How to Get Posts from all Blogs in Multisite Network

Now you can run multiple blogs from one installation of WordPress. This new feature is being called Network or Multisite option in WordPress. All you have to open your wp-config.php file located in your WordPress root folder. Then add the following line anywhere in the file:

define('WP_ALLOW_MULTISITE', true);

Find more detail on ” How to enable Multi-Site feature in WordPress 3.0“. After doing this you are able to access the network page from Tools » Network. By default, you are allowed to run other blogs as a subdomain. You can use other domains for blogs by using a Domain Mapping plugin (Detail: How to do Domain Mapping in WordPress Multisite Network).

After converting your WordPress single installation into Multisite Network, you can do some cool things with it. I will see how to get posts from all blogs in the network.

What if you want to get some recent posts from last updated blogs, not only one blog? Then get_last_updated() is the function that will save your life!

See a simple example that shows the last post from last updated blogs:

$blogs = get_last_updated();
echo '
<h1>Last posts in network</h1>
';
foreach ($blogs AS $blog) {
	echo "
<h2>".$blog["domain"].$blog["path"]."</h2>
";
	switch_to_blog($blog["blog_id"]);
		$lastposts = get_posts('numberposts=1');
		foreach($lastposts as $post) :
			setup_postdata($post);
			the_title();
		endforeach;
	restore_current_blog();
}

Reference:

You can read more about WordPress Multisite Network:

These are WordPress Themes, which you can use for your Multi-Site Network because they support BuddyPress and BBPress.

ReviewIt – Community WordPress Theme

ReviewIt provides you with a powerful review and community theme, that is also 100% BuddyPress compatible!

Key Features

2 Unique Skins – Dark and Light
Custom Post Types – Reviews and Slides
Powerful Review System – Utilizes GD Star Rating WordPress plugin (requires PHP 5 )
Easily Change Tags – Switch the site from movies to games, apps or whatever you want
Multiple Review Displays – Display reviews in lists, by score, date, based on similarity to other reviews etc.
Total BuddyPress Support – This theme supports BuddyPress but works just fine without it

Live Preview | Detail

DynamiX – Premium WordPress Theme

Theme features:

Dual Skin Mode
– Inner (Main body content) & Outer (Header / Footer area) Skin can be selected
– Select Skins for the entire website and per page
– Select from 20 Outer Skins and 2 Inner Skins
Non-Post Gallery Slide Manager (Manage all your Gallery Images/Videos in one area)
BuddyPress Theme (BBPress Support)

Live Preview | More Detail

TheAllure – Elegant Corporate and Portfolio Theme

TheAllure is a professional and very flexible WordPress theme packed with amazing functionality and a very impressive Design. The Theme has Unlimited color choices. It is packed with lots of shortcodes and a powerful admin panel (PowerPanel) that lets you control every aspect of your website.
The Allure theme is very easy to set up no matter if you are a WordPress beginner or a WordPress pro.
It is also compatible with WordPress MU (Multisite/wp_mu). It is WPML Translation ready and for your convenience, already includes 19 languages for the frontend.
Key Features

Advanced Admin Panel packed with Options with over 20 sections to help you control every aspect of your website (SelectedTheme’s PowerPanel)
Unlimited Colors
WPML and Translation Ready
19 Languages Available
Cufon Font Replacement with over 25 fonts
Custom Post Types: Portfolio Items, Slider Items
Supports Custom Menus
3 Sliders: Nivo Slider, Thumbnail Slider, Full Content Slider
Fully Flexible Homepage Layout
50+ shortcodes
WordPress Multisite (WordPress_MU) Support

More Detail

Following are the WordPress Plugins which will allow you to share your blog post on Social Networking sites and you can sell your premium content to your blog users:

SocialPress
Sociology for WordPress: Twitter/Facebook Poster