code: public function reblogPost($blogName, $postId, $reblogKey, $options = null)
      {
          $params = array('id' => $postId, 'reblog_key' => $reblogKey);
          $params = array_merge($options ?: array(), $params);
          $path = $this->blogPath($blogName, '/post/reblog');
  
          return $this->postRequest($path, $params, false);
      }
docs: Reblog a post
  
  @param string $blogName  the name of the blog
  @param int    $postId    the id of the post
  @param string $reblogKey the reblog key of the post
  @param array  $options   the options for the call
  
  @return array the response array