huita.php

<?php

$huita = $_POST["huita"];
$db= new PDO("mysql:host=localhost;dbname=huitadb", "pidorname", "pidorpass");

$st = $db->prepare("INSERT INTO huita_table ( huita_result ) values ( ? )");

$st->bindParam(1, $huita);
$st->execute();


huita.js

function saveResult(huitaResult)
{
    var req = XMLHttpRequest();
    req.open('POST', '/hui/calculator/huita.php', true);
    req.send("huita=" ++ huitaResult);
}