How do I sum values in array from certain indexes in loop - php

Question

I'm trying to sum values from the array from certain ranges provided by another array.
I've tried with this function
function sumArray($array, $min, $max) {
$sum = 0;
foreach ($array as $k => $v) {
if ($k >= $min && $k <= $max) {
$sum += $v;
}
}
return $sum;
}
and this works if i hardcode numbers of course, but i can't figure out how to make this work in a loop
So I have this dates array
array(3) {
["June"]=> int(4)
["July"]=> int(31)
["August"]=> int(29)
}
and i have this daily_values array
array(64) {
[0]=> int(8)
[1]=> int(6)
[2]=> int(10)
[3]=> int(15)
[4]=> int(10)
[5]=> int(9)
[6]=> int(9)
.
.
.
[63] => int(10)
Now what I want to do here is:
based on how many entries are in for example June which is 4 in this case I want to get the sum of values in daily_values array like this:
first loop iteration will sum values in daily_values array from 0 to 3, the second loop iteration will sum values from 4 to 34 and third loop iteration will sum values from 35 to 63 and so on and so on.
So the final thing I want from all this is to have an array which will be like this
["sum of 0,3", "sum of 4,34", "sum of 35,63"]
Just a note here, this array is much bigger, but I cut it short just for question purposes.

Answer 1

I tried to understand your question and here is what I think you are trying to achieve.
I created a similar test and it works fine. Hope it helps you in someway.
<?php
$june = [1,1,1,1];
$july = [1,1];
$august = [1,1,1,1];
$months = array(
'June' => $june,
'July' => $july,
'August' => $august,
);
$daily = [1,1,1,1,5,5,10,10,10,10,2,2,2,2,2];
$sum_arr = array();
$i = 0;
foreach($months as $key=>$month){
$month_count = $month;
$month_sum = 0;
while($month_count > 0){
$month_sum += $daily[$i];
$i++;
$month_count--;
}
$sum_arr[$key] = $month_sum;
}
echo '<pre>';
print_r($sum_arr);
?>