woocommerce_shipping_(method_id)_instance_settings_values filter-hook . WC 1.0

Usage

add_filter( 'woocommerce_shipping_(method_id)_instance_settings_values', 'filter_function_name_3367', 10, 2 );
function filter_function_name_3367( $instance_settings, $method ){
	// filter...

	return $instance_settings;
}

$instance_settings

-

$method

-

Where the hook is called

update_option( $method->get_instance_option_key(), apply_filters( 'woocommerce_shipping_' . $method->id . '_instance_settings_values', $instance_settings, $method ) );

Where in WP core the hook is used WooCommerce