WordPress类别顺序按自定义字段(完成).如何仅输出一次自定义字段

Question

我使用WordPress类别创建了城市的公司目录。类别是城市。自定义字段是包括城市的区域。对于使用的自定义字段 - 高级自定义字段用于构建自定义分类命令-WP术语订单

$terms = get_terms( 'catalog_categories', array(
    'depth'      => 1,
    'number'     => 100,
    'parent'     => 0,
    'orderby'    => 'taxon_name', // order array name
    'order'      => 'DESC',
    'hide_empty' => false,
    'meta_query' => array(
        'taxon_name' => array(
            'key' => 'taxon' // acf custom field name
        ) )
) );
foreach ($terms as $key => $object) {
    $region = get_field('taxon', $object);
    echo $region . ' ' . $object->name . '<br>';
}

i recive：
wielkopolskie poznań
Wielkopolskie bojanowo
Mazoweckie Warszawa
dolnoslaskie wrocław
Dolnoslaskie Jawor

但我需要：
Wielkopolskie
- 波兹南
- bojanowo
Mazoweckie
- 华沙
dolnoslaskie
-Wrocław
- Jawor

请帮助此问题的决定
更新
*帮助请在WordPress类别中添加一个链接（slug）到代码在这里，我们收集一个地区的所有城市：
$ collection [$ region] [] = $ object-> name;
我们需要向每个城市添加一个slug
$ object-> slug;
我们需要将其用作选项的值。

'<option value="' . **SLUG** . '" data-select2-id="'. $data_select_id . '-' .$i .'">' . $city . '</option>';

Update ：
*工作代码
我们添加到-uncollection [$ region] [] = $ object-> name; - $ object-> slug并将它们组合成数组
$ collection [$ region] [] = array（'name'=> $ object-> name，'slug'=> $ object-> slug）;
对于输出，我们使用 - $ city ['name']和$ city ['slug']

<?php
$terms = get_terms( 'catalog_categories', array(
    'depth'      => 1,
    'number'     => 100,
    'parent'     => 0,
    'orderby'    => 'taxon_name', // order array name
    'order'      => 'DESC',
    'hide_empty' => false,
    'meta_query' => array(
        'taxon_name' => array(
            'key' => 'taxon' // acf custom field name
        ) )
) );
$collection = [];
foreach ($terms as $key => $object) {
    $region = get_field('taxon', $object);
    if (!isset($collection[$region])) {
        $collection[$region] = [];
    }
    $collection[$region][] = array('name' => $object->name, 'slug' => $object->slug);
}
$data_select_id = 1;
echo '<div>';
    foreach ($collection as $region => $cities) {
        $i = 0;
        echo '<div label="' . $region . '" data-select2-id="' . $data_select_id . '">'. $region;
            foreach ($cities as $city) {
                $i++;
                echo '<option value="' . $city['slug'] . '" data-select2-id="'. $data_select_id . '-' .$i .'">' . $city['name'] . '</option>';
            }
        echo '</div>'; 
        $data_select_id ++;
    }
echo '</div>'; 
;?>

Answer 1

您可以使用其他数组将城市整理到这样的区域：

$collection = [];
foreach ($terms as $key => $object) {
    $region = get_field('taxon', $object);
    if (!isset($collection[$region])) {
        $collection[$region] = [];
    }
    $collection[$region][] = $object->name;
}
foreach ($collection as $region => $cities) {
    echo $region . '<br/>';
    foreach ($cities as $city) {
        echo '--' . $city . '<br/>';
    }
}