I need to hide a shipping method depending on if a discount code is used or not. But I don't find how to hide a shipping method in the order confirmation page. I saw that answer but it does nothing, I tried this code to verify:
add_filter( 'woocommerce_package_rates', 'custom_shipping_rates', 100, 2 );
function custom_shipping_rates( $rates, $package ) {
exit();
}
Which should block page display but the page is well loaded.
EDIT: The filter is never called because wordpress uses stored rates in class-wc-shipping.php:
if ( ! is_array( $stored_rates ) || $package_hash !== $stored_rates['package_hash'] || 'yes' === get_option( 'woocommerce_shipping_debug_mode', 'no' ) )
{
...
// Filter the calculated rates.
$package['rates'] = apply_filters( 'woocommerce_package_rates',
$package['rates'], $package );
...
}
else
{
$package['rates'] = $stored_rates['rates'];
}