Email validation for customer registration

Hi,

I have created a site in Opencart, but want to add some validation with the E-mail address when a customer registers as a user.

Can anyone please tell me what the correct is that I should look at?

Is it in: controller -> account -> register.php

and then this code:

if ((utf8_strlen($this->request->post['email']) > 96) || !preg_match('/^[^\@]+@.*\.[a-z]{2,6}$/i', $this->request->post['email'])) {
$this->error['email'] = $this->language->get('error_email');

Or is it somewhere else?

I hope someone can help.

Thank you