nsient->translations as $translation ) {
			$updates[] = (object) $translation;
		}
	}

	return $updates;
}

/**
 * Collects counts and UI strings for available updates.
 *
 * @since 3.3.0
 *
 * @return array
 */
function wp_get_update_data() {
	$counts = array(
		'plugins'      => 0,
		'themes'       => 0,
		'wordpress'    => 0,
		'translations' => 0,
	);

	$plugins = current_user_can( 'update_plugins' );

	if ( $plugins ) {
		$update_plugins = get_site_transient( 'update_plugins' );

		if ( ! empty( $update_plugins->response ) ) {
			$counts['plugins'] = count( $update_plugins->response );
		}
	}

	$themes = current_user_can( 'update_themes' );

	if ( $themes ) {
		$update_themes = get_site_transient( 'update_themes' );

		if ( ! empty( $update_themes->response ) ) {
			$counts['themes'] = count( $update_themes->response );
		}
	}

	$core = current_user_can( 'update_core' );

	if ( $core && function_exists( 'get_core_updates' ) ) {
		$update_wordpress = get_core_updates( array( 'dismissed' => false ) );

		if ( ! empty( $update_wordpress )
			&& ! in_array( $update_wordpress[0]->response, array( 'development', 'latest' ), true )
			&& current_user_can( 'update_core' )
		) {
			$counts['wordpress'] = 1;
		}
	}

	if ( ( $core || $plugins || $themes ) && wp_get_translation_updates() ) {
		$counts['translations'] = 1;
	}

	$counts['total'] = $counts['plugins'] + $counts['themes'] + $counts['wordpress'] + $counts['translations'];
	$titles          = array();

	if ( $counts['wordpress'] ) {
		/* translators: %d: Number of available WordPress updates. */
		$titles['wordpress'] = sprintf( __( '%d WordPress Update' ), $counts['wordpress'] );
	}

	if ( $counts['plugins'] ) {
		/* translators: %d: Number of available plugin updates. */
		$titles['plugins'] = sprintf( _n( '%d Plugin Update', '%d Plugin Updates', $counts['plugins'] ), $counts['plugins'] );
	}

	if ( $counts['themes'] ) {
		/* translators: %d: Number of available theme updates. */
		$titles['themes'] = sprintf( _n( '%d Theme Update', '%d Theme Updates', $counts['themes'] ), $counts['themes'] );
	}

	if ( $counts['translations'] ) {
		$titles['translations'] = __( 'Translation Updates' );
	}

	$update_title = $titles ? esc_attr( implode( ', ', $titles ) ) : '';

	$update_data = array(
		'counts' => $counts,
		'title'  => $update_title,
	);
	/**
	 * Filters the returned array of update data for plugins, themes, and WordPress core.
	 *
	 * @since 3.5.0
	 *
	 * @param array $update_data {
	 *     Fetched update data.
	 *
	 *     @type array   $counts       An array of counts for available plugin, theme, and WordPress updates.
	 *     @type string  $update_title Titles of available updates.
	 * }
	 * @param array $titles An array of update counts and UI strings for available updates.
	 */
	return apply_filters( 'wp_get_update_data', $update_data, $titles );
}

/**
 * Determines whether core should be updated.
 *
 * @since 2.8.0
 *
 * @global string $wp_version The WordPress version string.
 */
function _maybe_update_core() {
	// Include an unmodified $wp_version.
	require ABSPATH . WPINC . '/version.php';

	$current = get_site_transient( 'update_core' );

	if ( isset( $current->last_checked, $current->version_checked )
		&& 12 * HOUR_IN_SECONDS > ( time() - $current->last_checked )
		&& $current->version_checked === $wp_version
	) {
		return;
	}

	wp_version_check();
}
/**
 * Checks the last time plugins were run before checking plugin versions.
 *
 * This might have been backported to WordPress 2.6.1 for performance reasons.
 * This is used for the wp-admin to check only so often instead of every page
 * load.
 *
 * @since 2.7.0
 * @access private
 */
function _maybe_update_plugins() {
	$current = get_site_transient( 'update_plugins' );

	if ( isset( $current->last_checked )
		&& 12 * HOUR_IN_SECONDS > ( time() - $current->last_checked )
	) {
		return;
	}

	wp_update_plugins();
}

/**
 * Checks themes versions only after a duration of time.
 *
 * This is for performance reasons to make sure that on the theme version
 * checker is not run on every page load.
 *
 * @since 2.7.0
 * @access private
 */
function _maybe_update_themes() {
	$current = get_site_transient( 'update_themes' );

	if ( isset( $current->last_checked )
		&& 12 * HOUR_IN_SECONDS > ( time() - $current->last_checked )
	) {
		return;
	}

	wp_update_themes();
}

/**
 * Schedules core, theme, and plugin update checks.
 *
 * @since 3.1.0
 */
function wp_schedule_update_checks() {
	if ( ! wp_next_scheduled( 'wp_version_check' ) && ! wp_installing() ) {
		wp_schedule_event( time(), 'twicedaily', 'wp_version_check' );
	}

	if ( ! wp_next_scheduled( 'wp_update_plugins' ) && ! wp_installing() ) {
		wp_schedule_event( time(), 'twicedaily', 'wp_update_plugins' );
	}

	if ( ! wp_next_scheduled( 'wp_update_themes' ) && ! wp_installing() ) {
		wp_schedule_event( time(), 'twicedaily', 'wp_update_themes' );
	}
}

/**
 * Clears existing update caches for plugins, themes, and core.
 *
 * @since 4.1.0
 */
function wp_clean_update_cache() {
	if ( function_exists( 'wp_clean_plugins_cache' ) ) {
		wp_clean_plugins_cache();
	} else {
		delete_site_transient( 'update_plugins' );
	}

	wp_clean_themes_cache();

	delete_site_transient( 'update_core' );
}

/**
 * Schedules the removal of all contents in the temporary backup directory.
 *
 * @since 6.3.0
 */
function wp_delete_all_temp_backups() {
	/*
	 * Check if there is a lock, or if currently performing an Ajax request,
	 * in which case there is a chance an update is running.
	 * Reschedule for an hour from now and exit early.
	 */
	if ( get_option( 'core_updater.lock' ) || get_option( 'auto_updater.lock' ) || wp_doing_ajax() ) {
		wp_schedule_single_event( time() + HOUR_IN_SECONDS, 'wp_delete_temp_updater_backups' );
		return;
	}

	// This action runs on shutdown to make sure there are no plugin updates currently running.
	add_action( 'shutdown', '_wp_delete_all_temp_backups' );
}

/**
 * Deletes all contents in the temporary backup directory.
 *
 * @since 6.3.0
 *
 * @access private
 *
 * @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
 *
 * @return void|WP_Error Void on success, or a WP_Error object on failure.
 */
function _wp_delete_all_temp_backups() {
	global $wp_filesystem;

	if ( ! function_exists( 'WP_Filesystem' ) ) {
		require_once ABSPATH . '/wp-admin/includes/file.php';
	}

	ob_start();
	$credentials = request_filesystem_credentials( '' );
	ob_end_clean();

	if ( false === $credentials || ! WP_Filesystem( $credentials ) ) {
		return new WP_Error( 'fs_unavailable', __( 'Could not access filesystem.' ) );
	}

	if ( ! $wp_filesystem->wp_content_dir() ) {
		return new WP_Error(
			'fs_no_content_dir',
			/* translators: %s: Directory name. */
			sprintf( __( 'Unable to locate WordPress content directory (%s).' ), 'wp-content' )
		);
	}

	$temp_backup_dir = $wp_filesystem->wp_content_dir() . 'upgrade-temp-backup/';
	$dirlist         = $wp_filesystem->dirlist( $temp_backup_dir );
	$dirlist         = $dirlist ? $dirlist : array();

	foreach ( array_keys( $dirlist ) as $dir ) {
		if ( '.' === $dir || '..' === $dir ) {
			continue;
		}

		$wp_filesystem->delete( $temp_backup_dir . $dir, true );
	}
}

if ( ( ! is_main_site() && ! is_network_admin() ) || wp_doing_ajax() ) {
	return;
}

add_action( 'admin_init', '_maybe_update_core' );
add_action( 'wp_version_check', 'wp_version_check' );

add_action( 'load-plugins.php', 'wp_update_plugins' );
add_action( 'load-update.php', 'wp_update_plugins' );
add_action( 'load-update-core.php', 'wp_update_plugins' );
add_action( 'admin_init', '_maybe_update_plugins' );
add_action( 'wp_update_plugins', 'wp_update_plugins' );

add_action( 'load-themes.php', 'wp_update_themes' );
add_action( 'load-update.php', 'wp_update_themes' );
add_action( 'load-update-core.php', 'wp_update_themes' );
add_action( 'admin_init', '_maybe_update_themes' );
add_action( 'wp_update_themes', 'wp_update_themes' );

add_action( 'update_option_WPLANG', 'wp_clean_update_cache', 10, 0 );

add_action( 'wp_maybe_auto_update', 'wp_maybe_auto_update' );

add_action( 'init', 'wp_schedule_update_checks' );

add_action( 'wp_delete_temp_updater_backups', 'wp_delete_all_temp_backups' );
 && is_array( $_POST[ 'widget-' . $this->id_base ] ) ) {
				$settings = $_POST[ 'widget-' . $this->id_base ];
			} elseif ( isset( $_POST['id_base'] ) && $_POST['id_base'] === $this->id_base ) {
				$num      = $_POST['multi_number'] ? (int) $_POST['multi_number'] : (int) $_POST['widget_number'];
				$settings = array( $num => array() );
			} else {
				return;
			}

			foreach ( $settings as $number => $new_instance ) {
				$new_instance = stripslashes_deep( $new_instance );
				$this->_set( $number );

				$old_instance = isset( $all_instances[ $number ] ) ? $all_instances[ $number ] : array();

				$was_cache_addition_suspended = wp_suspend_cache_addition();
				if ( $this->is_preview() && ! $was_cache_addition_suspended ) {
					wp_suspend_cache_addition( true );
				}

				$instance = $this->update( $new_instance, $old_instance );

				if ( $this->is_preview() ) {
					wp_suspend_cache_addition( $was_cache_addition_suspended );
				}

				/**
				 * Filters a widget's settings before saving.
				 *
				 * Returning false will effectively short-circuit the widget's ability
				 * to update settings.
				 *
				 * @since 2.8.0
				 *
				 * @param array     $instance     The current widget instance's settings.
				 * @param array     $new_instance Array of new widget settings.
				 * @param array     $old_instance Array of old widget settings.
				 * @param WP_Widget $widget       The current widget instance.
				 */
				$instance = apply_filters( 'widget_update_callback', $instance, $new_instance, $old_instance, $this );

				if ( false !== $instance ) {
					$all_instances[ $number ] = $instance;
				}

				break; // Run only once.
			}
		}

		$this->save_settings( $all_instances );
		$this->updated = true;
	}

	/**
	 * Generates the widget control form (Do NOT override).
	 *
	 * @since 2.8.0
	 *
	 * @param int|array $widget_args {
	 *     Optional. Internal order number of the widget instance, or array of multi-widget arguments.
	 *     Default 1.
	 *
	 *     @type int $number Number increment used for multiples of the same widget.
	 * }
	 * @return string|null
	 */
	public function form_callback( $widget_args = 1 ) {
		if ( is_numeric( $widget_args ) ) {
			$widget_args = array( 'number' => $widget_args );
		}

		$widget_args   = wp_parse_args( $widget_args, array( 'number' => -1 ) );
		$all_instances = $this->get_settings();

		if ( -1 === $widget_args['number'] ) {
			// We echo out a form where 'number' can be set later.
			$this->_set( '__i__' );
			$instance = array();
		} else {
			$this->_set( $widget_args['number'] );
			$instance = $all_instances[ $widget_args['number'] ];
		}

		/**
		 * Filters the widget instance's settings before displaying the control form.
		 *
		 * Returning false effectively short-circuits display of the control form.
		 *
		 * @since 2.8.0
		 *
		 * @param array     $instance The current widget instance's settings.
		 * @param WP_Widget $widget   The current widget instance.
		 */
		$instance = apply_filters( 'widget_form_callback', $instance, $this );

		$return = null;

		if ( false !== $instance ) {
			$return = $this->form( $instance );

			/**
			 * Fires at the end of the widget control form.
			 *
			 * Use this hook to add extra fields to the widget form. The hook
			 * is only fired if the value passed to the 'widget_form_callback'
			 * hook is not false.
			 *
			 * Note: If the widget has no form, the text echoed from the default
			 * form method can be hidden using CSS.
			 *
			 * @since 2.8.0
			 *
			 * @param WP_Widget $widget   The widget instance (passed by reference).
			 * @param null      $return   Return null if new fields are added.
			 * @param array     $instance An array of the widget's settings.
			 */
			do_action_ref_array( 'in_widget_form', array( &$this, &$return, $instance ) );
		}

		return $return;
	}

	/**
	 * Registers an instance of the widget class.
	 *
	 * @since 2.8.0
	 *
	 * @param int $number Optional. The unique order number of this widget instance
	 *                    compared to other instances of the same class. Default -1.
	 */
	public function _register_one( $number = -1 ) {
		wp_register_sidebar_widget(
			$this->id,
			$this->name,
			$this->_get_display_callback(),
			$this->widget_options,
			array( 'number' => $number )
		);

		_register_widget_update_callback(
			$this->id_base,
			$this->_get_update_callback(),
			$this->control_options,
			array( 'number' => -1 )
		);

		_register_widget_form_callback(
			$this->id,
			$this->name,
			$this->_get_form_callback(),
			$this->control_options,
			array( 'number' => $number )
		);
	}

	/**
	 * Saves the settings for all instances of the widget class.
	 *
	 * @since 2.8.0
	 *
	 * @param array $settings Multi-dimensional array of widget instance settings.
	 */
	public function save_settings( $settings ) {
		$settings['_multiwidget'] = 1;
		update_option( $this->option_name, $settings );
	}

	/**
	 * Retrieves the settings for all instances of the widget class.
	 *
	 * @since 2.8.0
	 *
	 * @return array Multi-dimensional array of widget instance settings.
	 */
	public function get_settings() {

		$settings = get_option( $this->option_name );

		if ( false === $settings ) {
			$settings = array();
			if ( isset( $this->alt_option_name ) ) {
				// Get settings from alternative (legacy) option.
				$settings = get_option( $this->alt_option_name, array() );

				// Delete the alternative (legacy) option as the new option will be created using `$this->option_name`.
				delete_option( $this->alt_option_name );
			}
			// Save an option so it can be autoloaded next time.
			$this->save_settings( $settings );
		}

		if ( ! is_array( $settings ) && ! ( $settings instanceof ArrayObject || $settings instanceof ArrayIterator ) ) {
			$settings = array();
		}

		if ( ! empty( $settings ) && ! isset( $settings['_multiwidget'] ) ) {
			// Old format, convert if single widget.
			$settings = wp_convert_widget_settings( $this->id_base, $this->option_name, $settings );
		}

		unset( $settings['_multiwidget'], $settings['__i__'] );

		return $settings;
	}
}