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Edit File: class-walker-category-dropdown.php

<?php /** * Taxonomy API: Walker_CategoryDropdown class * * @package WordPress * @subpackage Template * @since 4.4.0 */ /** * Core class used to create an HTML dropdown list of Categories. * * @since 2.1.0 * * @see Walker */ class Walker_CategoryDropdown extends Walker { /** * What the class handles. * * @since 2.1.0 * @var string * * @see Walker::$tree_type */ public $tree_type = 'category'; /** * Database fields to use. * * @since 2.1.0 * @todo Decouple this * @var string[] * * @see Walker::$db_fields */ public $db_fields = array( 'parent' => 'parent', 'id' => 'term_id', ); /** * Starts the element output. * * @since 2.1.0 * @since 5.9.0 Renamed `$category` to `$data_object` and `$id` to `$current_object_id` * to match parent class for PHP 8 named parameter support. * * @see Walker::start_el() * * @param string $output Used to append additional content (passed by reference). * @param WP_Term $data_object Category data object. * @param int $depth Depth of category. Used for padding. * @param array $args Uses 'selected', 'show_count', and 'value_field' keys, if they exist. * See wp_dropdown_categories(). * @param int $current_object_id Optional. ID of the current category. Default 0. */ public function start_el( &$output, $data_object, $depth = 0, $args = array(), $current_object_id = 0 ) { // Restores the more descriptive, specific name for use within this method. $category = $data_object; $pad = str_repeat( '&nbsp;', $depth * 3 ); /** This filter is documented in wp-includes/category-template.php */ $cat_name = apply_filters( 'list_cats', $category->name, $category ); if ( isset( $args['value_field'] ) && isset( $category->{$args['value_field']} ) ) { $value_field = $args['value_field']; } else { $value_field = 'term_id'; } $output .= "\t<option class=\"level-$depth\" value=\"" . esc_attr( $category->{$value_field} ) . '"'; // Type-juggling causes false matches, so we force everything to a string. if ( (string) $category->{$value_field} === (string) $args['selected'] ) { $output .= ' selected="selected"'; } $output .= '>'; $output .= $pad . $cat_name; if ( $args['show_count'] ) { $output .= '&nbsp;&nbsp;(' . number_format_i18n( $category->count ) . ')'; } $output .= "</option>\n"; } }