Multisite, sharing content by URL

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I have a network of two sites, A.example.com and B.example.com. I’d like it so that if I create a page on A with a permalink of /Widgets I can access it on B using the same relative permalink but without having to actually create the content on B. (One site has user profiles that we’d like to continue to manage on a single site but expose on the other site, too.) Site B would still “look” like B but the content would come from A.

I was thinking of hooking into init but didn’t really know what to do and the documentation isn’t really helpful. Or would it make more sense to hook into pre_get_posts and just change the table prefix that I’m querying?

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(I know MS isn’t intended for this model and that I’ll have to handle repercussions like links within the content but that’s not a big deal.)

Thanks

[EDIT]

Sorry, /Widget was a bad name probably, these aren’t WordPress Widgets, just regular posts.

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2 comments

  1. Hope I understand you correctly. Not sure if your /Widgets content would be actual widgets, or just posts/pages, but I’ve been using this plugin for duplicating content between sites on a multisite network: http://wordpress.org/extend/plugins/diamond-multisite-widgets/

    Use the “Broadcast on the network” feature. You can select on which sites you’d like to duplicate the content. 2 caveats:

    1. If you create a post on site A, broadcast it, then revise it with “broadcast” featured turned on again, it’ll create a 2nd post on site B. In other words, you can’t broadcast updates. Once the post is copied, it’s totally separate from the original.
    2. Your broadcasted/copied post will be added to “Uncategorized” automatically. Then you go into the 2nd site and assign proper categories to the post.

  2. I ended up going with pre_get_posts.

    add_action('pre_get_posts', 'custom__pre_get_posts');

function custom__pre_get_posts($query){
    //Get access to global variables
    global $blog_id;
    global $wp_query;

    //Make sure we're not in admin, only run on the main query and don't run on our primary site
    if($query->is_admin || !$query->is_main_query() || $blog_id===1){
      return;
    }

    //Try running the query
    $test_obj = $query->get_queried_object();

    //If we didn't get a result then the page wasn't found
    if(!$test_obj){
      //Switch to the main site
      switch_to_blog(1);
      //Reset the query using the same args as the original (the previous reset changes $wpdb)
      $wp_query = new WP_Query($query->query_vars);
      //Re-query the object again. We might need to perform more sanity checks here
      $test_obj = $query->get_queried_object();
      //Switch back to our current site
      restore_current_blog();
      //
    }else{
      //This is a normal query for a page that exists, we don't need to do anything
    }
}