# update_nag()

URL: https://chugunov.pro/api-wordpress/functions/update_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: 2.3.0.

## Сигнатура

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

## Описание

Возвращает уведомление об обновлении ядра.

## Возвращаемое значение

`void|false`

## Исходный код

Файл: `wp-admin/includes/update.php:302`

```php
function update_nag() {
	global $pagenow;

	if ( is_multisite() && ! current_user_can( 'update_core' ) ) {
		return false;
	}

	if ( 'update-core.php' === $pagenow ) {
		return;
	}

	$cur = get_preferred_from_update_core();

	if ( ! isset( $cur->response ) || 'upgrade' !== $cur->response ) {
		return false;
	}

	$version_url = sprintf(
		/* translators: %s: WordPress version. */
		esc_url( __( 'https://wordpress.org/documentation/wordpress-version/version-%s/' ) ),
		sanitize_title( $cur->current )
	);

	if ( current_user_can( 'update_core' ) ) {
		$msg = sprintf(
			/* translators: 1: URL to WordPress release notes, 2: New WordPress version, 3: URL to network admin, 4: Accessibility text. */
			__( '<a href="%1$s">WordPress %2$s</a> is available! <a href="%3$s" aria-label="%4$s">Please update now</a>.' ),
			$version_url,
			$cur->current,
			network_admin_url( 'update-core.php' ),
			esc_attr__( 'Please update WordPress now' )
		);
	} else {
		$msg = sprintf(
			/* translators: 1: URL to WordPress release notes, 2: New WordPress version. */
			__( '<a href="%1$s">WordPress %2$s</a> is available! Please notify the site administrator.' ),
			$version_url,
			$cur->current
		);
	}

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

## История изменений

- 2.3.0 — Introduced.

## Связанные

Использует: [`wp_admin_notice`](https://chugunov.pro/api-wordpress/functions/wp_admin_notice/), [`get_preferred_from_update_core`](https://chugunov.pro/api-wordpress/functions/get_preferred_from_update_core/), [`esc_attr__`](https://chugunov.pro/api-wordpress/functions/esc_attr__/), [`sanitize_title`](https://chugunov.pro/api-wordpress/functions/sanitize_title/), [`network_admin_url`](https://chugunov.pro/api-wordpress/functions/network_admin_url/), [`current_user_can`](https://chugunov.pro/api-wordpress/functions/current_user_can/), [`__`](https://chugunov.pro/api-wordpress/functions/__/), [`esc_url`](https://chugunov.pro/api-wordpress/functions/esc_url/), [`is_multisite`](https://chugunov.pro/api-wordpress/functions/is_multisite/).

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