How to validate in micro phalcon

you can validate each request after you received it in controller action.

maybe my code can help you.

    $name = $this->request->getPost("name");
    $email = $this->request->getPost("email");
    $password = $this->request->getPost("password");
    $validation = new Validation();
    $validation->add(
        'name',
        new PresenceOf(
            [
                'message' => 'The name is required',
            ]
        )
    );
    $validation->add(
        'email',
        new Email(
            [
                'message' => 'Email not valid',
            ]
        )
    );
    $validation->add(
        'password',
        new PresenceOf(
            [
                'message' => 'The password is required',
            ]
        )
    );
    $arr = array(
        "name"=>$name,
        "email"=>$email,
        "password"=>$password
    );
    $messages = $validation->validate($arr);
    if (count($messages)) {
        foreach ($messages as $message) {
            echo $message, '<br>';
    }

Also i would suggest putting this code into separated class.