughout the network:
<?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(
'- %s<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;
}
You can add the following network dashboard widget in the previous plugin to test it out:
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();
}