「ashe」というテーマでエラーメッセージ表示

Question

実現したいこと

ナビゲーションに当てられているのですが、なぜか
エラー表示が出てしまいます。どなたかお力かしていただけますか？

エラーメッセージ

Warning: sprintf(): Too few arguments in /home/aquaokapi3/www/wproot/wp-includes/nav-menu-template.php on line 261

ソースコード

<?php
/**
 * Nav Menu API:
 *
 * @package WordPress
 * @subpackage Nav_Menus
 * @since 3.0.0
 */

/** Walker_Nav_Menu class */
require_once ABSPATH . WPINC . '/class-walker-nav-menu.php';

/**
 * Displays a navigation menu.
 *
 * @since 3.0.0
 * @since 4.7.0 Added the `item_spacing` argument.
 *
 * @staticvar array $menu_id_slugs
 *
 * @param array $args {
 *     Optional. Array of .
 *
 *     @type int|string|WP_Term $menu            Desired menu. Accepts a menu ID, slug, name, or object. Default empty.
 *     @type string             $menu_class      CSS class to use for the ul element which forms the menu. Default 'menu'.
 *     @type string             $menu_id         The ID that is applied to the ul element which forms the menu.
 *                                               Default is the menu slug, incremented.
 *     @type string             $container       Whether to wrap the ul, and what to wrap it with. Default 'div'.
 *     @type string             $container_class Class that is applied to the container. Default 'menu-{menu slug}-container'.
 *     @type string             $container_id    The ID that is applied to the container. Default empty.
 *     @type callable|bool      $fallback_cb     If the menu doesn't exists, a callback function will fire.
 *                                               Default is 'wp_page_menu'. Set to false for no fallback.
 *     @type string             $before          Text before the link markup. Default empty.
 *     @type string             $after           Text after the link markup. Default empty.
 *     @type string             $link_before     Text before the link text. Default empty.
 *     @type string             $link_after      Text after the link text. Default empty.
 *     @type bool               $echo            Whether to echo the menu or return it. Default true.
 *     @type int                $depth           How many levels of the hierarchy are to be included. 0 means all. Default 0.
 *     @type object             $walker          Instance of a custom walker class. Default empty.
 *     @type string             $theme_location  Theme location to be used. Must be registered with register_nav_menu()
 *                                               in order to be selectable by the user.
 *     @type string             $items_wrap      How the list items should be wrapped. Default is a ul with an id and class.
 *                                               Uses printf() format with numbered placeholders.
 *     @type string             $item_spacing    Whether to preserve whitespace within the menu's HTML. Accepts 'preserve' or 'discard'. Default 'preserve'.
 * }
 * @return string|false|void Menu output if $echo is false, false if there are no items or no menu was found.
 */
function wp_nav_menu( $args = array() ) {
	static $menu_id_slugs = array();

	$defaults = array(
		'menu'            => '',
		'container'       => 'div',
		'container_class' => '',
		'container_id'    => '',
		'menu_class'      => 'menu',
		'menu_id'         => '',
		'echo'            => true,
		'fallback_cb'     => 'wp_page_menu',
		'before'          => '',
		'after'           => '',
		'link_before'     => '',
		'link_after'      => '',
		'items_wrap'      => '<ul id="%1$s" class="%2$s">%3$s</ul>',
		'item_spacing'    => 'preserve',
		'depth'           => 0,
		'walker'          => '',
		'theme_location'  => '',
	);

	$args = wp_parse_args( $args, $defaults );

	if ( ! in_array( $args['item_spacing'], array( 'preserve', 'discard' ), true ) ) {
		// invalid value, fall back to default.
		$args['item_spacing'] = $defaults['item_spacing'];
	}

	/**
	 * Filters the arguments used to display a navigation menu.
	 *
	 * @since 3.0.0
	 *
	 * @see wp_nav_menu()
	 *
	 * @param array $args Array of wp_nav_menu() arguments.
	 */
	$args = apply_filters( 'wp_nav_menu_args', $args );
	$args = (object) $args;

	/**
	 * Filters whether to short-circuit the wp_nav_menu() output.
	 *
	 * Returning a non-null value to the filter will short-circuit
	 * wp_nav_menu(), echoing that value if $args->echo is true,
	 * returning that value otherwise.
	 *
	 * @since 3.9.0
	 *
	 * @see wp_nav_menu()
	 *
	 * @param string|null $output Nav menu output to short-circuit with. Default null.
	 * @param stdClass    $args   An object containing wp_nav_menu() arguments.
	 */
	$nav_menu = apply_filters( 'pre_wp_nav_menu', null, $args );

	if ( null !== $nav_menu ) {
		if ( $args->echo ) {
			echo $nav_menu;
			return;
		}

		return $nav_menu;
	}

	// Get the nav menu based on the requested menu
	$menu = wp_get_nav_menu_object( $args->menu );

	// Get the nav menu based on the theme_location
	if ( ! $menu && $args->theme_location && ( $locations = get_nav_menu_locations() ) && isset( $locations[ $args->theme_location ] ) ) {
		$menu = wp_get_nav_menu_object( $locations[ $args->theme_location ] );
	}

	// get the first menu that has items if we still can't find a menu
	if ( ! $menu && ! $args->theme_location ) {
		$menus = wp_get_nav_menus();
		foreach ( $menus as $menu_maybe ) {
			if ( $menu_items = wp_get_nav_menu_items( $menu_maybe->term_id, array( 'update_post_term_cache' => false ) ) ) {
				$menu = $menu_maybe;
				break;
			}
		}
	}

	if ( empty( $args->menu ) ) {
		$args->menu = $menu;
	}

	// If the menu exists, get its items.
	if ( $menu && ! is_wp_error( $menu ) && ! isset( $menu_items ) ) {
		$menu_items = wp_get_nav_menu_items( $menu->term_id, array( 'update_post_term_cache' => false ) );
	}

	/*
	 * If no menu was found:
	 *  - Fall back (if one was specified), or bail.
	 *
	 * If no menu items were found:
	 *  - Fall back, but only if no theme location was specified.
	 *  - Otherwise, bail.
	 */
	if ( ( ! $menu || is_wp_error( $menu ) || ( isset( $menu_items ) && empty( $menu_items ) && ! $args->theme_location ) )
		&& isset( $args->fallback_cb ) && $args->fallback_cb && is_callable( $args->fallback_cb ) ) {
			return call_user_func( $args->fallback_cb, (array) $args );
	}

	if ( ! $menu || is_wp_error( $menu ) ) {
		return false;
	}

	$nav_menu = $items = '';

	$show_container = false;
	if ( $args->container ) {
		/**
		 * Filters the list of HTML tags that are valid for use as menu containers.
		 *
		 * @since 3.0.0
		 *
		 * @param array $tags The acceptable HTML tags for use as menu containers.
		 *                    Default is array containing 'div' and 'nav'.
		 */
		$allowed_tags = apply_filters( 'wp_nav_menu_container_allowedtags', array( 'div', 'nav' ) );
		if ( is_string( $args->container ) && in_array( $args->container, $allowed_tags ) ) {
			$show_container = true;
			$class          = $args->container_class ? ' class="' . esc_attr( $args->container_class ) . '"' : ' class="menu-' . $menu->slug . '-container"';
			$id             = $args->container_id ? ' id="' . esc_attr( $args->container_id ) . '"' : '';
			$nav_menu      .= '<' . $args->container . $id . $class . '>';
		}
	}

	// Set up the $menu_item variables
	_wp_menu_item_classes_by_context( $menu_items );

	$sorted_menu_items = $menu_items_with_children = array();
	foreach ( (array) $menu_items as $menu_item ) {
		$sorted_menu_items[ $menu_item->menu_order ] = $menu_item;
		if ( $menu_item->menu_item_parent ) {
			$menu_items_with_children[ $menu_item->menu_item_parent ] = true;
		}
	}

	// Add the menu-item-has-children class where applicable
	if ( $menu_items_with_children ) {
		foreach ( $sorted_menu_items as &$menu_item ) {
			if ( isset( $menu_items_with_children[ $menu_item->ID ] ) ) {
				$menu_item->classes[] = 'menu-item-has-children';
			}
		}
	}

	unset( $menu_items, $menu_item );

	/**
	 * Filters the sorted list of menu item objects before generating the menu's HTML.
	 *
	 * @since 3.1.0
	 *
	 * @param array    $sorted_menu_items The menu items, sorted by each menu item's menu order.
	 * @param stdClass $args              An object containing wp_nav_menu() arguments.
	 */
	$sorted_menu_items = apply_filters( 'wp_nav_menu_objects', $sorted_menu_items, $args );

	$items .= walk_nav_menu_tree( $sorted_menu_items, $args->depth, $args );
	unset( $sorted_menu_items );

	// Attributes
	if ( ! empty( $args->menu_id ) ) {
		$wrap_id = $args->menu_id;
	} else {
		$wrap_id = 'menu-' . $menu->slug;
		while ( in_array( $wrap_id, $menu_id_slugs ) ) {
			if ( preg_match( '#-(\d+)$#', $wrap_id, $matches ) ) {
				$wrap_id = preg_replace( '#-(\d+)$#', '-' . ++$matches[1], $wrap_id );
			} else {
				$wrap_id = $wrap_id . '-1';
			}
		}
	}
	$menu_id_slugs[] = $wrap_id;

	$wrap_class = $args->menu_class ? $args->menu_class : '';

	/**
	 * Filters the HTML list content for navigation menus.
	 *
	 * @since 3.0.0
	 *
	 * @see wp_nav_menu()
	 *
	 * @param string   $items The HTML list content for the menu items.
	 * @param stdClass $args  An object containing wp_nav_menu() arguments.
	 */
	$items = apply_filters( 'wp_nav_menu_items', $items, $args );
	/**
	 * Filters the HTML list content for a specific navigation menu.
	 *
	 * @since 3.0.0
	 *
	 * @see wp_nav_menu()
	 *
	 * @param string   $items The HTML list content for the menu items.
	 * @param stdClass $args  An object containing wp_nav_menu() arguments.
	 */
	$items = apply_filters( "wp_nav_menu_{$menu->slug}_items", $items, $args );

	// Don't print any markup if there are no items at this point.
	if ( empty( $items ) ) {
		return false;
	}
	$nav_menu .= sprintf( $args->items_wrap, esc_attr( $wrap_id ), esc_attr( $wrap_class ), $items );
	unset( $items );

Answer 1

sprintf()においてToo few arguments (引数が少なすぎる)というのは下記のようなケースになります。

<?php
echo sprintf("%s %s %s","a","b");

3つ受け口があるのに2つしかつけてないということですね。

ちなみにnullでも入ればOKです。

<?php
echo sprintf("%s %s %s","a","b",null);

多くてもエラーにはなりません。

<?php
echo sprintf("%s %s %s","a","b",null,null);

で、提示コードだと第一引数$args->items_wrapの内容は下記ですかね
<ul id="%1$s" class="%2$s">%3$s</ul>

番号が当てられているように3つの引数を求めています。

$nav_menu .= sprintf( $args->items_wrap
, esc_attr( $wrap_id ) //1
, esc_attr( $wrap_class ) //2
, $items ); //3

3つ入っているように見えます。

・・・となると

怪しいのは下記

$args = wp_parse_args( $args, $defaults );

WordPress私的マニュアル/wp parse args

クエリー文字列を解析し、各パラメータのデフォルト値とマージした連想配列を取得する

「マージ」なのですが、重複したキーがあった場合は$argsのほうが残るようです。

パラメータ$argsに'post=44&action=edit'、$defaultsがarray( 'post'=>0,'action'='new', 'post_type'=>'post' )の場合、この関数の戻り値は次のようになる。

array( 'post' => 44, 'action' => 'edit', 'post_type' => 'post' )

と、いうことはwp_nav_menu()の引数$argsにitems_wrapというキーが設定されており、defaultのitems_wrapに指定されている引数より多くの引数が設置されている、と考えられます。

まずは$args->items_wrapの内容をvar_dump()で確認し、どのような値になっているかで対策を決めましょう。

※ただ、提示されたコードがasheというテーマのファイルの一部で自身が何も組んでいないものでしたらテーマのアップデートで改善されるかもしれません。
アップデートで解決しなければテーマの開発元に問い合わせてみましょう。