Hide protected content (posts, pages, cpts) from search and archive results

memberpress-hide-protected-content-from-search-archives.php

<?php
// Please note, this is not heavily tested, and may require some tweaking to get to work for your need
// This will also limit results found in the WP REST API as well

// If your result is large (50+ posts for example) - this is likely going to cause some server performance issues
// So I'd recommend using sparingly and remove the MeprRule::is_uri_locked(get_permalink($post) if you're not using any Custom URI Rules in MP

// If a search returns 10 results, but 8 of those are protected, then this will cause only 2 results to come back
// This could be problematic if you're paginating results, as some pages may have posts shown, and others may be completely blank

// And lastly, if your site has heavy object caching enabled, you may get mixed results. This likely will not work with object caching.

function filter_protected_posts_for_mp($posts, $query) {
  if (!class_exists('MeprRule')) { return $posts; }

  foreach ($posts as $key => $post) {
    if (MeprRule::is_locked($post) || MeprRule::is_uri_locked(get_permalink($post))) {
      unset($posts[$key]);
    }
  }

  $posts = array_values($posts);

  return $posts;
}

// Hook the function to the 'posts_results' filter
add_filter('posts_results', 'filter_protected_posts_for_mp', 10, 2);