adlerka.space/lib/account.php

<?php

function isLoggedIn(){
    return $_SESSION["ID"] > 0 && !empty($_SESSION["email"]);
}

function doLogin($email, $password){
    global $mysqli;
    $found = false;
    if(!empty($email) && !empty($password)){
        $stmt = $mysqli->prepare("SELECT ID, FirstName, LastName, Nickname, PasswordHash, MinecraftNick, isAdmin FROM Users WHERE EMAIL = ? AND isActive = 1");
        $stmt->bind_param("s", $email);
        $stmt->execute();

        $idcko = 0;
        $fname = "";
        $lname = "";
        $nickname = "";
        $pwdhash = "";
        $mcnick = "";
        $stmt->bind_result($idcko, $fname, $lname, $nickname, $pwdhash, $mcnick, false);

        if($stmt->num_rows() > 0){
            $stmt->fetch();
            if (password_verify($password, $pwdhash)){
                $_SESSION["ID"] = $idcko;
                $_SESSION["first_name"] = $fname;
                $_SESSION["last_name"] = $lname;
                $_SESSION["nickname"] = $nickname;
                $_SESSION["email"] = $email;
                $_SESSION["mcnick"] = $mcnick;
                $_SESSION["isadmin"] = false;
                $found = true;
            }
        }
        $stmt->close();
    }
    return $found ? ["status" => "success"] : ["status" => "fail"];
}

function doLogout(){
    if(isLoggedIn()){
        session_destroy();
        return ["status" => "success"];
    } else {
        return ["status" => "fail"];
    }
}

function doRegister($firstname, $lastname, $nickname, $email, $password, $minecraftnick, $activationtoken){
    global $mysqli;
    $status = ["status" => "fail"];
    if (!empty($activationtoken)){
        $passwordHash = password_hash($password, PASSWORD_DEFAULT);
        $stmt = $mysqli->prepare("UPDATE Users SET FirstName = ?, LastName = ?, Nickname = ?, Email = ?, PasswordHash = ?, MinecraftNick = ?, isAdmin = 0, isActivated = 1 WHERE isActivated = 0 AND ActivationToken = ?");
        $stmt->bind_param("sssssss", $firstname, $lastname, $nickname, $email, $passwordHash, $minecraftnick, $activationtoken);
        $stmt->execute();
        if ($stmt->affected_rows > 0) {
            $status["status"] = "success";
        }
        $stmt->close();
    }
    return $status;
}