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