Проблема с выводом числа в PHP

$traun['chash']='0,0,0,0,0'

<?php
$chash=explode(",",$traun['chash']);
 
$chash[1]+=3
?>
<?=$chash[1]*3?>

mysql_query("UPDATE user SET `chash`=`chash`+'".$chash[1]."' ;");

$traun['chash']='9'

$traun['chash']='0,9,0,0,0'

$array = [];
 
$traun['chash']='0,0,0,0,0';
$array = explode(',',$traun['chash']);
$array[1] += 3;
$array[1] *= 3;
$traun['chash'] = implode(',',$array);
 
 
var_dump($traun['chash']);

$traun['chash']='0,9,0,0,0';

$traun['chash']='0,18,0,0,0';

$traun['chash']='8';

$traun['chash']='18';

$array = [];
 
$traun['chash']='0,0,0,0,0';
$array = explode(',',$traun['chash']);
$array[1] += 3;
$array[1] *= 3;
$traun['chash'] = implode(',',$array);
 
 
var_dump($traun['chash']);

$array = [];
 
$traun['chash']='0,0,0,0,0';
$array = explode(',',$traun['chash']);
$array[1] += 9;
$traun['chash'] = implode(',',$array);
 
$chash = $traun['chash'];
mysql_query("UPDATE user SET `chash` = $chash");

$array = [];
 
$traun['chash']='0,0,0,0,0';
$array = explode(',',$traun['chash']);
$array[1] += 9;
$traun['chash'] = implode(',',$array);
 
$chash = $traun['chash'];
mysql_query("UPDATE user SET `chash` = $chash");

 $array = [];

$traun['chash']='0,0,0,0,0';

$traun['chash']='0,9,0,0,0';

mysql_query("UPDATE user SET `chash` = '$chash'")

 
$traun['chash']='0,0,0,0,0';
$array = explode(',',$traun['chash']);
$array[1] += 9;
$traun['chash'] = implode(',',$array);
 
$chash = $traun['chash'];
mysql_query("UPDATE user SET `chash` = '$chash' ");

$traun['chash']='0,9,0,0,0';

$traun['chash']='0,18,0,0,0';

// $conn это Ваше подключение к БД 
$sql = "SELECT chash FROM user LIMIT 1"; // обращаю внимание что я беру первое значение с таблицы user (может нужно по другому)
$result = mysql_query($conn, $sql);
 
if (mysql_num_rows($result) > 0) {
   $row = mysql_fetch_assoc($result);
   var_dump($row);  // здесь ваш 0,9,0,0,0
 
   // далее по коду что бы написан выше этого поста
}