是的，您可以使用两种功能：

对于默认值category 分类法，您可以使用cat_is_ancestor_of():

// Retrieve category object by slug:
$parent_cat = get_category_by_slug( \'clothes\' );  // term object
$child_cat  = get_category_by_slug( \'t-shirts\' ); // term object

/* Or retrieve category ID by name:
$parent_cat = get_cat_ID( \'Clothes\' );  // term ID
$child_cat  = get_cat_ID( \'T-Shirts\' ); // term ID
*/

if ( cat_is_ancestor_of( $parent_cat, $child_cat ) ) {
    echo \'t-shirts is child of clothes\';
}

对于自定义分类法，可以使用term_is_ancestor_of():

// Set the custom taxonomy\'s slug:
$taxonomy = \'my_taxonomy\';

// Retrieve term object by slug:
$parent_cat = get_term_by( \'slug\', \'clothes\', $taxonomy );
$child_cat  = get_term_by( \'slug\', \'t-shirts\', $taxonomy );
/* Or name, if you want:
$parent_cat = get_term_by( \'name\', \'Clothes\', $taxonomy );
$child_cat  = get_term_by( \'name\', \'T-Shirts\', $taxonomy );
*/

if ( term_is_ancestor_of( $parent_cat, $child_cat, $taxonomy ) ) {
    echo \'t-shirts is child of clothes\';
}

请注意cat_is_ancestor_of() 实际上是一个包装器（即它使用）term_is_ancestor_of() 它可以接受术语ID或对象，例如cat_is_ancestor_of( 1, 2 ) 和term_is_ancestor_of( 3, 4, \'my_taxonomy\' ) 其中数字如下1 和3 是术语ID。