Add billing address at checkout PaidMemberships Pro

gistfile1.txt

<?php
/**
 * This recipe will add billing fields to the checkout. Useful for payment gateways
 * that don't have the option to display billing fields. 
 * 
 * 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 mypmpromm_add_address_fields() {
	// Require PMPro and PMPro Register Helper
	if ( ! defined( 'PMPRO_VERSION' ) || ! defined( 'PMPRORH_VERSION' ) ) {
		return;
	}

	// List the fields you want to include
	$address_fields = array(
		'pmpro_baddress1' => 'Address 1',
		'pmpro_baddress2' => 'Address 2',
		'pmpro_bcity' => 'City',
		'pmpro_bstate' => 'State',
		'pmpro_bzipcode' => 'Zipcode',
	);

	// Define the fields
	$fields = array();
	foreach ( $address_fields as $name => $label ) {
		$fields[] = new PMProRH_Field(
			$name,
			'text',
			array(
				'label' => $label,
				'size' => 40,
				'addmember' => true,
			)
		);
	}

	// Add new checkout box with label
	pmprorh_add_checkout_box( 'billing_mailing_address', 'Billing/Mailing Address' );

	// Add fields into a new checkout_boxes area of checkout page
	foreach ( $fields as $field ) {
		pmprorh_add_registration_field(
			'billing_mailing_address', // location on checkout page
			$field            // PMProRH_Field object
		);
	}
}
add_action( 'init', 'mypmpromm_add_address_fields' );