WordPress at a glance
filter is not described

woocommerce_cart_product_subtotal filter-hook . WC 1.0

Usage

add_filter( 'woocommerce_cart_product_subtotal', 'filter_function_name_4142', 10, 4 );
function filter_function_name_4142( $product_subtotal, $product, $quantity, $that ){
	// filter...

	return $product_subtotal;
}
$product_subtotal
-
$product
-
$quantity
-
$that
-

Where the hook is called

WC_Cart::get_product_subtotal()
woocommerce_cart_product_subtotal
woocommerce/includes/class-wc-cart.php 2007
return apply_filters( 'woocommerce_cart_product_subtotal', $product_subtotal, $product, $quantity, $this );

Where in WP core the hook is used WooCommerce

Usage not found.