我的问题与此类似，我自己使用了该技术，但不知道我哪里出错了，所以让我们看看代码。
目的：获取为选择字段设置的选项集中所有父分类的列表
<option value="parent-cat-1">Parent Category 1</option>
<option value="parent-cat-2">Parent Category 2</option>
<option value="parent-cat-3">Parent Category 3</option>
这是PHP代码：
$taxonomy_names = get_object_taxonomies( $atts['post_type']);
$args = array('post_type' => $atts['post_type']);
query_posts($args);
foreach ($taxonomy_names as $taxonomy_name) {
if ( have_posts() ) : while ( have_posts() ) : the_post();
$terms = get_the_terms( $post->ID, $taxonomy_name );
foreach( $terms as $term ) {
$parent_term = get_term( $term->parent, $taxonomy_name );
$term_list .= $parent_term->name . ', ' ;
}
var_dump($terms);
endwhile; endif; wp_reset_query();
echo $term_list;
}
var_dump($terms);显示string(2) ", " string(4) ", , " string(18) ", , Category 1, , "
var_dump($parent_term); shows object(WP_Error)#980 (2) { ["errors":"WP_Error":private]=> array(1) { ["invalid_term"]=> array(1) { [0]=> string(10) "Empty Term" } } ["error_data":"WP_Error":private]=> array(0) { } } object(WP_Error)#1924 (2) { ["errors":"WP_Error":private]=> array(1) { ["invalid_term"]=> array(1) { [0]=> string(10) "Empty Term" } } ["error_data":"WP_Error":private]=> array(0) { } } object(WP_Error)#1924 (2) { ["errors":"WP_Error":private]=> array(1) { ["invalid_term"]=> array(1) { [0]=> string(10) "Empty Term" } } ["error_data":"WP_Error":private]=> array(0) { } }
我会考虑将所有这些东西包装在一个函数中，更好。
谢谢
<select class="input-form" size="1" name="what" required>
<option disabled selected>Выбрать</option>
<?php
$taxonomies = get_taxonomies(array(
'object_type' => ['advert']
), 'objects');
foreach( $taxonomies as $cur_term ){
echo '<option value="' . $cur_term -> name . '">' . $cur_term -> label . '</option>';
}
?>
</select>