您可以简单地运行foreach 循环并从返回的术语数组中排除术语。只是一些注释

• cat 接受字符串或整数值，不接受and数组

• category__not_in 应为数组

  这是我最近做的一个相关帖子功能的修改版本here. 请去看看，看看$args 应使用参数，请记住，它已移动到新函数中的第三个参数；-）

  下面是代码（我对代码进行了注释，因此您可以按照它进行操作，但它未经测试，需要PHP 5.4+）

  function get_related_posts( $taxonomy = \'\', $exclude = [], $args = [] )
  {
      /*
       * Before we do anything and waste unnecessary time and resources, first check if we are on a single post page
       * If not, bail early and return false
       */
      if ( !is_single() )
          return false;
  
      /*
       * Check if we have a valid taxonomy and also if the taxonomy exists to avoid bugs further down.
       * Return false if taxonomy is invalid or does not exist
       */
      if ( !$taxonomy ) 
          return false;
  
      $taxonomy = filter_var( $taxonomy, FILTER_SANITIZE_STRING );
      if ( !taxonomy_exists( $taxonomy ) )
          return false;
  
      /*
       * We have made it to here, so we should start getting our stuff togther. 
       * Get the current post object to start of
       */
      $current_post = get_queried_object();
  
      /*
       * Get the post terms
       */
      $terms = get_the_terms( $current_post->ID, $taxonomy );
  
      /*
       * Lets only continue if we actually have post terms and if we don\'t have an WP_Error object. If not, return false
       */
      if ( !$terms || is_wp_error( $terms ) )
          return false;
  
      // Define our array to hold the term id\'saveHTML
      $term_ids = [];
      foreach ( $terms as $term ) {
          // Check if we have terms to exclude and exclude them
          if ( $exclude ) {
              if ( in_array( $term->id, $exclude ) )
                  continue;
          } else {
              $term_ids[] = (int) $term->term_id;
          }
      /*
       * Set the default query arguments
       */
      $defaults = [
          \'post_type\' => $current_post->post_type,
          \'post__not_in\' => [$current_post->ID],
          \'tax_query\' => [
              [
                  \'taxonomy\' => $taxonomy,
                  \'terms\' => $term_ids,
                  \'include_children\' => false
              ],
          ],
      ];
  
      /*
       * Validate and merge the defaults with the user passed arguments
       */
      if ( is_array( $args ) ) {
          $args = wp_parse_args( $args, $defaults );
      } else {
          $args = $defaults;
      }
  
      return $q;
  }
  

  那么您可以按如下方式使用它

  if ( function_exists( \'get_related_posts\' ) ) {
      $related_posts = get_related_posts( 
          \'my_taxonomy_name\', // Taxonomy name, if build in, in should be \'category\'
          [1, 2, 3] // Array of terms to exclude
      );
      if ( $related_posts ) {
          foreach ( $related_posts as $post ) {
              setup_postdata( $post ); 
              // Use your template tags and html mark up as normal like
              the_title();
              the_content();
              // etc etc
          }
          wp_reset_postdata();
      }
  }