Add billing fields to Add Member Settings

add-billing-to-add-member-and-profile.php

<?php
/*
 * Add this code below to your PMPro Customizations Plugin - https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 * This will add billing fields to Add Member and the user's profile page.
 */
function add_billing_fields_to_add_member_profile() {

	//check for register helper
	if(!function_exists("pmprorh_add_registration_field"))
		return;
	
	//define the fields
	$fields = array();
	$fields[] = new PMProRH_Field("pmpro_baddress1", "text", array("label"=>"Billing Address 1", "size"=>40, "profile"=>true, "required"=>false, "addmember" => true));
	$fields[] = new PMProRH_Field("pmpro_baddress2", "text", array("label"=>"Billing Address 2", "size"=>40, "profile"=>true, "required"=>false, "addmember" => true));
	$fields[] = new PMProRH_Field("pmpro_bcity", "text", array("label"=>"Billing City", "size"=>40, "profile"=>true, "required"=>false, "addmember" => true));
	$fields[] = new PMProRH_Field("pmpro_bstate", "text", array("label"=>"Billing State", "size"=>10, "profile"=>true, "required"=>false, "addmember" => true));
	$fields[] = new PMProRH_Field("pmpro_bzipcode", "text", array("label"=>"Billing Postal Code", "size"=>10, "profile"=>true, "required"=>false, "addmember" => true));
	$fields[] = new PMProRH_Field("pmpro_bcountry", "text", array("label"=>"Billing Country", "profile"=>true, "required"=>false, "addmember" => true));
	$fields[] = new PMProRH_Field("pmpro_bphone", "text", array("label"=>"Billing Phone", "size"=>40, "profile"=>true, "required"=>false, "addmember" => true));	
	
	//add the fields into a new checkout_boxes are of the checkout page
	foreach($fields as $field)
		pmprorh_add_registration_field("profile", $field);
}
add_action("init", "add_billing_fields_to_add_member_profile");

To show the country as a dropdown, use this modified version - https://gist.github.com/gausam/04e4b02eb239bd94e68a4718de2c85dc.

To include billing First and last names - https://gist.github.com/ipokkel/08cc6d914947ca2d37d86acb4f599c79