woocommerce_countries_using_vat │ filter-hook │ WC 1.0

Usage

add_filter( 'woocommerce_countries_using_vat', 'wp_kama_woocommerce_countries_using_vat_filter' );

/**
 * Function for `woocommerce_countries_using_vat` filter-hook.
 * 
 * @param  $countries 
 *
 * @return 
 */
function wp_kama_woocommerce_countries_using_vat_filter( $countries ){

	// filter...
	return $countries;
}

$countries

-

Where the hook is called

return apply_filters( 'woocommerce_countries_using_vat', $countries );

Where the hook is used in WooCommerce