<?php
$input_list = [1,10,7,9,2];
$sum = 11;
function sum_array($input_array, $total) {
$i = 0;
$array_length = count($input_array) - 1;
foreach($input_array as $input) {
if ($i < $array_length) {
for ($j = $i + 1; $j <= $array_length; $j++ ) {
if($total == $input_array[$i] + $input_array[$j]) {
echo 'Indices: [' . $i . '][' . $j . ']' . '<br>';
}
}
}
$i++;
}
}
sum_array($input_list,$sum);