implode arrays in loop foreach but the result is double php - php

Question

I want to get data from an array according to the code of the item above. but the array that I made actually produces a double result. the data array that I can only fit is the item
$query = "SELECT IDBRG,Disc FROM $RTL.tmasterbarang1 WHERE IDBRG IN (1167646,1170635,1170634)";
// echo $query;
$result = mysqli_query($connect, $query);
while($row = mysqli_fetch_array($result))
{
$a = $row['IDBRG'];
$b = $row['Disc'];
$arr1 = str_split($b);
foreach($arr1 as $x=>$x_value)
{
echo "<br>";
$queryz = "SELECT CAT_DISC_NBR FROM $RTL.cat_disc_test WHERE FLR_NBR = 1 AND CAT_DISC_CD = '".$x_value."' ";
// echo $queryz;
$resultz = mysqli_query($connect, $queryz);
$rowz = mysqli_fetch_array($resultz);
$elements[] = $rowz['CAT_DISC_NBR'];
}
echo $all = implode(',', $elements);
}
result of print_r($arr1)."<br>";
1. Array ( [0] => Y [1] => 4 [2] => S [3] => V )
2. Array ( [0] => Y [1] => 4 [2] => S [3] => V )
3. Array ( [0] => Y [1] => G [2] => 3 )
// and the each of array have value Y=69, 4=39, S=66, V=66, G=51, 3=38
echo $all = implode(',', $elements);
69,39,63,66
69,39,63,66,69,39,63,66
69,39,63,66,69,39,63,66,69,51,38
// i want it should be
69,39,63,66
69,39,63,66
69,51,38

Answer 1

When you add the data at
$elements[] = $rowz['CAT_DISC_NBR'];
this just keeps on adding data and the $elements array is never cleared out, so the next loop will just keep on adding data to the results of the last loop.
You need something like...
$a = $row['IDBRG'];
$b = $row['Disc'];
$arr1 = str_split($b);
$elements = []; // Reset list

Answer 2

This happens because you are adding data to elements every time and you never set it to empty again. You should empty the elements array before each foreach loop:
$elements=[];
foreach($arr1 as $x=>$x_value)
{
echo "<br>";
$queryz = "SELECT CAT_DISC_NBR FROM $RTL.cat_disc_test WHERE FLR_NBR = 1 AND CAT_DISC_CD = '".$x_value."' ";
// echo $queryz;
$resultz = mysqli_query($connect, $queryz);
$rowz = mysqli_fetch_array($resultz);
$elements[] = $rowz['CAT_DISC_NBR'];
}