如何在wordpress中的类别上使用自定义字段？

function add_custom_category_fields($taxonomy) {
    ?>
    <div class="form-field term-meta-wrap">
        <label for="custom_field"><?php _e('Custom Field'); ?></label>
        <input type="text" name="custom_field" id="custom_field" value="<?php echo esc_attr(get_term_meta($term->term_id, 'custom_field', true)); ?>">
    </div>
    <?php
}
add_action('category_add_form_fields', 'add_custom_category_fields');
add_action('edit_category_form_fields', 'add_custom_category_fields');

function save_custom_category_fields($term_id) {
    if (isset($_POST['custom_field'])) {
        update_term_meta($term_id, 'custom_field', sanitize_text_field($_POST['custom_field']));
    }
}
add_action('edited_category', 'save_custom_category_fields');
add_action('create_category', 'save_custom_category_fields');

function display_custom_category_field($term_id) {
    $custom_field = get_term_meta($term_id, 'custom_field', true);
    if (!empty($custom_field)) {
        echo '<div class="custom-field">' . esc_html($custom_field) . '</div>';
    }
}
add_action('category_description', 'display_custom_category_field');