register_helper_country_state.php

<?php

// REGISTER HELPER
function my_pmprorh_init()
{
//don't break if Register Helper is not loaded
	if(!function_exists( 'pmprorh_add_registration_field' )) {
		return false;
	}

global $pmpro_countries;

$countries = array_merge(array("" => "Choose One"), $pmpro_countries);

	//define the fields
    $fields = array();

    $fields[] = new PMProRH_Field(
    	"bcountry",
    	"select",
    	array(
		"label"=>"Country",
		"required" => true,
		"profile" => true,		// show in user profile
		"options"=> $countries
		));

    $fields[] = new PMProRH_Field(
        "county_state",
        "text",
        array(
		"label"=>"County/State",
		"profile"	=> true,	// show in user profile
		"required" => true
        ));

	//add the fields into a new checkout_boxes are of the checkout page
	foreach($fields as $field)
		pmprorh_add_registration_field(
			'checkout_boxes',		// location on checkout page
			$field		// PMProRH_Field object
		);
	//that's it. see the PMPro Register Helper readme for more information and examples.
}
add_action( 'init', 'my_pmprorh_init' );