Автоудаление пользователя через определенное время после регистрации

    if( intval( $config['max_users_day'] ) ) {
        $thisdate = $_TIME - ($config['max_users_day'] * 3600 * 24);
        
        $sql_result = $db->query( "SELECT name, user_id, foto FROM " . USERPREFIX . "_users WHERE lastdate < '$thisdate' and user_group = '4'" );
        
        while ( $row = $db->get_row( $sql_result ) ) {

            $db->query( "DELETE FROM " . USERPREFIX . "_pm WHERE user_from = '{$row['name']}' AND folder = 'outbox'" );
            $db->query( "DELETE FROM " . USERPREFIX . "_pm WHERE user='{$row['user_id']}'" );
            $db->query( "DELETE FROM " . USERPREFIX . "_banned WHERE users_id='{$row['user_id']}'" );
            $db->query( "DELETE FROM " . USERPREFIX . "_users WHERE user_id = '{$row['user_id']}'" );
            @unlink( ROOT_DIR . "/uploads/fotos/" . $row['foto'] );
        }

        $db->free( $sql_result );
        
    }

$sql_result = $db->query( "SELECT name, user_id, foto FROM " . USERPREFIX . "_users WHERE reg_date > '$thisdate' and user_group = '4'" );

$thisdate = $_TIME - ($config['max_users_day'] * 3600 * 24);

//для оповещений до удаления
        include_once ENGINE_DIR . '/classes/mail.class.php';
        $mail = new dle_mail( $config );
        $timenotif = $thisdate + (7 * 3600 * 24);
        $sql_notif = $db->query( "SELECT email, name, user_id, foto FROM " . USERPREFIX . "_users WHERE lastdate < '$timenotif' and user_group = '4'" );
        while ( $row = $db->get_row( $sql_notif ) ) {$mail->send( $row['email'], "заголовок сообщения", "текст сообщения" );}
    $db->free($sql_notif);