php sum values from array with maximum value

I wanted to get the sum of values and limit them with a maximum value. My maximum value is 500.

My array:

array:11 [
  0 => 100
  1 => 100
  2 => 100
  3 => 100
  4 => 100
  5 => 100
  6 => 300
  7 => 300
  8 => 300
  9 => 300
  10 => 300
  11 => 300
  12 => 300
  13 => 300
  14 => 300
  15 => 300
]
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So each 100 will be sum up to 500 and end up getting this array below.

Desired output:

array:11 [
  0 => 300
  1 => 300
  2 => 300
  3 => 300
  4 => 300
  5 => 300
  6 => 300
  7 => 500
  8 => 500
  9 => 500
]
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This is what I did so far. Tried to sort all numbers from lowest to highest usingusort.

usort($orderSumArr, function ($a, $b) {
   return $a > $b;
});

$sumArr = [];
$current = 0;
foreach ($sumArr as $num) {
   if ($current + $num <= 500) { // limit up to 500
       $current += $num;
   } else {
       $sumArr[] = $current;
       $current = $num;
   }
}

$sumArr[] = $currentSum2;
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And this is the output I'm getting. It ends up adding the first 100 which produce 500 and the remaining 100 was added to 300 which sum up to 400.

array:11 [
  0 => 300
  1 => 300
  2 => 300
  3 => 300
  4 => 300
  5 => 300
  6 => 300
  7 => 300
  8 => 300
  9 => 400
  10 => 500
]
Copy code

Thanks in advance!!

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