WordPress at a glance
filter is not described

woocommerce_european_union_countries filter-hook . WC 1.0

Usage

add_filter( 'woocommerce_european_union_countries', 'filter_function_name_376', 10, 2 );
function filter_function_name_376( $countries, $type ){
	// filter...

	return $countries;
}
$countries
-
$type
-

Where the hook is called

WC_Countries::get_european_union_countries()
woocommerce_european_union_countries
woocommerce/includes/class-wc-countries.php 374
return apply_filters( 'woocommerce_european_union_countries', $countries, $type );

Where in WP core the hook is used WooCommerce

Usage not found.