A WordPress plugin that changes the user role to "University Customer" if a user registers with a .edu email address.

university-customer-role-assignment.php

<?php

/**
 * University Customer Role Assignment
 *
 * @package           UniversityCustomerRoleAssignment
 * @author            Micah Wood
 * @copyright         Copyright 2023 by Micah Wood - All rights reserved.
 * @license           GPL2.0-or-later
 *
 * @wordpress-plugin
 * Plugin Name:       University Customer Role Assignment
 * Plugin URI:	      https://gist.github.com/wpscholar/780c28ca13b1fec8986840cf39d9e531
 * Description:       Changes the user role to "University Customer" if they register with a .edu email address.
 * Version:           1.0
 * Requires PHP:      7.4
 * Requires at least: 5.8
 * Author:            Micah Wood
 * Author URI:        https://wpscholar.com
 * License:           GPL V2 or later
 * License URI:       https://www.gnu.org/licenses/gpl-2.0.html
 */

add_action(
	'woocommerce_created_customer',
	function ( $customer_id ) {
		$user   = get_user_by( 'id', $customer_id );
		$domain = substr( strrchr( $user->user_email, '@' ), 1 );
		$isEdu  = strrpos( $domain, '.edu' ) == strlen( $domain ) - strlen( '.edu' );
		if ( $isEdu ) {
			$user->add_role( 'university-customer' );
			$user->remove_role( 'customer' );
		}
	}
);