WordPress at a glance
filter is not described

woocommerce_cart_item_data_to_validate filter-hook . WC 1.0

Usage

add_filter( 'woocommerce_cart_item_data_to_validate', 'filter_function_name_5830', 10, 2 );
function filter_function_name_5830( $array, $product ){
	// filter...

	return $array;
}
$array
-
$product
-

Where the hook is called

wc_get_cart_item_data_hash()
woocommerce_cart_item_data_to_validate
woocommerce/includes/wc-cart-functions.php 495-502
apply_filters(
	'woocommerce_cart_item_data_to_validate',
	array(
		'type'       => $product->get_type(),
		'attributes' => 'variation' === $product->get_type() ? $product->get_variation_attributes() : '',
	),
	$product
)

Where in WP core the hook is used WooCommerce

Usage not found.