battles/classes/Register.php

<?php

//namespace /;

use Battles\Database\Db;

class Register
{
    public static function addUser(string $login, string $password, string $email, string $birthday): int
    {
        $password = password_hash($password, PASSWORD_DEFAULT);
        $email = filter_var($email, FILTER_VALIDATE_EMAIL);

        if (
            !$email ||
            Db::getInstance()->execute('select count(*) from users where login = ? or email = ?', [$login, $email])->fetchColumn()
        ) {
            return 0;
        }
        Db::getInstance()->execute('insert into users (login,pass,email,borndate,ip,session_id,shadow) values (?,?,?,?,?,?,?)',
            [$login, $password, $email, $birthday, $_SERVER['REMOTE_ADDR'], session_id(), '0.png']);
        $userId = Db::getInstance()->lastInsertId();
        Db::getInstance()->execute('insert into online (user_id, login_time, room, real_time) values (?,?,1,?)', [$userId, time(), time()]);
        Db::getInstance()->execute('insert into bank (user_id) values ?', $userId);
        return $userId;
    }
}