Sum Array Value of Duplicate Data in PHP

unique_multidim_array.php

<?php
/* -------------------------------------------------------------------------
Penjelasan sintaks: Digunakan untuk grouping array key "serial_no" sekaligus 
mengakumulasi array key "qty" dengan "serial_no" yang sama.
---------------------------------------------------------------------------*/
$array = [
    ['serial_no' => '009-AZ', 'name' => 'BSI COIL Z009 1000-PCE', 'qty' => 91],
    ['serial_no' => '009-AZ', 'name' => 'BSI COIL Z009 1000-PCE', 'qty' => 20],
    ['serial_no' => '009-AZ', 'name' => 'BSI COIL Z009 1000-PCE', 'qty' => 102],
    ['serial_no' => '049-BZ', 'name' => 'GEM COIL Z100 0900-CSE', 'qty' => 91],
    ['serial_no' => '019-PG', 'name' => 'PGI COIL GL02 0922-ZEE', 'qty' => 18],
];
echo "<pre>";
print_r($array);

function unique_multidim_array($array, $key, $addedKey) { 
    $temp_array = [];
    $key_array = []; 
    $i = 0;  

    foreach($array as $val) { 
        if (!in_array($val[$key], $key_array)) { 
            $key_array[$i] = $val[$key]; 
            $temp_array[$i] = $val; 
        }else{
            $pkey = array_search($val[$key],$key_array);
            $temp_array[$pkey][$addedKey] += $val[$addedKey];
            // die;
        }
        $i++; 
    } 
    return $temp_array; 
} 

$nArray = unique_multidim_array($array,"serial_no","qty");
// die;
echo "<br>";
print_r($nArray);
die;
echo "</pre>";
?>