Выполнение четырех запросов на три базы данных в PHP

Я новичок в PHP и MySQL и занимаюсь вещами, которые я читал в разных местах, которым мне удалось расколоть этот script, к сожалению, результат не совсем то, что я ожидал, я получаю много

Buffer Status 2H: Notice: Undefined variable: row in /var/www/secretbit/allbuff.php on line 53 0 records. <br />
Buffer Status TC: Notice: Undefined variable: row in /var/www/secretbit/allbuff.php on line 54 0 records. <br />
Buffer Status ST: Notice: Undefined variable: row in /var/www/secretbit/allbuff.php on line 55 0 records. <br />
Buffer Status 3C: Notice: Undefined variable: row in /var/www/secretbit/allbuff.php on line 56 0 records <br />

И вот код, который я использовал для компиляции этого монстра:

 <?php

 error_reporting(-1);
 ini_set('display_errors', true);

 $con = mysqli_connect(
   '192.168.20.10',
   'root2',
   'password',
   'contaque'
 );

 $con2 = mysqli_connect(
   '192.168.20.222',
   'root2',
   'password',
   'contaque'
 );

 $con3 = mysqli_connect(
   '192.168.20.8',
   'root2',
   'password',
   'contaque'
 );

 $res = mysqli_query(
 $con,
  "SELECT COUNT(*) AS 'total1' FROM contaque_hopper WHERE  campaign_id = 'CLOSERUK';"
 );

 $res = mysqli_query(
 $con2,
  "SELECT COUNT(*) AS 'total2' FROM contaque_hopper WHERE  campaign_id = 'CLOSERTC';"
 );

 $res = mysqli_query(
 $con2,
  "SELECT COUNT(*) AS 'total3' FROM contaque_hopper WHERE  campaign_id = 'CLOSERST';"
 );

 $res = mysqli_query(
 $con3,
  "SELECT COUNT(*) AS 'total4' FROM contaque_hopper WHERE  campaign_id = 'CLOSER3C';"
 );

 echo 'Buffer Status 2H: ', (int)$row['total1'], ' records. <br />';
 echo 'Buffer Status TC: ', (int)$row['total2'], ' records. <br />';
 echo 'Buffer Status ST: ', (int)$row['total3'], ' records. <br />';
 echo 'Buffer Status 3C: ', (int)$row['total4'], ' records. <br />';

 ?>