显示当前上级类别的帖子，右侧显示下级类别帖子

我有分类菜单，如果打开分类。左侧的php仅显示当前父类别的帖子，右侧的php显示子类别帖子。

如果我有两个类别。A是B的父母，B是孩子。

在左侧只想显示所有帖子的一个，右侧只想显示帖子的一个。

这两个操作应在同一模板上执行。

<?php
/**
/* Template Name: Second-page-temp */
get_header();
?>

<div class="container main-in-section">
    <div class="row">
        <div class="col-sm-8">
            <div class="row in-sec-left-bansec">


                <?php
                // Display optional category description
                if ( category_description() ): ?>

                <div class="in-sec-banner">

                    <?php echo category_description(); ?>
                </div>
                <?php endif; ?>

            </div>
            <div class="row in-main-sec-post">
                <h4>Latest Post</h4>

                <?php
                // The Loop
                while ( have_posts() ): the_post();
                ?>


                <div class="col-sm-4">

                    <a href="<?php the_permalink();?>">
                        <div class="in-section-post-title">
                            <div class="bolg-img">
                                <?php the_post_thumbnail(); ?>
                            </div>
                            <h5>
                                <?php echo substr(get_the_title(), 0,18); ?> ...</h5>
                            <p>
                                <?php echo substr(get_the_content(), 0,70); ?> ...</p>

                            <h6> <img src="<?php bloginfo(\'template_url\'); ?>/images/date-icon.jpg"> <?php the_time(\'l, F jS, Y\') ?> <span> <img src="<?php bloginfo(\'template_url\'); ?>/images/view-icon.jpg"> <?php the_field(\'review\'); ?> </span></h6>
                        </div>
                    </a>

                </div>


                <?php endwhile; wp_reset_query(); ?>


            </div>
        </div>


        <div class="col-sm-4 right-section">
            <div class="col-sm-12 brand-review-global">

                <h3> Brands Review  </h3> // here I want to show post of B


                <?php query_posts(\'cat=12\'); while ( have_posts() ) : the_post(); $i++;?>
                <div class="brand-review">
                    <a href="<?php the_permalink();?>">
                        <?php the_post_thumbnail(); ?>
                    </a>
                    <h4> <a href="<?php the_permalink();?>"> <?php echo substr(get_the_title(), 0,29); ?>...</a></h4>
                    <p>
                        <?php //echo substr(get_the_content(), 0,80); ?>
                    </p>
                    <!--<a class="readmore-review" href="<?php //the_permalink();?>">Read Review...</a>-->
                </div>
                <?php endwhile; wp_reset_query(); ?>


            </div>
        </div>

    </div>

    <?php get_footer(); ?>

add_action( \'pre_get_posts\', \'se342950_no_child_term_posts\' ); function se342950_no_child_term_posts( $query ) { if ( is_admin() || ! $query->is_main_query() || ! $query->is_category() ) return; $tax_obj = $query->get_queried_object(); $q_tax = [ \'taxonomy\' => $tax_obj->taxonomy, \'terms\' => $tax_obj->term_id, \'include_children\' => FALSE, ]; $query->query_vars[\'tax_query\'][] = $q_tax; }

// in category.php "get_queried_object()" returns WP_Term object $tax_obj = get_queried_object(); $posts_from_parent = []; if ( $tax_obj->parent != 0 ) { $args = [ \'post_type\' => \'post\', \'tax_query\' => [ [ \'taxonomy\' => $tax_obj->taxonomy, \'terms\' => $tax_obj->parent, \'include_children\' => FALSE, ] ] ]; $posts_from_parent = get_posts( $args ); }

?> <div class="col-sm-12 brand-review-global"> <h3> Brands Review </h3>  <?php global $post; // // get child category $tax_obj = get_queried_object(); $children = get_terms([ \'taxonomy\' => $tax_obj->taxonomy, \'parent\' => $tax_obj->term_id, \'fields\' => \'ids\', ]); if ( is_array($children) && count($children) ) { $child_cat_id = array_shift( $children ); // // get posts from child category $args = [ \'post_type\' => \'post\', \'tax_query\' => [ [ \'taxonomy\' => $tax_obj->taxonomy, \'terms\' => $child_cat_id, \'include_children\' => FALSE, ] ] ]; $posts_from_child = get_posts( $args ); // // display foreach( $posts_from_child as $post) { setup_postdata( $post ); ?> <div class="brand-review"> <a href="<?php the_permalink();?>"> <?php the_post_thumbnail(); ?> </a>  </div> <?php } wp_reset_postdata(); } else { echo \'No data to display\'; } ?> </div> <?php

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