woocommerce_cart_tax_totals │ filter-hook │ WC 1.0

Usage

add_filter( 'woocommerce_cart_tax_totals', 'wp_kama_woocommerce_cart_tax_totals_filter', 10, 2 );

/**
 * Function for `woocommerce_cart_tax_totals` filter-hook.
 * 
 * @param  $tax_totals 
 * @param  $that       
 *
 * @return 
 */
function wp_kama_woocommerce_cart_tax_totals_filter( $tax_totals, $that ){

	// filter...
	return $tax_totals;
}

$tax_totals

-

$that

-

Where the hook is called

return apply_filters( 'woocommerce_cart_tax_totals', $tax_totals, $this );

Where the hook is used in WooCommerce