<?php
session_start();
if (!isset($_SESSION['loggedin'])) {
    exit("unauthorized");
}

include "../database.php";

$id = $_POST["id"];

$sql = "DELETE FROM attendance_rows WHERE attendance_id = $id";
if ($con->query($sql) === true) {
    $sql = "DELETE FROM attendance_users WHERE attendance_id = $id";
    if ($con->query($sql) === true) {
        $sql = "DELETE FROM attendance WHERE id = $id";
        if ($con->query($sql) === true) {
            echo "ok";
        } else {
            echo "error";
        }
    } else {
        echo "error";
    }
} else {
    echo "error";
}

$con->close();