Question

I have this result:

Array ( [0] => 0, [1] => 2 ) 
Array ( [0] => 3, [1] => 3 ) 
Array ( [0] => 0, [1] => 1 ) 
Array ( [0] => 3, [1] => 1 ) 
Array ( [0] => 3, [1] => 3 ) 

and it comes from here:

 $total = array(); $i=0; $count = 0;
  foreach($dates as $d){
       $total[$i] = count($value[$d]);
       $i++;
  }
print_r ($total); echo '<br>';

What I want to do is add $total[0] like 0+3+0+3+3 = 9 and add $total[1] like 2+3+1+1+3 = 10.

I only want back the 9 and the 10

Any ideas?

Thanks

Answer 1

If I am correctly understanding the question, you have no need for additional arrays inside the loop. You simply need to accumulate each array value into a different variable:

$total_1 = 0;
$total_2 = 0;
foreach ($array as $a) {
  $total_1 += $a[0];
  $total_2 += $a[1];
}

echo "Total1: $total_1, Total2: $total_2";

If you have an unknown number of elements, use an array to sum them up by their keys. You need an internal iterator as well. This is, incidentally a pretty common job interview question in my experience.

// Array to hold all the sums
$sums = array();
foreach ($array as $a) {
  // internal iteration
  foreach ($a as $key=>$val) {
    // Add to the key if it already exists, otherwise initialize it to the current value.
    $sums[$key] = isset($sums[$key]) ? $sums[$key] += $val : $val;
  }
}

// Output your results:

foreach ($sums as $key=>$s) {
  echo "Sum of $key is $s\n";
}