WooCommerce - Add a surcharge based on the delivery country (exclude France)

functions.php

<?php
/**
 * Add a 1% surcharge to your cart / checkout based on delivery country
 * Taxes, shipping costs and order subtotal are all included in the surcharge amount
 */
add_action( 'woocommerce_cart_calculate_fees','	woocommerce_custom_surcharge' );
function woocommerce_custom_surcharge() {
  global $woocommerce;
 
	if ( is_admin() && ! defined( 'DOING_AJAX' ) )
		return;

 	$county 	= array('FR');
	$percentage 	= 0.01;

	if ( !in_array( $woocommerce->customer->get_shipping_country(), $county ) ) :
		$surcharge = ( $woocommerce->cart->cart_contents_total + $woocommerce->cart->shipping_total ) * $percentage;
		$woocommerce->cart->add_fee( 'Surcharge', $surcharge, true, '' );
	endif;
 
}

Pour les pourcentages et exclure la France, j'ai réalisé le code suivant :

//Ajouter un supplément à votre paiement en fonction du pays de livraison exclu france
add_action( 'woocommerce_cart_calculate_fees','woocommerce_custom_surcharge' ); 
function woocommerce_custom_surcharge() { 
    global $woocommerce; 

    if ( is_admin() && !defined( 'DOING_AJAX' ) ) return;

    $county = ['FR']; //france
    // change the $fee to set the surcharge to a value to suit
	
	$percentage = 0.025;
	if ( !in_array( WC()->customer->get_shipping_country(), $county ) ){
		$surcharge = ( $woocommerce->cart->cart_contents_total + $woocommerce->cart->shipping_total ) * $percentage;	
		$woocommerce->cart->add_fee( 'Frais de transaction', $surcharge, true, '' );
	}
}

Changer "0,025" par le pourcentage que vous voulez !