woocommerce_checkout_postcode_validation_notice filter-hook . WC 1.0

translators: %s: field name

Usage

add_filter( 'woocommerce_checkout_postcode_validation_notice', 'filter_function_name_6442', 10, 3 );
function filter_function_name_6442( $postcode_validation_notice, $country, $data[ $key ] ){
	// filter...

	return $postcode_validation_notice;
}

$postcode_validation_notice

-

$country

-

$data[ $key ]

-

Where the hook is called

$errors->add( $key . '_validation', apply_filters( 'woocommerce_checkout_postcode_validation_notice', $postcode_validation_notice, $country, $data[ $key ] ), array( 'id' => $key ) );

Where in WP core the hook is used WooCommerce