WordPress.org

This plugin is only compatible with WPMU 2.8+! Donncha's Sitewide Tags plugin is required as well.

1. Drop the plugin file (sitewide-tag-suggestion.php) into mu-plugins/

2. Open wp-admin/admin-ajax.php. (Back it up first! You're hacking the core!) Find the line that says case 'add-comment' : Add the following stuff, making sure to change the number following 'blog_id' => to the numerical blog id of your Sitewide Tags blog.

   // Additions for sitewide tag suggestions begin here
   
   case 'get-tagcloud2' :
   if ( !current_user_can( 'edit_posts' ) )
       die('-1');
   
   if ( isset($_POST['tax']) )
       $taxonomy = sanitize_title($_POST['tax']);
   else
       die('0');
   
   $tags = get_terms_custom( $taxonomy, array( 'number' => 45, 'orderby' => 'count', 'order' => 'DESC', 'blog_id' => 28 ) );
   
   if ( empty( $tags ) )
       die( __('No tags found!') );
   
   if ( is_wp_error($tags) )
       die($tags->get_error_message());
   
   foreach ( $tags as $key => $tag ) {
       $tags[ $key ]->link = '#';
       $tags[ $key ]->id = $tag->term_id;
   }
   
   // We need raw tag names here, so don't filter the output
   $return = wp_generate_tag_cloud( $tags, array('filter' => 0) );
   
   if ( empty($return) )
       die('0');
   
   echo $return;
   
   exit;
   break;
   
   // End additions
   

3. Open wp-admin/edit-form-advanced.php. (Have you backed it up yet?) Find the line that says

">

First, if you'd like to change this line's text to more clearly distinguish between the current blog's tags and the sitewide tags, you might consider replacing that line with the following:

">

After that line, add the following markup, which creates a link for your sitewide tags. You'll want to change my link text ("...all Commons blogs") to reflect your own site:

">

*/