How to Sum Array Associative with 2 key values - php

Question

I'm try to Sum values with 2 keys condition in associative array, but didn't get any result and only not like expected.
my array:
Array
(
[0] => Array
(
[pid] => P1
[rid] => 1
[price] => 100
)
[1] => Array
(
[pid] => P1
[rid] => 1
[price] => 120
)
[2] => Array
(
[pid] => P1
[rid] => 1
[price] => 130
)
[3] => Array
(
[pid] => P2
[rid] => 1
[price] => 80
)
[4] => Array
(
[pid] => P2
[rid] => 1
[price] => 120
)
[5] => Array
(
[pid] => P2
[rid] => 2
[price] => 150
)
);
i have tried some code from
How to GROUP BY and SUM PHP Array? or Grouping arrays in PHP
and then the code becomes:
$groups = array();
foreach ($array as $item) {
$key = $item['pid'];
if (!array_key_exists($key,$groups)) {
$groups[$key] = array(
'pid' => $item['pid'],
'rid'=>$item['rid'],
'price' => $item['price']
);
} else {
$groups[$key]['price'] += $item['price'];
}
}
i exptected output array:
Array
(
[0] => Array
(
[pid] => P1
[rid] => 1
[price] => 350
)
[1] => Array
(
[pid] => P2
[rid] => 1
[price] => 200
)
[2] => Array
(
[pid] => P2
[rid] => 2
[price] => 150
)
);
I have no idea how to write with array_reduce as well as foreach to resolve this, please hit me by other refrence or help me to solve this.

Answer 1

If $data is your input array, you can use below code
$r = array();
foreach ( $data as $d ) {
$key = $d['pid'] . '-' . $d['rid'];
if( !isset ( $r[$key] ) ) {
$r[$key] = $d;
} else {
$r[$key]['price'] += $d['price'];
}
}
echo '<pre>';
print_r($r);
die;