woocommerce_cart_subtotal filter-hook . WC 1.0

Usage

add_filter( 'woocommerce_cart_subtotal', 'filter_function_name_2393', 10, 3 );
function filter_function_name_2393( $cart_subtotal, $compound, $that ){
	// filter...

	return $cart_subtotal;
}

$cart_subtotal

-

$compound

-

$that

-

Where the hook is called

return apply_filters( 'woocommerce_cart_subtotal', $cart_subtotal, $compound, $this );

Where in WP core the hook is used WooCommerce