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    I am trying to create a plugin that will only list posts in a category that meet a criteria I’ve defined in an external table.

    So far the admin section has gone ok, I have my list of criteria available to select and assign to posts.

    Now when a category page is displayed I only want to show posts that meet the criteria. So where or how do I intercept the list of posts and filter it before it displays?

    I thought I was onto something yesterday, but I can’t remember it know.

Viewing 5 replies - 1 through 5 (of 5 total)
  • I just read that, it seems a bit cryptic, so here is a bit more of what I’m trying to do.

    I want to set up one blog that displays on many sites. Certain posts will display on one or a few sites, and some will be on all sites.

    So what I’ve done is create a table with the list of sites (by domain) and a table that associates posts with sites.

    What I want to do is have only posts that have been assigned to that site display on that site.

    An example of how this might be used is these 4 domains:


    There may be categories like

    Care & Grooming
    Cute Anecdotes
    Vet Tips

    These four different blogs have the same categories accross them all, but the blog posts wouldn’t be appropriate for all of them all the time.

    A post about how to deal with pet stains in the carpet may be appropriate on all of the blogs, but a post on hairballs may only be appropriate on pets.tld and cats.tld.

    It seems like the_posts hook is where I need to start, I think.

    Well, I’ve figured this out, but it filters posts even in the admin panel. I’ll have to figure that one out.

    add_filter('the_posts', 'my_function' , 1 );
    function my_function( $posts ) {
        // create an array to hold the posts we want to show
        $new_posts = array();
        // loop through all the post objects
        foreach( $posts as $post ) {
            $include = true;
            // Perform Filter comparison
            if ($filterPost>=1) {
                $include = false;
            // if we want to include it then
            // add the post object to the new posts array
            if ( $include === true ) {
                $new_posts[] = $post;
        // send the new post array back to be used by WordPress
        return $new_posts;

    Have you figured this out? I have a similar issue.

    Not quite sure if anyone figured this out, as it was posted 6 months ago but I would suggest the following (even though perhaps a little hacky):


    What this is saying is, if the URL doesn’t contain the standard “wp-admin” part, apply the filter. Otherwise, it won’t filter them. I assume this is what you need? Obviously if you want it filtered on admin but not front end, remove the “!” just before the “strpos”.

Viewing 5 replies - 1 through 5 (of 5 total)
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