Post IPN data to multiple URLs example [Paid Memberships Pro]

pmpro-ipn-redirect.php

<?php
/**
 * Needs testing
 * Forward PayPal IPN from WooCommerce to PMPro's IPN handler.
 * Drop this into a custom plugin or your theme's functions.php.
 */

function my_pmpro_forward_ipn_from_woo() {

    // Forward the raw POST data from Woo's IPN to PMPro.
    $response = wp_remote_post(
        admin_url('admin-ajax.php?action=ipnhandler'),
        array(
            'body'      => wp_unslash($_POST),
            'timeout'   => 15,
            'sslverify' => false,
        )
    );

    // Optionally log response for debugging
    if ( is_wp_error( $response ) ) {
        error_log( 'PMPro IPN Forwarding Failed: ' . $response->get_error_message() );
    } else {
        error_log( 'PMPro IPN Forwarded Successfully: ' . wp_remote_retrieve_body( $response ) );
    }
}
add_action( 'woocommerce_api_wc_gateway_paypal', 'my_pmpro_forward_ipn_from_woo' );