Pressbooks\Catalog::deleteBook PHP Метод

    function deleteBook($blog_id, $for_real = false)
    {
        /** @var $wpdb \wpdb */
        global $wpdb;
        if ($for_real) {
            return $wpdb->delete($this->dbTable, array('users_id' => $this->userId, 'blogs_id' => $blog_id), array('%d', '%d'));
        } else {
            return $wpdb->update($this->dbTable, array('deleted' => 1), array('users_id' => $this->userId, 'blogs_id' => $blog_id), array('%d'), array('%d', '%d'));
        }
    }