WordPress at a glance
filter is not described

woocommerce_coupon_is_valid_for_cart filter-hook . WC 1.0

Check if a coupon is valid.

Usage

add_filter( 'woocommerce_coupon_is_valid_for_cart', 'filter_function_name_4158', 10, 2 );
function filter_function_name_4158( $is_type, $that ){
	// filter...

	return $is_type;
}
$is_type
-
$that
-

Where the hook is called

WC_Coupon::is_valid_for_cart()
woocommerce_coupon_is_valid_for_cart
woocommerce/includes/class-wc-coupon.php 859
return apply_filters( 'woocommerce_coupon_is_valid_for_cart', $this->is_type( wc_get_cart_coupon_types() ), $this );

Where in WP core the hook is used WooCommerce

Usage not found.