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@ 2018-06-19T08:58:55Z

<?php

function sum(array $ints): int
{
    array_walk($ints, function(int $int) {});
    $a = 0;
    foreach ($ints as $int) {
        $a += $int;
    }
    return $a;
}

var_dump(sum([1, 2, 3]));
var_dump(sum([1, 2, "three"]));

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
array_walk: documentation ( source)

preferences:dark modelive preview

35.83 ms | 402 KiB | 5 Q