WordPress at a glance
filter is not described

woocommerce_matched_rates filter-hook . WC 1.0

Usage

add_filter( 'woocommerce_matched_rates', 'filter_function_name_5551', 10, 3 );
function filter_function_name_5551( $matched_tax_rates, $tax_class, $customer ){
	// filter...

	return $matched_tax_rates;
}
$matched_tax_rates
-
$tax_class
-
$customer
-

Where the hook is called

WC_Tax::get_rates_from_location()
woocommerce_matched_rates
woocommerce/includes/class-wc-tax.php 514
return apply_filters( 'woocommerce_matched_rates', $matched_tax_rates, $tax_class, $customer );

Where in WP core the hook is used WooCommerce

Usage not found.