正如函数名所示，wp_trash_post() 仅垃圾帖子。如果您想将帖子完全删除，则可以使用wp_delete_post( int $postid, bool $force_delete = false ) 相反

https://developer.wordpress.org/reference/functions/wp_delete_post/

当文章和页面被永久删除时，与之相关的所有内容也会被删除。这包括评论、帖子元字段和与帖子相关的术语。

除非禁用垃圾箱、项目已在垃圾箱中或$force\\u delete为true，否则帖子或页面将移至垃圾箱而不是永久删除。

<小时>

EDIT 14.11.2019

也许WP只是发疯了，因为你正在使用wp_trash_post 同样的$post_id 在while 环也许您可以测试以下函数之一，这是我根据您的代码编写的，具体取决于您是要删除单个还是所有匹配的帖子。

function run_every_five_minutes_delete_one_matched_post() {
  global $post;
  if ( empty($post->ID) ) {
    return;
  }
  $wp_query = new WP_Query(
    array(
      \'p\'                      => $post->ID, // query only for this particular post
      \'date_query\'             => array(
        \'after\'                => \'2 hours ago\', 
        \'inclusive\'            => true
      ),
      \'no_found_rows\'          => true,
      \'update_post_meta_cache\' => false,
      \'update_post_term_cache\' => false,
      \'fields\'                 => \'ids\' // no need to query all of the post data
    )
  );
  if ($wp_query->posts) {
    wp_delete_post($post->ID, true); // second parameter true bypasses trash and force deletes the post
  }  
}

function run_every_five_minutes_delete_all_matched_posts() {
  $wp_query = new WP_Query(
    array(
      \'cat\'                    => array(1), 
      \'posts_per_page\'         => -1,
      \'date_query\'             => array(
        \'after\'                => \'2 hours ago\', 
        \'inclusive\'            => true
      ),
      \'no_found_rows\'          => true,
      \'update_post_meta_cache\' => false,
      \'update_post_term_cache\' => false,
      \'fields\'                 => \'ids\'
    )
  );
  if ($wp_query->posts) {
    array_walk($wp_query->posts, function($post_id){
      wp_delete_post($post_id, true); // second parameter true bypasses trash and force deletes the post
    });
  }
}