<?php
require 'resource/libs/db/db.php';

$data = $_POST;
if(isset($data['do-signup']))
{
    $errors = array();
    if(trim($data['login']) == '')
    {
        $errors[]='Введите логин';
    }
    if(trim($data['email']) == '')
    {
        $errors[]='Введите email';
    }
    if($data['password'] == '')
    {
        $errors[]='Введите pasw';
    }
    if(R::count('users',"login = ?", array($data['login'])) > 0 )
    {
            $errors[] = 'login уже есть';
    }
    if(R::count('users',"email = ?", array($data['email'])) > 0 )
    {
            $errors[] = 'email уже есть';
    }

    if(empty($errors))
    {
            $user = R::dispense('users');
            $user->login = $data['login'];
            $user->email = $data['email'];
            $user->password = password_hash($data['password'],PASSWORD_DEFAULT);
            R::store($user);
    }else
    {
        echo '<div>'.array_shift($errors).'</div><hr>';

    }
}?>

<form action="signup.php" method="POST">
            <ul>
            <li><input type="text" name="login" placeholder="Логин"></li>
            <li><input type="email" name="email" placeholder="Email"></li>
            <li><input type="text" name="password" placeholder="Пароль"></li>
            <li><input type="submit" name="do-signup" value="Вход"></li>
        </ul>
        </form>

<input type="hidden" name="token" value="<?php echo(rand(1,999999));?>" />

session_start();
if (isset($_POST['token'])) {
    if ($_POST['token'] == $_SESSION['formToken']) {
        // ошибка: повторная отправка формы
    } else {
        $_SESSION['formToken'] = $_POST['token'];
        // обрабатываем форму
    }
}

header("Location:".$_SERVER['PHP_SELF']);