woocommerce_calc_shipping_tax │ filter-hook │ WC 1.0

Usage

add_filter( 'woocommerce_calc_shipping_tax', 'wp_kama_woocommerce_calc_shipping_tax_filter', 10, 3 );

/**
 * Function for `woocommerce_calc_shipping_tax` filter-hook.
 * 
 * @param  $taxes 
 * @param  $price 
 * @param  $rates 
 *
 * @return 
 */
function wp_kama_woocommerce_calc_shipping_tax_filter( $taxes, $price, $rates ){

	// filter...
	return $taxes;
}

$taxes

-

$price

-

$rates

-

Where the hook is called

return apply_filters( 'woocommerce_calc_shipping_tax', $taxes, $price, $rates );

Where the hook is used in WooCommerce