Wordpress：显示类别及其子项

Question

我正在为具有这种结构的公司制作零售商名单。 您首先列出一个拥有城市的国家/地区，该城市拥有零售商。 这是通过我创建的自定义帖子类型连接起来的，它简称为“零售商”，然后我对这种自定义帖子类型进行了分类，其中国家作为父项，城市作为子项。

Country 1
-- City 1
--- Retailer 1
--- Retailer 2
-- City 2
--- Retailer 3
--- Retailer 4
Country 2
-- City 3
--- Retailer 5
-- City 4
---- Retailer 6

问题是我被卡住了，只能显示城市及其零售商，我希望能够包括国家/地区，以便它们也显示在循环中。如何添加代码以便从分类中取出父项？

这是我的循环代码

$args = array( 'post_type' => 'drsj_retailer', 'posts_per_page' => -1);
$loop = new WP_Query( $args );

$allCities = array();

while ( $loop->have_posts() ) : $loop->the_post();

    $post_id = get_the_ID();
    $args = array('orderby' => 'name', 'order' => 'ASC', 'fields' => 'all');
    $terms = wp_get_post_terms( $post_id, 'retailer_city', $args );

    $store = array();
    $store['title'] = get_the_title();
    $store['adress'] = get_field('reseller_adress');
    $store['phone'] = get_field('reseller_phone');
    $store['website'] = get_field('reseller_website');

    $allCities[$terms[0]->name][] = $store;

endwhile;

foreach($allCities as $cityName => $stores) {
    echo "<div class='resellerEntry'>";
    echo "<h3 class='retailerCityTitle'>" . $cityName . "</h3>";

    foreach($stores as $store) {
        echo "<p>" . $store['title'] . "&nbsp;";
        echo "" . $store['adress'] . "&nbsp;";
        echo "" . $store['phone'] . "&nbsp;";
        echo "<a href='http://" . $store['website'] . "' target='_blank'>" . $store['website'] . "</a></p>";
    }

    echo "</div>";                
}

当前列表的图像：

分类结构图：

Answer 1

试试这个

<?php

//***----------------Parent cat args---------------------***/
$Parentcatargs = array(
    'orderby' => 'name',
    'order' => 'ASC',
    'use_desc_for_title' => 1,
    'hide_empty' => 0,
    'parent' => 0
);

$category = get_categories($Parentcatargs);
//print_r($category); //Return Array

foreach ($category as $Parentcat) {

    echo $Parentcat->name . "<br>";  //Get Parent Category Name

    //***----------------child cat args---------------------***/    
    $childargs = array(
        'child_of' => $Parentcat->cat_ID,
        'hide_empty' => 0,
        'parent' => $Parentcat->cat_ID
    );


    $childcategories = get_categories($childargs);
    //print_r($childcategories); //Return Array

    foreach ($childcategories as $childcat) {
        echo $childcat->name . "<br>";  //Get child Category Name
    }
}
?>

有用链接：https://codex.wordpress.org/Function_Reference/get_categories