Walker_Category_Checklist::start_el( string $output, WP_Term $data_object, int $depth = 0, array $args = array(), int $current_object_id = 0 )

73	public function start_el( &$output, $data_object, $depth = 0, $args = array(), $current_object_id = 0 ) {74		// Restores the more descriptive, specific name for use within this method.75		$category = $data_object;76 77		if ( empty( $args['taxonomy'] ) ) {78			$taxonomy = 'category';79		} else {80			$taxonomy = $args['taxonomy'];81		}82 83		if ( 'category' === $taxonomy ) {84			$name = 'post_category';85		} else {86			$name = 'tax_input[' . $taxonomy . ']';87		}88 89		$args['popular_cats'] = ! empty( $args['popular_cats'] ) ? array_map( 'intval', $args['popular_cats'] ) : array();90 91		$class = in_array( $category->term_id, $args['popular_cats'], true ) ? ' class="popular-category"' : '';92 93		$args['selected_cats'] = ! empty( $args['selected_cats'] ) ? array_map( 'intval', $args['selected_cats'] ) : array();94 95		if ( ! empty( $args['list_only'] ) ) {96			$aria_checked = 'false';97			$inner_class  = 'category';98 99			if ( in_array( $category->term_id, $args['selected_cats'], true ) ) {100				$inner_class .= ' selected';101				$aria_checked = 'true';102			}103 104			$output .= "\n" . '<li' . $class . '>' .105				'<div class="' . $inner_class . '" data-term-id=' . $category->term_id .106				' tabindex="0" role="checkbox" aria-checked="' . $aria_checked . '">' .107				/** This filter is documented in wp-includes/category-template.php */108				esc_html( apply_filters( 'the_category', $category->name, '', '' ) ) . '</div>';109		} else {110			$is_selected         = in_array( $category->term_id, $args['selected_cats'], true );111			$is_disabled         = ! empty( $args['disabled'] );112			$li_element_id       = wp_unique_prefixed_id( "in-{$taxonomy}-{$category->term_id}-" );113			$checkbox_element_id = wp_unique_prefixed_id( "in-{$taxonomy}-{$category->term_id}-" );114 115			$output .= "\n<li id='" . esc_attr( $li_element_id ) . "'$class>" .116				'<label class="selectit"><input value="' . $category->term_id . '" type="checkbox" name="' . $name . '[]" id="' . esc_attr( $checkbox_element_id ) . '"' .117				checked( $is_selected, true, false ) .118				disabled( $is_disabled, true, false ) . ' /> ' .119				/** This filter is documented in wp-includes/category-template.php */120				esc_html( apply_filters( 'the_category', $category->name, '', '' ) ) . '</label>';121		}122	}