確率からn/65536のnを求める

percent.php

<?php

declare(strict_types=1);

function get(string $per, ?int $keta = null)
{
    if ($keta === null) {
        preg_match('/\.[0-9]+/', $per, $matches);
        $m = $matches[0];
        $keta = strlen($m) - 1;
    }
    echo "Check for $per, Keta $keta" . PHP_EOL;
    $hits = 0;
    for ($i = 1; $i <= 65536; $i++) {
        $h = strval(65536 / $i);
        if ($h === $per || strpos($h, $per) === 0) {
            echo "Hit: $i, Per: $per, H: $h, P: " . (65536 / $i) . ", G: " . round(65536 / $i, $keta) . PHP_EOL;
            $hits++;
        }
    }
    if ($hits <= 0) {
        echo "NO HIT" . PHP_EOL;
    }
}

get("6.180");