Edit file File name : class-walker-category-checklist.php Content :<?php /** * Taxonomy API: Walker_Category_Checklist class * * @package WordPress * @subpackage Administration * @since 4.4.0 */ /** * Core walker class to output an unordered list of category checkbox input elements. * * @since 2.5.1 * * @see Walker * @see wp_category_checklist() * @see wp_terms_checklist() */ class Walker_Category_Checklist extends Walker { public $tree_type = 'category'; public $db_fields = array( 'parent' => 'parent', 'id' => 'term_id', ); // TODO: Decouple this. /** * Starts the list before the elements are added. * * @see Walker:start_lvl() * * @since 2.5.1 * * @param string $output Used to append additional content (passed by reference). * @param int $depth Depth of category. Used for tab indentation. * @param array $args An array of arguments. See {@see wp_terms_checklist()}. */ public function start_lvl( &$output, $depth = 0, $args = array() ) { $indent = str_repeat( "\t", $depth ); $output .= "$indent<ul class='children'>\n"; } /** * Ends the list of after the elements are added. * * @see Walker::end_lvl() * * @since 2.5.1 * * @param string $output Used to append additional content (passed by reference). * @param int $depth Depth of category. Used for tab indentation. * @param array $args An array of arguments. See {@see wp_terms_checklist()}. */ public function end_lvl( &$output, $depth = 0, $args = array() ) { $indent = str_repeat( "\t", $depth ); $output .= "$indent</ul>\n"; } /** * Start the element output. * * @see Walker::start_el() * * @since 2.5.1 * @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. * * @param string $output Used to append additional content (passed by reference). * @param WP_Term $data_object The current term object. * @param int $depth Depth of the term in reference to parents. Default 0. * @param array $args An array of arguments. See {@see wp_terms_checklist()}. * @param int $current_object_id Optional. ID of the current term. Default 0. */ public function start_el( &$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; if ( empty( $args['taxonomy'] ) ) { $taxonomy = 'category'; } else { $taxonomy = $args['taxonomy']; } if ( 'category' === $taxonomy ) { $name = 'post_category'; } else { $name = 'tax_input[' . $taxonomy . ']'; } $args['popular_cats'] = ! empty( $args['popular_cats'] ) ? array_map( 'intval', $args['popular_cats'] ) : array(); $class = in_array( $category->term_id, $args['popular_cats'], true ) ? ' class="popular-category"' : ''; $args['selected_cats'] = ! empty( $args['selected_cats'] ) ? array_map( 'intval', $args['selected_cats'] ) : array(); if ( ! empty( $args['list_only'] ) ) { $aria_checked = 'false'; $inner_class = 'category'; if ( in_array( $category->term_id, $args['selected_cats'], true ) ) { $inner_class .= ' selected'; $aria_checked = 'true'; } $output .= "\n" . '<li' . $class . '>' . '<div class="' . $inner_class . '" data-term-id=' . $category->term_id . ' tabindex="0" role="checkbox" aria-checked="' . $aria_checked . '">' . /** This filter is documented in wp-includes/category-template.php */ esc_html( apply_filters( 'the_category', $category->name, '', '' ) ) . '</div>'; } else { $is_selected = in_array( $category->term_id, $args['selected_cats'], true ); $is_disabled = ! empty( $args['disabled'] ); $output .= "\n<li id='{$taxonomy}-{$category->term_id}'$class>" . '<label class="selectit"><input value="' . $category->term_id . '" type="checkbox" name="' . $name . '[]" id="in-' . $taxonomy . '-' . $category->term_id . '"' . checked( $is_selected, true, false ) . disabled( $is_disabled, true, false ) . ' /> ' . /** This filter is documented in wp-includes/category-template.php */ esc_html( apply_filters( 'the_category', $category->name, '', '' ) ) . '</label>'; } } /** * Ends the element output, if needed. * * @see Walker::end_el() * * @since 2.5.1 * @since 5.9.0 Renamed `$category` to `$data_object` to match parent class for PHP 8 named parameter support. * * @param string $output Used to append additional content (passed by reference). * @param WP_Term $data_object The current term object. * @param int $depth Depth of the term in reference to parents. Default 0. * @param array $args An array of arguments. See {@see wp_terms_checklist()}. */ public function end_el( &$output, $data_object, $depth = 0, $args = array() ) { $output .= "</li>\n"; } } Save