<?php
const sqlHostname = "localhost";
const sqlUsername = "root";
const sqlPassword = "";
const sqlDatabase = "quizPHP";
function connectDB() {
    $conn = new mysqli(sqlHostname, sqlUsername, sqlPassword, sqlDatabase);
    if ($conn->connect_error)
        exit("Błąd połączenia: " . $conn->connect_error);
    return $conn;
}
function jsonMsg($messsage) {
    echo json_encode(["msg" => $messsage]);
    exit();
}
function checkLogin() {
    session_start();
    if (isset($_SESSION["UID"]))
        return true;
    return false;
}
function checkLogged() {
    if (isset($_SESSION["username"]))
        return true;
    return false;
}
function redirectLogged() {
    if (!checkLogged()) {
        header("Location: /");
        exit();
    }
}