This is actually a extended version of the original code posted by @RomanPerekhrest here: Grouping multidimensional PHP array and calculating sum of a particular key for each arrays element
I played with the code and tried to extend it to next level. And to some extent I succeeded.
What is did is that I added one more sub array called "holders" in addition to the existing "companies" sub array. And then calculated the sum of "capacity_share" from "companies" sub array and "holder_share" from "holders" sub array.
And it worked like a charm. I am adding the extended code below:
Consider the below array assigned to variable: $projects_group_by_year
Array
(
[2016] => Array
(
[0] => Array
(
[id] => 1
[project_name] => P1
[project_capacity] => 100
[year_actual] => 2016
[companies] => Array
(
[0] => Array
(
[id] => 1
[project_id] => 1
[company_type] => C1
[capacity_share] => 12
[project_year] => 2016
)
[1] => Array
(
[id] => 2
[project_id] => 1
[company_type] => C1
[capacity_share] => 14
[project_year] => 2016
)
),
[holders] => Array
(
[0] => Array
(
[id] => 1
[project_id] => 1
[holder_type] => H1
[holder_share] => 12
[project_year] => 2016
)
[1] => Array
(
[id] => 2
[project_id] => 1
[holder_type] => H2
[holder_share] => 14
[project_year] => 2016
)
)
)
[1] => Array
(
[id] => 2
[project_name] => P2
[project_capacity] => 200
[year_actual] => 2016
[companies] => Array
(
[0] => Array
(
[id] => 3
[project_id] => 2
[company_type] => C2
[capacity_share] => 15
[project_year] => 2016
)
[1] => Array
(
[id] => 4
[project_id] => 2
[company_type] => C1
[capacity_share] => 16
[project_year] => 2016
)
),
[holders] => Array
(
[0] => Array
(
[id] => 3
[project_id] => 2
[holder_type] => H1
[holder_share] => 12
[project_year] => 2016
)
[1] => Array
(
[id] => 4
[project_id] => 2
[holder_type] => H2
[holder_share] => 14
[project_year] => 2016
)
)
)
)
[2014] => Array
(
[0] => Array
(
[id] => 3
[project_name] => P3
[project_capacity] => 300
[year_actual] => 2014
[companies] => Array
(
[0] => Array
(
[id] => 5
[project_id] => 3
[company_type] => C1
[capacity_share] => 20
[project_year] => 2014
)
[1] => Array
(
[id] => 6
[project_id] => 3
[company_type] => C2
[capacity_share] => 22
[project_year] => 2014
)
),
[holders] => Array
(
[0] => Array
(
[id] => 5
[project_id] => 3
[holder_type] => H1
[holder_share] => 12
[project_year] => 2014
)
[1] => Array
(
[id] => 6
[project_id] => 3
[holder_type] => H2
[holder_share] => 14
[project_year] => 2014
)
)
)
[1] => Array
(
[id] => 4
[project_name] => P4
[project_capacity] => 400
[year_actual] => 2014
[companies] => Array
(
[0] => Array
(
[id] => 7
[project_id] => 4
[company_type] => C2
[capacity_share] => 11
[project_year] => 2014
)
[1] => Array
(
[id] => 8
[project_id] => 4
[company_type] => C1
[capacity_share] => 10
[project_year] => 2014
)
),
[holders] => Array
(
[0] => Array
(
[id] => 7
[project_id] => 4
[holder_type] => H1
[holder_share] => 12
[project_year] => 2014
)
[1] => Array
(
[id] => 8
[project_id] => 4
[holder_type] => H2
[holder_share] => 14
[project_year] => 2014
)
)
)
)
)
And using code below I get the perfect result:
$sumData = array_map('prepare_data', $projects_group_by_year);
print_r($sumData);
exit;
function prepare_data($v) {
$arr = ['year' => current(array_column($v, 'year_actual'))];
$arr['project_capacity_sum'] = array_sum(array_column($v, "project_capacity"));
$arr['C2_capacity_sum'] = $arr['C1_capacity_sum'] = 0;
$arr['H2_capacity_sum'] = $arr['H1_capacity_sum'] = 0;
foreach ($v as $item) {// iterating through the nested items
$c_capacities = array_column($item['companies'], 'capacity_share', 'company_type');
$arr['C1_capacity_sum'] += $c_capacities['C1'];
$arr['C2_capacity_sum'] += $c_capacities['C2'];
$h_shares = array_column($item['holders'], 'holder_share', 'holder_type');
$arr['H1_share_sum'] += $h_shares['H1'];
$arr['H2_share_sum'] += $h_shares['H2'];
}
return $arr;
}
But my code is not working well under two conditions:
First condition:
If I add all sub arrays with same [company_type] => value pair. Then it displays following notice:
Notice: Undefined index: C2
[companies] => Array
(
[0] => Array
(
[id] => 1
[project_id] => 1
[company_type] => C1 //Notice here
[capacity_share] => 12
[project_year] => 2016
)
[1] => Array
(
[id] => 2
[project_id] => 1
[company_type] => C1 //Notice here
[capacity_share] => 14
[project_year] => 2016
)
)
Second Condition:
If I add more than one sub array with same [company_type] => value pair, then it only considers the last [company_type] => value pair for adding the [capacity_share]. For example, it uses [capacity_share] => 15 in the case below and does not consider [capacity_share] => 14.
[companies] => Array
(
[0] => Array
(
[id] => 1
[project_id] => 1
[company_type] => C1
[capacity_share] => 12
[project_year] => 2016
)
[1] => Array
(
[id] => 2
[project_id] => 1
[company_type] => C2 //Notice here
[capacity_share] => 14
[project_year] => 2016
),
[2] => Array
(
[id] => 3
[project_id] => 1
[company_type] => C2 //Notice here
[capacity_share] => 15
[project_year] => 2016
)
)
I am working on fixing above issues for past few days.
Below is one of the code snippets I tried to make this work:
function prepare_data($v) {
$arr = ['year' => current(array_column($v, 'year_actual'))];
$arr['project_capacity_sum'] = array_sum(array_column($v, "project_capacity"));
$arr['C2_capacity_sum'] = $arr['C1_capacity_sum'] = 0;
$arr['H2_share_sum'] = $arr['H1_share_sum'] = 0;
foreach ($v as $item) {// iterating through the nested items
$c_capacities = array_column($item['companies'], 'capacity_share', 'company_type');
if(isset($c_capacities['company_type'])){
$arr['C1_capacity_sum'] += $c_capacities['company_type'];
}
if(isset($c_capacities['C2'])){
$arr['C2_capacity_sum'] += $c_capacities['C2'];
}
$h_shares = array_column($item['holders'], 'holder_share', 'holder_type');
$arr['H1_share_sum'] += $s_capacities['H1'];
$arr['H2_share_sum'] += $s_capacities['H2'];
}
return $arr;
}
Does any one know what I am doing wrong and how can I fix the above two issues?
Thanks.
