php - 仅显示父自定义分类名称？

Question

我想只显示父类别名称而不是子类别名称没有在任何产品或帖子中使用，我只需要列出父自定义类别。

我尝试了 get_terms、wp_list_categories 功能，但它的显示 child 也

这是我的代码。

<?php 
  require_once('connection.php');
  $taxonomy     = 'product_cat';
  $orderby      = 'parent';
  $show_count   = 0;      // 1 for yes, 0 for no
  $pad_counts   = 0;      // 1 for yes, 0 for no
  $hierarchical = 0;      // 1 for yes, 0 for no
  $title        = '';
  $empty        = 0;

  $args = array(
    'taxonomy'     => $taxonomy,
    'orderby'      => $orderby,
    'show_count'   => $show_count,
    'pad_counts'   => $pad_counts,
    'childless'              => false,
    'child_of'               => 0,
    'title_li'     => $title,
    'hide_empty'   => $empty,
    'hierarchical'=>1
    //'hierarchical=0&depth=1'
  );

  $rrr=wp_list_categories( $args );
  print_r($rrr);
?>

它也显示 child ，但我只需要父类别名称。

i used Product_cat is a woocommerce category and when i used it with get_terms it's given null array.

i used like this way also but product_cat is not working with get_terms

<?php
$parent_cat_arg = array('hide_empty' => false, 'parent' => 0 );
$parent_cat = get_terms('product_cat',$parent_cat_arg);

foreach ($parent_cat as $catVal) {
  /*some code*/
}
?>

请参阅附件图片，我已经解释了我需要什么。

Answer 1

试试这个设置 parent 是 0

 $taxonomy     = 'product_cat';
  $orderby      = 'parent';
  $show_count   = 0;      // 1 for yes, 0 for no
  $pad_counts   = 0;      // 1 for yes, 0 for no
  $hierarchical = 0;      // 1 for yes, 0 for no
  $title        = '';
  $empty        = 0;

  $args = array(
    'taxonomy'     => $taxonomy,
    'orderby'      => $orderby,
    'show_count'   => $show_count,
    'pad_counts'   => $pad_counts,
    'childless'              => 0,
    'child_of'               => 0,
    'title_li'     => $title,
    'hide_empty'   => $empty,
    'parent'=>0,

  );

  $rrr=wp_list_categories( $args );
  print_r($rrr);