/**
 * Widget API: Default core widgets
 *
 * @package WordPress
 * @subpackage Widgets
 * @since 2.8.0
 */

/** WP_Widget_Pages class */
require_once( ABSPATH . WPINC . '/widgets/class-wp-widget-pages.php' );

/** WP_Widget_Links class */
require_once( ABSPATH . WPINC . '/widgets/class-wp-widget-links.php' );

/** WP_Widget_Search class */
require_once( ABSPATH . WPINC . '/widgets/class-wp-widget-search.php' );

/** WP_Widget_Archives class */
require_once( ABSPATH . WPINC . '/widgets/class-wp-widget-archives.php' );

/** WP_Widget_Media class */
require_once( ABSPATH . WPINC . '/widgets/class-wp-widget-media.php' );

/** WP_Widget_Media_Audio class */
require_once( ABSPATH . WPINC . '/widgets/class-wp-widget-media-audio.php' );

/** WP_Widget_Media_Image class */
require_once( ABSPATH . WPINC . '/widgets/class-wp-widget-media-image.php' );

/** WP_Widget_Media_Video class */
require_once( ABSPATH . WPINC . '/widgets/class-wp-widget-media-video.php' );

/** WP_Widget_Media_Gallery class */
require_once( ABSPATH . WPINC . '/widgets/class-wp-widget-media-gallery.php' );

/** WP_Widget_Meta class */
require_once( ABSPATH . WPINC . '/widgets/class-wp-widget-meta.php' );

/** WP_Widget_Calendar class */
require_once( ABSPATH . WPINC . '/widgets/class-wp-widget-calendar.php' );

/** WP_Widget_Text class */
require_once( ABSPATH . WPINC . '/widgets/class-wp-widget-text.php' );

/** WP_Widget_Categories class */
require_once( ABSPATH . WPINC . '/widgets/class-wp-widget-categories.php' );

/** WP_Widget_Recent_Posts class */
require_once( ABSPATH . WPINC . '/widgets/class-wp-widget-recent-posts.php' );

/** WP_Widget_Recent_Comments class */
require_once( ABSPATH . WPINC . '/widgets/class-wp-widget-recent-comments.php' );

/** WP_Widget_RSS class */
require_once( ABSPATH . WPINC . '/widgets/class-wp-widget-rss.php' );

/** WP_Widget_Tag_Cloud class */
require_once( ABSPATH . WPINC . '/widgets/class-wp-widget-tag-cloud.php' );

/** WP_Nav_Menu_Widget class */
require_once( ABSPATH . WPINC . '/widgets/class-wp-nav-menu-widget.php' );

/** WP_Widget_Custom_HTML class */
require_once( ABSPATH . WPINC . '/widgets/class-wp-widget-custom-html.php' );
<br />
<b>Fatal error</b>:  Uncaught Error: Class 'WP_Widget_Pages' not found in /home/sandyspa/yumbo.jp/public_html/wp-includes/class-wp-widget-factory.php:100
Stack trace:
#0 /home/sandyspa/yumbo.jp/public_html/wp-includes/widgets.php(115): WP_Widget_Factory-&gt;register('WP_Widget_Pages')
#1 /home/sandyspa/yumbo.jp/public_html/wp-includes/widgets.php(1606): register_widget('WP_Widget_Pages')
#2 /home/sandyspa/yumbo.jp/public_html/wp-includes/class-wp-hook.php(286): wp_widgets_init('')
#3 /home/sandyspa/yumbo.jp/public_html/wp-includes/class-wp-hook.php(310): WP_Hook-&gt;apply_filters(NULL, Array)
#4 /home/sandyspa/yumbo.jp/public_html/wp-includes/plugin.php(453): WP_Hook-&gt;do_action(Array)
#5 /home/sandyspa/yumbo.jp/public_html/wp-settings.php(450): do_action('init')
#6 /home/sandyspa/yumbo.jp/public_html/wp-config.php(98): require_once('/home/sandyspa/...')
#7 /home/sandyspa/yumbo.jp/public_html/wp-load.php(37): require_once('/home/sandyspa/...')
#8 /home/sandyspa/yumbo.jp/public_html/wp-blog-header.php(13): require_once('/home/sandyspa/.. in <b>/home/sandyspa/yumbo.jp/public_html/wp-includes/class-wp-widget-factory.php</b> on line <b>100</b><br />