PHP - Sum of array values based on key - php

Question

Below is the array output which shows user data, month wise. I need to get the sum of ACTUAL_HOURS for different resources.
For below, sum of ACTUAL_HOURS for User 1 and User 2 for the month JUL-2015, should be 10 + 20 = 30.
Same goes for AUG-2015 which is 80 + 20 = 100
$user_array output
Array
(
[User 1] => Array
(
[JUL-2015] => Array
(
[SITE_STATUS] => Offshore
[ACTUAL_HOURS] => 10
[PROJECTED_HOURS] => 20
)
[AUG-2015] => Array
(
[SITE_STATUS] => Offshore
[ACTUAL_HOURS] => 80
[PROJECTED_HOURS] => 88
)
)
[User 2] => Array
(
[JUL-2015] => Array
(
[SITE_STATUS] => Offshore
[ACTUAL_HOURS] => 20
[PROJECTED_HOURS] => 0
)
[AUG-2015] => Array
(
[SITE_STATUS] => Offshore
[ACTUAL_HOURS] => 20
[PROJECTED_HOURS] => 0
)
)
)
$project_months output
Array
(
[0] => JUL-2015
[1] => AUG-2015
)
Looping the data like below gives summation but not for User 1
foreach ($user_array as $user_name => $user_data) {
foreach ($project_months as $month) {
}
}
How do I show summation of ACTUAL_HOURS or PROJECTED_HOURS for different resource month wise as shown above ?

Answer 1

You can simply use two foreach loops.
$hoursInMonth = array();
foreach ($users as $user)
{
foreach ($user as $month => $userData) {
$hoursInMonth[$month] += $userData['ACTUAL_HOURS'];
}
}
Considering the $users variable is the array from the question, this yields the following result:
Array
(
[JUL-2015] => 30
[AUG-2015] => 100
)
You could wrap it in a function, so you can easily switch between the desired index.
/**
* #param array $inputArray The input array
* #param string $typeOfHours The desired index
* #return array
*/
function calculateHoursInMonths(array $inputArray, $typeOfHours)
{
$hoursInMonth = array();
foreach ($inputArray as $user)
{
foreach ($user as $month => $userData) {
$hoursInMonth[$month] += $userData[$typeOfHours];
}
}
return $hoursInMonth;
}
Note, this does not take in consideration the Offshore/Onshore state. You can add that by adding a simple if.

Answer 2

You are doing it wrong. There is no need for two nested foreach loops. You just need a for loop to loop through project months and a foreach loop to loop through users array.
You did not shared the array in php code, but I assume you are array is as below:
$array = array(
'User 1' => array(
'JUL-2015' => array(
'SITES_STATUS' => 'Offshore',
'ACTUAL_HOURS' => 10,
'PROJECTED_HOURS' => 20
),
'AUG-2015' => array(
'SITES_STATUS' => 'Offshore',
'ACTUAL_HOURS' => 80,
'PROJECTED_HOURS' => 88
),
),
'User 2' => array(
'JUL-2015' => array(
'SITES_STATUS' => 'Offshore',
'ACTUAL_HOURS' => 20,
'PROJECTED_HOURS' => 0
),
'AUG-2015' => array(
'SITES_STATUS' => 'Offshore',
'ACTUAL_HOURS' => 20,
'PROJECTED_HOURS' => 0
),
),
);
And months are below:
$project_months = array('JUL-2015', 'AUG-2015');
Now to calculate total actual hours for all users for each month, you will need loops like below:
for ($i=0; $i < count($project_months); $i++) {
$totalActualHours = 0;
foreach($array AS $ar) {
$totalActualHours += $ar[$project_months[$i]]['ACTUAL_HOURS'];
}
echo $project_months[$i].': '.$totalActualHours.'<br>';
}
The output of this code when run for ACTUAL_HOURS:
JUL-2015: 30
AUG-2015: 100
Hope this will help.