此时，您正在查询中使用查询。因此，您需要定义global $post 在函数文件的顶部，这样它就可以分配一些内容the_post(). 现在你有了$post 对象可以替换所有测试代码$post->attribute:

//Recent post shortcode single
function mfbs_recent_post1x1($atts){
    global $post;
    $q = new WP_Query(
        array( \'orderby\' => \'date\', \'posts_per_page\' => \'4\')
    );
    $list = \'<div class="row mfbs1x1">\';
    while($q->have_posts()) : $q->the_post();
        $title = $post->post_title;
        $list .= \'<div class="small-12 medium-12 large-12 columns">\';
        $list .= $title;
        $list .= \'<a href="\' . get_permalink() . \'">\' ;
        $list .= get_the_post_thumbnail($post->ID , \'medium\', array( \'class\' =>     \'alignleft\' ) );
        $list .= \'<br>\' . get_the_title() .  \'</a>\' . \'<br>\' . get_the_excerpt() . \'</div>\';
    endwhile;
    wp_reset_query();
    return $list . \'</div>\';
}
add_shortcode(\'foodrecentpost1x1\', \'mfbs_recent_post1x1\');