- array_sum: documentation ( source)
- array_count_values: documentation ( source)
- array_search: documentation ( source)
- var_export: documentation ( source)
<?php
$array = ['+5', '+5', '+3', '+3', '+3', '+3', '+5', '+5'];
foreach (array_count_values($array) as $value => $count) {
if ($count > 1) {
unset($array[array_search($value, $array)]);
}
}
var_export(array_sum($array));