<?php
session_start();
if (!isset($_SESSION['loggedin'])) {
    exit("unauthorized");
}

include "../database.php";

$id = $_POST["id"];

$sql = "UPDATE attendance SET status = 'Chiuso', closed = 1 WHERE id = $id";
if ($con->query($sql) === true) {
    echo "ok";
} else {
    echo "error";
}

$con->close();