按自定义域排序的Wordpress类别（完成）。如何只输出一次自定义域

Question

我使用Wordpress类别创建了一个按城市划分的公司目录。类别是城市。自定义域是包含城市的区域。用于自定义域-用于构建自定义分类顺序的高级自定义域-WP术语顺序

$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 recurive:
Wielkopolskie Poznan
Wielkopolskie Bojanowo
Mazoweckie Warszawa
Dolnoslaskie Wrocóaw
Dolnoslaskie Jawor

帮助请与此问题的决定
更新
*帮助请添加一个链接到Wordpress类别到代码这里我们收集一个地区的所有城市:
$collection[$region][]=$object->name；
我们需要为每个城市添加一个slug
$object->slug；
我们需要将slug用作选项的值。

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

更新:
*工作代码
我们添加到-$collection[$region][]=$object->name；-$object->slug并将它们组合成一个数组
$collection[$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

您可以使用一个额外的数组将城市划分为如下所示的区域：

$collection = [];
foreach ($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/>';
    }
}