将子计数添加到父计数。

原型

_pad_term_counts( array $terms, string $taxonomy )

描述

通过包含子术语中的项目来重新计算术语计数。假设所有相关的孩子都已经在$ terms参数中。

参数

$terms (array) (Required) 术语对象列表(通过引用传递)。

$taxonomy (string) (Required) 术语背景。

源文件

路径:wp-includes/taxonomy.php

<?php
...
function _pad_term_counts( &$terms, $taxonomy ) {
	global $wpdb;
	// This function only works for hierarchical taxonomies like post categories.
	if ( !is_taxonomy_hierarchical( $taxonomy ) )
		return;
	$term_hier = _get_term_hierarchy($taxonomy);
	if ( empty($term_hier) )
		return;
	$term_items = array();
	$terms_by_id = array();
	$term_ids = array();
	foreach ( (array) $terms as $key => $term ) {
		$terms_by_id[$term->term_id] = & $terms[$key];
		$term_ids[$term->term_taxonomy_id] = $term->term_id;
	}
	// Get the object and term ids and stick them in a lookup table.
	$tax_obj = get_taxonomy($taxonomy);
	$object_types = esc_sql($tax_obj->object_type);
	$results = $wpdb->get_results("SELECT object_id, term_taxonomy_id FROM $wpdb->term_relationships INNER JOIN $wpdb->posts ON object_id = ID WHERE term_taxonomy_id IN (" . implode(',', array_keys($term_ids)) . ") AND post_type IN ('" . implode("', '", $object_types) . "') AND post_status = 'publish'");
	foreach ( $results as $row ) {
		$id = $term_ids[$row->term_taxonomy_id];
		$term_items[$id][$row->object_id] = isset($term_items[$id][$row->object_id]) ? ++$term_items[$id][$row->object_id] : 1;
	}
	// Touch every ancestor's lookup row for each post in each term.
	foreach ( $term_ids as $term_id ) {
		$child = $term_id;
		$ancestors = array();
		while ( !empty( $terms_by_id[$child] ) && $parent = $terms_by_id[$child]->parent ) {
			$ancestors[] = $child;
			if ( !empty( $term_items[$term_id] ) )
				foreach ( $term_items[$term_id] as $item_id => $touches ) {
					$term_items[$parent][$item_id] = isset($term_items[$parent][$item_id]) ? ++$term_items[$parent][$item_id]: 1;
				}
			$child = $parent;
			if ( in_array( $parent, $ancestors ) ) {
				break;
			}
		}
	}
	// Transfer the touched cells.
	foreach ( (array) $term_items as $id => $items )
		if ( isset($terms_by_id[$id]) )
			$terms_by_id[$id]->count = count($items);
}
...
?>

其他

英文文档:https://developer.wordpress.org/reference/functions/_pad_term_counts/