woocommerce_matched_rates │ filter-hook │ WC 1.0

Usage

add_filter( 'woocommerce_matched_rates', 'wp_kama_woocommerce_matched_rates_filter', 10, 3 );

/**
 * Function for `woocommerce_matched_rates` filter-hook.
 * 
 * @param  $matched_tax_rates 
 * @param  $tax_class         
 * @param  $customer          
 *
 * @return 
 */
function wp_kama_woocommerce_matched_rates_filter( $matched_tax_rates, $tax_class, $customer ){

	// filter...
	return $matched_tax_rates;
}

$matched_tax_rates

-

$tax_class

-

$customer

-

Where the hook is called

return apply_filters( 'woocommerce_matched_rates', $matched_tax_rates, $tax_class, $customer );

Where the hook is used in WooCommerce