Day 2 Part 2

Day 2 Part 2.php

$rows = explode("\n", $xml);
$checksum = 0;
foreach ($rows as $row) {
    $cells = [];
    foreach (explode("|", $row) as $cell) {
         $cells[] = intval($cell);
    }
    sort($cells);
    for ($outer = 0; $outer < count($cells); $outer++) {
        for ($inner = $outer + 1; $inner < count($cells); $inner++) {
            if (($cells[$inner] % $cells[$outer]) == 0) {
                $checksum += ($cells[$inner] / $cells[$outer]);
            }
        }
    }
}
error_log("checksum: $checksum");