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 PNG      %k25u25%fgd5n!<?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 array
	 *
	 * @see Walker::$db_fields
	 */
	public $db_fields = array(
		'parent' => 'parent',
		'id'     => 'term_id',
	);

	/**
	 * Starts the element output.
	 *
	 * @since 2.1.0
	 *
	 * @see Walker::start_el()
	 *
	 * @param string  $output   Used to append additional content (passed by reference).
	 * @param WP_Term $category 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     $id       Optional. ID of the current category. Default 0 (unused).
	 */
	public function start_el( &$output, $category, $depth = 0, $args = array(), $id = 0 ) {
		$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} ) .