How to restrict users from Registering public email addresses other than company email address in RS Forms Joomla

Question

I have used RS form form for user Registration on my joomla site. There i want to make registration from only company email address for internal users. How can i do this ? Please advice. Is there any way of configure custom email domain for RS Form email validation field?

Answer 1

You can use a Regular Expression as field validation (instead of email).

1. While on the RS Form, edit the field and go to Validations.
2. Change the Validation Rule to Regex.
3. Set the Regex Syntax to /^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@yourdomain.com$/

Note: be sure to change "yourdomain.com" to your own domain.

Validating emails using regular expressions is not perfect. See Using a regular expression to validate an email address. The first part of the regex I suggested here is taken from w3.

Answer 2

If you need a workaround and hardcode it, you can try the following approach in code:

// Domain to check
$email_domain = "@mydomain.com";
// Email to check
$co_email = "joefoobar@mydomain.com"; // returns true => valid
//$co_email = "joefoobar@gmail.com"; // returns false => invalid (uncomment to test)
if(!substr_count($co_email, $email_domain) > 0){
    // Set the error
    echo "Invalid!";
} else {
    // No error, proceed with code
    echo "Valid!";
}