是否确实要以这种方式执行此操作？通常，这样的节可能会以某种方式写入页面模板，而不是通过内容编辑器调用。也就是说，这应该满足您的需要：

add_shortcode( \'show_xyz_news\', \'xyz_news_query\' );

function xyz_news_query() {
    $args = array(
        \'posts_per_page\' => 3,
        \'category_name\' => \'news\',
    );
    $news_query = new WP_Query( $args );
    if ( $news_query->have_posts() ) :
        $html_out = \'<ul>\';
        while ( $news_query->have_posts() ) :
            $news_query->the_post();
            // Do stuff with each post here
            $html_out .= \'<li><a href="\' . get_permalink() . \'">\' . get_the_title() . \'</a></li>\';
        endwhile;
        $html_out .= \'</ul>\';
    else : // No results
        echo "Nothing to show";
    endif;
    wp_reset_query();
    return $html_out;
}