# maintenance_nag()

URL: https://chugunov.pro/api-wordpress/functions/maintenance_nag/
Проверено на WordPress 6.9, обновлено 06.08.2026.
Источник: независимый русскоязычный справочник chugunov.pro. Не является официальной документацией WordPress.

Тип: функция.
Появился в версии: 2.7.0.

## Сигнатура

```php
maintenance_nag(): void|false
```

## Описание

Отображает HTML-сообщение с напоминанием о режиме обслуживания.

## Возвращаемое значение

`void|false`

## Исходный код

Файл: `wp-admin/includes/update.php:853`

```php
function maintenance_nag() {
	global $upgrading;

	$nag = isset( $upgrading );

	if ( ! $nag ) {
		$failed = get_site_option( 'auto_core_update_failed' );
		/*
		 * If an update failed critically, we may have copied over version.php but not other files.
		 * In that case, if the installation claims we're running the version we attempted, nag.
		 * This is serious enough to err on the side of nagging.
		 *
		 * If we simply failed to update before we tried to copy any files, then assume things are
		 * OK if they are now running the latest.
		 *
		 * This flag is cleared whenever a successful update occurs using Core_Upgrader.
		 */
		$comparison = ! empty( $failed['critical'] ) ? '>=' : '>';
		if ( isset( $failed['attempted'] ) && version_compare( $failed['attempted'], wp_get_wp_version(), $comparison ) ) {
			$nag = true;
		}
	}

	if ( ! $nag ) {
		return false;
	}

	if ( current_user_can( 'update_core' ) ) {
		$msg = sprintf(
			/* translators: %s: URL to WordPress Updates screen. */
			__( 'An automated WordPress update has failed to complete - <a href="%s">please attempt the update again now</a>.' ),
			'update-core.php'
		);
	} else {
		$msg = __( 'An automated WordPress update has failed to complete! Please notify the site administrator.' );
	}

	wp_admin_notice(
		$msg,
		array(
			'type'               => 'warning',
			'additional_classes' => array( 'update-nag', 'inline' ),
			'paragraph_wrap'     => false,
		)
	);
}
```

## История изменений

- 2.7.0 — Introduced.

## Связанные

Использует: [`wp_get_wp_version`](https://chugunov.pro/api-wordpress/functions/wp_get_wp_version/), [`wp_admin_notice`](https://chugunov.pro/api-wordpress/functions/wp_admin_notice/), [`current_user_can`](https://chugunov.pro/api-wordpress/functions/current_user_can/), [`__`](https://chugunov.pro/api-wordpress/functions/__/), [`get_site_option`](https://chugunov.pro/api-wordpress/functions/get_site_option/).

Оригинал в официальной документации: https://developer.wordpress.org/reference/functions/maintenance_nag/