Array value sum by key value php - php

Question

How can I check columnar values by associative key?
I want to check data by "building_id" . Here I have 2 buildings
then I want rent data as sum with group by "tenancy_rate"
Input array :
Array
(
[0] => Array
(
[id] => 34
[building_id] => 786
[tenancy_rate] => 0
[rent_per_room] => 10000
[management_fee_per_room] => 0
)
[1] => Array
(
[id] => 35
[building_id] => 786
[tenancy_rate] => 10
[rent_per_room] => 11810
[management_fee_per_room] => 5400
[rent] => 86050
)
[2] => Array
(
[id] => 36
[building_id] => 786
[tenancy_rate] => 20
[rent_per_room] => 11810
[management_fee_per_room] => 5400
[rent] => 86050
)
[3] => Array
(
[id] => 56
[building_id] => 798
[tenancy_rate] => 0
[rent_per_room] => 10000
[management_fee_per_room] => 5400
[rent] => 77000
)
[4] => Array
(
[id] => 57
[building_id] => 798
[tenancy_rate] => 10
[rent_per_room] => 11810
[management_fee_per_room] => 5400
[rent] => 86050
)
[5] => Array
(
[id] => 58
[building_id] => 798
[tenancy_rate] => 20
[rent_per_room] => 11810
[management_fee_per_room] => 5400
[rent] => 86050
)
)
Desired result :
Array
(
[0] => Array
(
[tenancy_rate] => 0
[rent] => 77000
)
[1] => Array
(
[tenancy_rate] => 10
[rent] => 172100
)
[2] => Array
(
[tenancy_rate] => 20
[rent] => 172100
)
)
For this I tried PHP code
But not getting any solution
$sumArray = array();
foreach ($myArray as $k=>$subArray) {
foreach ($subArray as $id=>$value) {
$sumArray[$id]+=$value;
}
}
print_r($sumArray);

Answer 1

Here is the snippet. To get the desired result you need to group by tenancy_rate and not by building id,
$result = [];
foreach ($arr as $val) {
// as I see, rent for some array not there, so setting it to 0
$val['rent'] = ($val['rent'] ?? 0);
if (isset($result[$val['tenancy_rate']]['rent'])) {
$result[$val['tenancy_rate']]['rent'] += $val['rent'];
} else {
$result[$val['tenancy_rate']] = [
'tenancy_rate' => $val['tenancy_rate'], 'rent' => $val['rent']];
}
}
print_r($result);
Demo
Output:-
Array
(
[0] => Array
(
[tenancy_rate] => 0
[rent] => 77000
)
[1] => Array
(
[tenancy_rate] => 10
[rent] => 172100
)
[2] => Array
(
[tenancy_rate] => 20
[rent] => 172100
)
)

Answer 2

You can use foreach and group by index tenancy_rate
$f = [];
foreach($a as $v){
if(!empty($f[$v['tenancy_rate']])){
$f[$v['tenancy_rate']]['rent'] += $v['rent'];
}else{
$f[$v['tenancy_rate']] = [
'tenancy_rate' => $v['tenancy_rate'],
'rent' => isset($v['rent']) ? $v['rent'] : 0
];
}
}
Working example :- https://3v4l.org/nWRGA
You can use array_values to re arrange the order of array

Answer 3

At first you need to use calculate rent sum for each tenancy rate:
$rentSums = [];
foreach ($input as $info) {
$tenancyRate = $info['tenancy_rate'] ?? 0;
$rent = $info['rent'] ?? 0;
$rentSum = $rentSums[$tenancyRate] ?? 0;
$rentSums[$tenancyRate] = $rentSum + $rent;
}
Then you can build the result using the data from previous step:
$result = [];
foreach ($rentSums as $tenancyRate => $rentSum) {
$result[] = [
'tenancy_rate' => $tenancyRate,
'rent' => $rentSum,
];
}

Answer 4

Using a function to return the necessary values (rate and rent), and accumulating the values into the sumArray array, making the assumption that the results array keys are related to the tenancy_rate (this allows for insertion of further tenancy_rates).
$sumArray = [];
function processBuildingInfo($building)
{
return [ $building['tenancy_rate']??0, $building['rent']??0 ];
}
foreach ($myArray as $k=>$subArray) {
list($rate, $rent) = processBuildingInfo($subArray);
$sumArray[$rate/10] = [
'tenancy_rate' => $rate,
'rent' => $sumArray[$rate/10]['rent'] + $rent
];
}
print_r($sumArray);

Answer 5

use this loop:
foreach ($myArray as $k=>$subArray) {
foreach ($subArray as $id=>$valueArray) {
$sumArray[$id]+=[
'tenancy_rate' => $valueArray['tenancy_rate'],
'rent' => $valueArray['rent']
];
}
}