WP_Automatic_Updater::send_core_update_notification_email( object $item ): bool

312	protected function send_core_update_notification_email( $item ) {313		$notified = get_site_option( 'auto_core_update_notified' );314 315		// Don't notify if we've already notified the same email address of the same version.316		if ( $notified317			&& get_site_option( 'admin_email' ) === $notified['email']318			&& $notified['version'] === $item->current319		) {320			return false;321		}322 323		// See if we need to notify users of a core update.324		$notify = ! empty( $item->notify_email );325 326		/**327		 * Filters whether to notify the site administrator of a new core update.328		 *329		 * By default, administrators are notified when the update offer received330		 * from WordPress.org sets a particular flag. This allows some discretion331		 * in if and when to notify.332		 *333		 * This filter is only evaluated once per release. If the same email address334		 * was already notified of the same new version, WordPress won't repeatedly335		 * email the administrator.336		 *337		 * This filter is also used on about.php to check if a plugin has disabled338		 * these notifications.339		 *340		 * @since 3.7.0341		 *342		 * @param bool   $notify Whether the site administrator is notified.343		 * @param object $item   The update offer.344		 */345		if ( ! apply_filters( 'send_core_update_notification_email', $notify, $item ) ) {346			return false;347		}348 349		$this->send_email( 'manual', $item );350		return true;351	}
When	Instructions	Calls it makes
`!apply_filters()`	15	`get_site_option(), apply_filters()`
always	17	`get_site_option(), get_site_option()`
`apply_filters()`	19	`get_site_option(), apply_filters(), ->send_email()`
`!apply_filters()`	21–25	`get_site_option(), get_site_option(), apply_filters()`
`apply_filters()`	25–29	`get_site_option(), get_site_option(), apply_filters(), ->send_email()`