Question

For example : 
- A = 21
  - B = 22
     - C = 23

如何使用23个子ID获取21和22个ID？

Answer 1

要从产品类别字词ID中获取父字词ID，请尝试以下（带注释的代码）：

// Get the parent term slugs list
$parent_terms_list = get_term_parents_list( 23, 'product_cat', array('format' => 'slug', 'separator' => ',', 'link' => false, 'inclusive' => false) );

$parent_terms_ids = []; // Initialising variable

// Loop through parent terms slugs array to convert them in term IDs array
foreach( explode(',', $parent_terms_list) as $term_slug ){
    if( ! empty($term_slug) ){
        // Get the term ID from the term slug and add it to the array of parent terms Ids
        $parent_terms_ids[] = get_term_by( 'slug', $term_slug, 'product_cat' )->term_id;
    }
}

// Test output of the raw array (just for testing)
print_r($parent_terms_ids);

经过测试可以正常工作。

已记录的Wordpress功能get_term_parents_list()
已记录的Wordpress功能get_term_by()

Answer 2

function parentIDs($sub_category_id)
{
    static $parent_ids = [];        
    if ( $sub_category_id != 0 ) {
        $category_parent = get_term( $sub_category_id, 'product_cat' );             
        $parent_ids[] = $category_parent->term_id;
        parentIDs($category_parent->parent);
    } 
    return $parent_ids;
}
$sub_category_id = 23;
$parent_ids_array = parentIDs($sub_category_id);
echo "<pre>";
print_r($parent_ids_array);
echo "</pre>";

Answer 3

获取父母ID的最快方法是使用Wordpress提供并记录的内置函数。参见get_ancestors

如果您已选中get_term_parents_list，则会看到它使用了get_ancestors，请参阅此链接 https://core.trac.wordpress.org/browser/tags/5.4/src/wp-includes/category-template.php#L1362

所以简短的答案就在代码下面。

$parent_ids = get_ancestors( $child_id, 'product_cat' , 'taxonomy');

从Woocommerce中的子产品类别ID获取父产品类别ID

3 个答案: