WPML Compatibility for Paid Memberships Pro Checkout.

pmpro-checkout-compatibility-wpml.php

<?php
/**
 * Adds support for plugins like WPML that create pages for translation.
 * Improves the pmpro_is_checkout() calls to try and make it 'smarter'.
 * Add this code to your site by following this guide - https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */

function my_pmpro_wpml_checkout_compat( $is_checkout ) {
	
  // If we're already on checkout, just bail.
	if ( $is_checkout ) {
		return $is_checkout;
	}

	$level = pmpro_getLevelAtCheckout();

	if ( isset( $level->id ) ) {
		$is_checkout = true;
	}
	
	return $is_checkout;
}
add_filter( 'pmpro_is_checkout', 'my_pmpro_wpml_checkout_compat', 20, 1 );

This is built into core now and is no longer needed.