WordPress:将级别指示器添加到类别列表

WordPress: Add level indicator to category list

我将类别列表显示为 select 字段的选项。 问题是,每个类别看起来都一样。即使它们是子类别。

例如,我的类别树如下所示:

但在 select 字段中显示如下:

这是我在表单中填充 select 字段的代码:

function populate_dropdown_with_product_categories( $form ) {
    //product_cat is the taxonomy for WooCommerce's products
    //get the terms for the product_cat taxonomy
    $product_categories = get_terms( 'product_cat', array('hide_empty' => false,) );

    //Creating drop down item array.
    $items = array();

    //Adding product category terms to the items array
    foreach ( $product_categories as $product_category ) {
        $items[] = array( 'value' => $product_category->name, 'text' => $product_category->name );
    }

    //Adding items to field id 6. Replace 6 with your actual field id. You can get the field id by looking at the input name in the markup.
    foreach ( $form['fields'] as &$field ) {
        if ( $field->id == 64 ) {
            $field->choices = $items;
        }
    }

    return $form;
}

我想我需要在这一行中添加类别的级别:

$items[] = array( 'value' => $product_category->name, 'text' => $product_category->name );

但是我该怎么做呢? 对我来说,如果每个级别在名称前都有一个 -(第三级两个 -...)就足够了。

像这样:

 - Main category
 -- Sub category 
 --- Third level category

我找到了解决办法。我已经像这样更改了 foreach 代码:

foreach ( $product_categories as $product_category ) {
    $product_category_level = count( get_ancestors($product_category->term_id, 'product_cat'));

    if ($product_category_level == 1 ) :
        $product_category_level_indicator = '- ';
    elseif ($product_category_level == 2 ) :
        $product_category_level_indicator = '-- ';
    else:
        $product_category_level_indicator = '';
    endif;

    $items[] = array( 'value' => $product_category->name, 'text' => $product_category_level_indicator.$product_category->name );
}

对我有用。 感谢反馈。