WordPress at a glance
filter is not described

send_core_update_notification_email filter-hook . WP 3.7.0

Filters whether to notify the site administrator of a new core update.

By default, administrators are notified when the update offer received from WordPress.org sets a particular flag. This allows some discretion in if and when to notify.

This filter is only evaluated once per release. If the same email address was already notified of the same new version, WordPress won't repeatedly email the administrator.

This filter is also used on about.php to check if a plugin has disabled these notifications.

Usage

add_filter( 'send_core_update_notification_email', 'filter_function_name_971', 10, 2 );
function filter_function_name_971( $notify, $item ){
	// filter...

	return $notify;
}
$notify(true/false)
Whether the site administrator is notified.
$item(object)
The update offer.

Where the hook is called

WP_Automatic_Updater::send_core_update_notification_email()
send_core_update_notification_email
wp-admin/includes/class-wp-automatic-updater.php 236
if ( ! apply_filters( 'send_core_update_notification_email', $notify, $item ) )

Where the hook is used (in WP core)

Does not used.