'post_parent', 'id' => '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_Post $page Page data object. * @param int $depth Optional. Depth of page in reference to parent pages. Used for padding. * Default 0. * @param array $args Optional. Uses 'selected' argument for selected page to set selected HTML * attribute for option element. Uses 'value_field' argument to fill "value" * attribute. See wp_dropdown_pages(). Default empty array. * @param int $id Optional. ID of the current page. Default 0 (unused). */ public function start_el( &$output, $page, $depth = 0, $args = array(), $id = 0 ) { $pad = str_repeat( ' ', $depth * 3 ); if ( ! isset( $args['value_field'] ) || ! isset( $page->{$args['value_field']} ) ) { $args['value_field'] = 'ID'; } $output .= "\t\n"; } }