Often, when using WordPress multisite as a content management system rather than a blog network, I have the need to use a blog slug in image paths, or when doing DB queries or whatever. There are lots of reasons, but here’s how you get it >

// This is one way
$blog_details =  get_blog_details($GLOBALS['blog_id']);
$slug = str_replace('/','',$blog_details->path);
echo $slug;

// This way makes more sense to me since there's already a global $var for the path
$slug = str_replace('/','',$GLOBALS['path']);
echo $slug;

I find the $GLOBALS variable to be really useful. If you’d like to see all the stuff you can get out of there, just drop this line in your theme somewhere (it’s quite long, so best not to do it on a production site)-

print_r($GLOBALS);

Enjoy!

One thing I didn’t realize however was that (at the moment) it only works on posts published AFTER you start using it. If you’re like me you have 100s or 1000s or even more posts already in your network.

I stumbled across some code the other day that will iterate through your blogs and pull the existing posts into the new tags blog. So Colas Nahaboo, whoever you are, thanks for this awesome bit of code:

$posts = $wpdb->get_col( "SELECT ID FROM $wpdb->posts WHERE post_status = 'publish'" );
if ( !empty($posts) ) {
    foreach ( $posts as $post ) {
        if($post != 1 && $post != 2)
            sitewide_tags_post($post, get_post($post));
    }
}

The easy thing to do, is using the WPMU Power Tools plug-in, from Brian Freeman, run the above query exactly as it is across all blogs and within a few seconds all of your posts will be pulled in. Easy!

Thanks to Andrea and Donncha for tips over the past few days, I always appreciate the help.

For someone like me though, who is implementing a WordPress Mu site using “blogs” as content sections instead of the traditional community of blogs, I’d like to be able to have breadcrumbs that go more like this-

Home (root uri) » Blog Home (blog uri) » normal breadcrumbs

To accomplish this, I just made a few modifications to Dimox’s code and with the power of WordPress, Shazam!, it was done.

Here’s the chunk of code I added/modified (note, this code goes in your themes’ functions.php file):

// change the value of $home to your site's root URI (first level in the breadcrumbs)
$home = 'http://foo.com/';

// add two new variables for your blog info (second level in the breadcrumbs)

$blogURI = get_bloginfo('url');
$blogName = get_bloginfo('name');

// directly above the first line of code below in the original source, add the second row that references the new vars you've created  (for good measure I also nofollowed the home URI)

echo '<a href="' . $home . '" rel="nofollow">' . $name . '</a> ' . $delimiter . ' ';
/* if blog is home blog, don't display the blog name */
if ($blog_id != 1) {	echo '<a href="' . $blogURI . '">' . $blogName . '</a> ' . $delimiter . ' '; }

And that’s it, now just do everything else as Dimox suggests on his site.

Enjoy!