Total for columns in a table - php

Question

I want to calculate the totals for a series of columns in a table, how do I go about doing this?
Here is a sample of the data I want to sum:
array:1 [
"traders" => array:6 [
"Jim Mayor__targeted_target" => array:2 [
"amounts" => array:13 [
0 => 5
1 => 5
2 => 0
3 => 0
4 => 0
5 => 0
6 => 0
7 => 0
8 => 0
9 => 0
10 => 0
11 => 0
]
"row_name" => "Targeted target"
]
"Jim Mayor__actual_targeted" => array:2 [
"amounts" => array:13 [
0 => 0
1 => 1
2 => 0
3 => 0
4 => 0
5 => 0
6 => 1
7 => 1
8 => 0
9 => 0
10 => 0
11 => 0
]
"row_name" => "Actual targeted"
]
"Bob Martinez__targeted_target" => array:2 [
"amounts" => array:13 [
0 => 1
1 => 0
2 => 0
3 => 0
4 => 0
5 => 0
6 => 0
7 => 0
8 => 0
9 => 0
10 => 0
11 => 0
]
"row_name" => "Targeted target"
]
"Bob Martinez__actual_targeted" => array:2 [
"amounts" => array:13 [
0 => 19
1 => 45
2 => 20
3 => 26
4 => 21
5 => 10
6 => 12
7 => 20
8 => 11
9 => 2
10 => 0
11 => 0
]
"row_name" => "Actual targeted"
]
...
I want to sum together each index, e.g. for Jim Mayor__targeted_target, index 0 added to index 0 of Bob Martinez__targeted_target (this gives the total for January). It needs to work with an unlimited number of traders.
The function that generates the data:
protected function addRow($func, $params, $data, $year, $traderName, $rowName, $type, $image = null, $format = null, $underline = false)
{
$date = Carbon::createFromDate($year, 4, 1);
$total = 0;
$traderName = $traderName . '__' . str_replace(' ', '_', strtolower($rowName));
for ($i = 1; $i < 13; $i++) {
$params[1] = $date->year;
$params[2] = $date->month;
$result = call_user_func_array($func, $params);
$data['traders'][$traderName]['amounts'][] = $result ? $result : 0;
$total += $result;
$date->addMonth();
}
$data['traders'][$traderName]['amounts'][] = $total;
$data['traders'][$traderName]['row_name'] = $rowName;
return $data;
}

Answer 1

Just go over your data and save results in an additional array:
$results = array();
foreach ($traders as $trader) {
foreach ($trader['amounts'] as $i => $amount) {
if (!isset($results[$i])) {
$results[$i] = 0;
}
$results[$i] += $amount;
}
}
The result array will contains the sums of all traders.
Not tested but should work.

Answer 2

Do something like this:
function sumRowsByMonth($traders)
{
$sums = array_fill(0, 12, 0);
foreach($traders as $trader) {
foreach($trader['amounts'] as $monthId => $amount) {
$sums[$monthId] += $amount;
}
}
return $sums;
}
I tested with this:
$arr = array(
'traders' => array(
'Jim Mayor__targeted_target' => array(
'amounts' => array(
0 => 5,
1 => 5,
2 => 0,
3 => 0,
4 => 0,
5 => 0,
6 => 0,
7 => 0,
8 => 0,
9 => 0,
10 => 0,
11 => 0,
)
),
'Bob Martinez__targeted_target' => array(
'amounts' => array(
0 => 19,
1 => 45,
2 => 20,
3 => 26,
4 => 21,
5 => 10,
6 => 12,
7 => 20,
8 => 11,
9 => 2,
10 => 0,
11 => 0,
)
),
),
);
var_dump(sumRowsByMonth($arr['traders']));

Answer 3

Use array_sum() function.
array_sum() returns the sum of values in an array
Also, you said you want to count targeted target and actual targeted separately.
$actual = [];
$targeted = [];
foreach ($traders as $trader) {
$sum = array_sum($trader['anmounts']);
$trader['row_name'] === 'Actual targeted') ? $actual += $sum : $target += $sum;
}
Maybe you'll need to modify this a little bit to tune behavior, but I guess I got the idea.

Answer 4

#imperium2335:
The main problem I keep getting that it is summing all rows, including actual_targeted. actual_targeted needs to be grouped and summed separately to targeted_target.
Then do this:
function sumRowsByMonth($traders)
{
$sums = array();
foreach($traders as $traderName => $trader) {
$type = strstr($traderName, '__');
if( empty($sums[$type]) ) {
$sums[$type] = array_fill(0, 12, 0);
}
foreach($trader['amounts'] as $monthId => $amount) {
$sums[$type][$monthId] += $amount;
}
}
return $sums;
}
Read this:
http://php.net/manual/en/function.strstr.php