Ban domains from Buddypress signup

Ban domains from Buddypress signup.php

// ====================================
// Limit signup by banning domains
function bp_as_restrict_signup_domains( $result ) {

 $banned = array(
 'spam1.com', 
 'spam2.com'
 );
 $error = 'Your email domain has been the source of spam. Please use another email address.';

 $email = $result['user_email']; 
 $domain = array_pop(explode('@', $email));
if ( in_array($domain, $banned))
 {
 $result['errors']->add('user_email', __($error, 'bp-restrict-email-domains' ) );
 };
 return $result;
}
add_filter( 'bp_core_validate_user_signup', 'bp_as_restrict_signup_domains' );