WordPress at Your Fingertips
filter is not described

woocommerce_cart_discounts_before_tax filter-hook . WC 1.0

Usage

add_filter( 'woocommerce_cart_discounts_before_tax', 'filter_function_name_3999', 10, 2 );
function filter_function_name_3999( $discounts_before_tax, $that ){
	// filter...

	return $discounts_before_tax;
}
$discounts_before_tax
-
$that
-

Where the hook is called

WC_Legacy_Cart::get_discounts_before_tax()
woocommerce_cart_discounts_before_tax
woocommerce/includes/legacy/class-wc-legacy-cart.php 401
return apply_filters( 'woocommerce_cart_discounts_before_tax', $discounts_before_tax, $this );

Where in WP core the hook is used WooCommerce

Usage not found.