Top Numbers

<?php

$num = intval(readline());

$topNums = findTopNumber($num);
echo $topNums;

function findTopNumber(int $n)
{
    $result = [];
    for ($i = 1; $i <= $n; $i++) {
        $isOdd = false;
        $sum = 0;
        $numberAsString = strval($i);

        for ($k = 0; $k < strlen($numberAsString); $k++){
            $digit = intval($numberAsString[$k]);
            $sum += $digit;
            if ($digit % 2 === 1){
                $isOdd = true;
            }
        }
        if ($sum % 8 === 0 && $isOdd) {
            $result[] = $i;
        }
    }
    $result = implode(" " . PHP_EOL, $result);
    return $result;
}