WordPress at a glance
filter is not described

woocommerce_countries_shipping_to_prefix filter-hook . WC 1.0

Usage

add_filter( 'woocommerce_countries_shipping_to_prefix', 'filter_function_name_3170', 10, 2 );
function filter_function_name_3170( $return, $country_code ){
	// filter...

	return $return;
}
$return
-
$country_code
-

Where the hook is called

WC_Countries::shipping_to_prefix()
woocommerce_countries_shipping_to_prefix
woocommerce/includes/class-wc-countries.php 415
return apply_filters( 'woocommerce_countries_shipping_to_prefix', $return, $country_code );

Where in WP core the hook is used WooCommerce

Usage not found.