if($_POST['function']=="register") {

    $username = htmlspecialchars($_POST['username']);
    $username = $conn->real_escape_string($username);
    $pass = htmlspecialchars($_POST['password']);
    $pass = $conn->real_escape_string($pass);
    $pass2 = htmlspecialchars($_POST['password2']);
    $pass2 = $conn->real_escape_string($pass2);
    $email = htmlspecialchars($_POST['email']);
    $email = $conn->real_escape_string($email);
    $veznev = htmlspecialchars($_POST['veznev']);
    $veznev = $conn->real_escape_string($veznev);
    $kernev = htmlspecialchars($_POST['kernev']);
    $kernev = $conn->real_escape_string($kernev);


    $uresult = $conn->query("SELECT * FROM users WHERE username='".$username."'");
    $eresult = $conn->query("SELECT * FROM users WHERE email='".$email."'");

    $ip = $conn->query("SELECT * FROM users WHERE regip='".$_SERVER['REMOTE_ADDR']."'");
        if($ip->num_rows == 0) {
            if($uresult->num_rows == 0) {
                if($eresult->num_rows == 0) {
                    if($pass==$pass2) {
                        $securedpass = hash("SHA256", $pass2);
                        $ipaddr = $_SERVER['REMOTE_ADDR'];
                        $conn->query("INSERT INTO users (username, password, email, ip, regip, regdate, veznev, kernev)
        VALUES ('$username', '$securedpass', '$email', '$ipaddr', '$ipaddr', '$date', '$veznev', '$kernev' );");
                        $a = array('msg' => 'Sikeres regisztráció!', 'success' => 'true');
                        echo json_encode($a);
                    }else {
                        $a = array('msg' => 'A két jelszó nem egyezik!');
                        echo json_encode($a);
                    }
                } else {
                    $a = array('msg' => 'Az e-mail cím már használatban van!');
                    echo json_encode($a);
                }
            } else {
                $a = array('msg' => 'A felhasználónév már használatban van!');
                echo json_encode($a);
            }
        } else {
            $a = array('msg' => 'Ezzel az ip címmel már regisztráltak!');
            echo json_encode($a);
        }
}
?>