- array_sum: documentation ( source)
- array_slice: documentation ( source)
<?php
$elems = [-1, 3, -4, 5, 1, -6, 2, 1];
function solution(array $A) {
// write your code in PHP5.5
$equilibriums = array();
for($i = 0, $n = sizeof($arr);$i < $n;++$i) {
if(array_sum(array_slice($arr, 0, $i)) == array_sum(array_slice($arr, $i + 1))) {
$equilibriums[] = $i;
}
}
return $equilibriums;
}