Makes All billing Address Fields Not Required At checkout.

unset-billing-address-fields.php

<?php // do not copy this line

/**
 * This recipe makes all billing fields on the checkout page not required
 *
 * Note: Make sure your Gateway doesn't require these 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 my_pmpro_not_required_billing_fields( $fields ) {
	if ( is_array( $fields ) ) {
		unset( $fields['bfirstname'] );
		unset( $fields['blastname'] );
		unset( $fields['baddress1'] );
		unset( $fields['baddress2'] );
		unset( $fields['bcity'] );
		unset( $fields['bstate'] );
		unset( $fields['bzipcode'] );
		unset( $fields['bcountry'] );
		unset( $fields['bphone'] );
	}
	return $fields;
}
//run it later in the queue if necessary if other plugins or code sets fields required, e.g. change 50 to a higher number.
add_action( 'pmpro_required_billing_fields', 'my_pmpro_not_required_billing_fields', 50, 1 );