Add Paid Memberships Pro Billing Address as required fields to Edit Profile, User Profile Edit (admin), and Add Member from Admin pages. #pmpro-register-helper

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

<? php
/**
 * This will add billing fields to Add Member from Admin and the user profile edit pages.
 *
 * Optional: Set if fields should be required
 *
 * Requires Paid Memberships Pro and PMPro Register Helper plugins active.
 *
 * You can add this recipe to your site by creating a custom plugin
 * or using the Code Snippets plugin available for free in the WordPress repository.
 * Read this companion article for step-by-step directions on either method.
 * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */
function add_pmpro_billing_fields_to_edit_profile_and_add_member() {

	#-- SETTINGS ---#

	/* Should the fields be required? */

	$required = true; // (Boolean) true: fields are required | false: fields are optional.

	#-- END SETTINGS ---#

	/* That's it, no further editing required */

	// Require PMPro and PMPro Register Helper
	if ( ! defined( 'PMPRO_VERSION' ) || ! defined( 'PMPRORH_VERSION' ) ) {
		return;
	}

	// Get countries.
	global $pmpro_countries;

	// Create an array for the fields.
	$fields = array();

	// Define the fields

	// Add a Billing Address title for Add Member from Admin page.
	if ( is_admin() && isset( $_REQUEST['page'] ) && 'pmpro-addmember' == $_REQUEST['page'] ) {
		$fields[] = new PMProRH_Field(
			'addmember_billing_title',
			'html',
			array(
				'label'     => '<strong>Billing Address</strong>',
				'profile'   => 'only_admin',
				'addmember' => true,
			)
		);
	}

	// List the fields you want to include.
	$address_fields = array(
		'pmpro_bfirstname' => 'First Name',
		'pmpro_blastname'  => 'Last Name',
		'pmpro_baddress1'  => 'Address 1',
		'pmpro_baddress2'  => 'Address 2',
		'pmpro_bcity'      => 'City',
		'pmpro_bstate'     => 'State',
		'pmpro_bzipcode'   => 'Zipcode',
		'pmpro_bcountry'   => 'Country',
		'pmpro_bphone'     => 'Phone',
	);

	// Build the fields.
	foreach ( $address_fields as $name => $label ) {

		// Set field options for country field.
		$options = 'pmpro_bcountry' === $name ? $pmpro_countries : array();
		$type    = 'pmpro_bcountry' === $name ? 'select' : 'text';

		// Should the field be required?
		$required_option = 'pmpro_baddress2' !== $name ? $required : false; // Address 2 is always optional.

		// Add HTML required attribute to check field before submit.
		$required_html = $required_option ? array( 'required' => 'required' ) : array();

		$fields[] = new PMProRH_Field(
			$name,
			$type,
			array(
				'label'           => $label,
				'size'            => 40,
				'profile'         => 'only',
				'options'         => $options,
				'addmember'       => true,
				'required'        => $required_option,
				'html_attributes' => $required_html,
			)
		);
	}

	// Add new checkout box with label.
	pmprorh_add_checkout_box( 'billing_address_profile', 'Billing Address' );

	// Add fields into the custom checkout boxes area created.
	foreach ( $fields as $field ) {
		pmprorh_add_registration_field(
			'billing_address_profile', // location on checkout page
			$field            // PMProRH_Field object
		);
	}
}
add_action( 'init', 'add_pmpro_billing_fields_to_edit_profile_and_add_member' );

To add billing address with User Fields: https://gist.github.com/ipokkel/47a8de3553e84bfe08d079d2952c8486