Sum array elements in two dimensional array with duplicate element value - php

Question

I have a multi array that has some duplicated values that are same by payment_name ( payment_name is an element )
I want to sum quantity of each array that has same payment_name and display the amount as one. For now the sum comes as array of all amounts. Any assistance will be highly appreciated.
var_export($num) results looks like this
array(
'items' => array (
'2020-08-04' => array (
0 => array (
0 => array (
'payment_name' =>'Cash',
'amount_paid' => array (
0 => '0',
),
),
),
1 => 0,
),
'2020-08-05' => array (
0 => array(
0 => array (
'payment_name' => 'Cash',
'amount_paid' => array (
0 => '0',
1 => '0',
2 => '165',
),
),
1 => array (
'payment_name' => 'Mpesa',
'amount_paid' => array (
0 => '0',
1 => '0',
2 => '165',
),
),
),
1 => 165,
),
My expected array should be like this, the amount paid should be the total, not an array of all amounts:
"2020-08-05" => array:2 [▼
0 => array:2 [▼
0 => array:2 [▼
"payment_name" => "Cash"
"amount_paid" => "0"
]
1 => array:2 [▼
"payment_name" => "Mpesa"
"amount_paid" => "165"
]
]
]
1 => 165
]
My code is as below
$requests = $builder->get()->groupBy('date');
$num = $requests->map(function ($row) {
$result = array();
$ttl = $row->sum('amount_paid');
$row = $row->toArray();
$names = array_column($row, 'payment_name');
$amount = array_column($row, 'amount_paid');
$unique_modes = array_unique($names);
foreach ($unique_modes as $name) {
$this_keys = array_keys($names, $name);
$qty = array_sum((array_intersect_key($amount, array_combine($this_keys, $this_keys))));
$result[] = array("payment_name"=>$name, "amount_paid"=>$amount);
}
return [$result, $ttl ];
});
return $num;

Answer 1

I fixed my problem using the code below:
$num = $requests->map(function ($row) {
$result = array();
$ttl = $row->sum('amount_paid');
$row = $row->toArray();
$final_array = [];
foreach($row as $arr){
$final_array[$arr['payment_name']]['payment_name'] = $arr['payment_name'];
$final_array[$arr['payment_name']]['amount_paid'] = (isset($final_array[$arr['payment_name']]['amount_paid']))? $final_array[$arr['payment_name']]['amount_paid']+$arr['amount_paid'] : $arr['amount_paid'];
}
$final_array = array_values($final_array);
return [$final_array, $ttl];
});