_update_message_text($msg_type, $msg_reason, $langcode = NULL)
Returns the appropriate message text when site is out of date or not secure.
These error messages are shared by both update_requirements() for the site-wide status report at admin/reports/status and in the body of the notification email messages generated by update_cron().
Parameters
$msg_type: String to indicate what kind of message to generate. Can be either 'core' or 'contrib'.
$msg_reason: Integer constant specifying why messag