pmpro-invoice-bullets-example.php

<?php
/**
 * Display user data as a bullet on the PMPro Invoice page.
 *
 * 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_custom_invoice_bullet_top( $invoice ) {
	$user = get_userdata( $invoice->user_id );

	// First and Last name
	if ( ! empty( $user->first_name ) && ! empty( $user->last_name ) ) {
		echo '<li><strong>Name: </strong>' . esc_html( $user->first_name ) . ' ' . esc_html( $user->last_name ) . '</li>';
	}

	// Nickname
	if ( ! empty( $user->nickname ) ) {
		echo '<li><strong>Nickname: </strong>' . esc_html( $user->nickname ) . '</li>';
	}

}
add_action( 'pmpro_invoice_bullets_top', 'my_pmpro_custom_invoice_bullet_top' );

function my_pmpro_custom_invoice_bullet_bottom( $invoice ) {
	$user = get_userdata( $invoice->user_id );

	// Company Name
	if ( ! empty( $user->company_name ) ) {
		echo '<li><strong>Company: </strong>' . esc_html( $user->company_name ) . '</li>';
	}
}
add_action( 'pmpro_invoice_bullets_bottom', 'my_pmpro_custom_invoice_bullet_bottom' );