WordPress at Your Fingertips
filter is not described

woocommerce_add_to_cart_handler filter-hook . WC 1.0

Usage

add_filter( 'woocommerce_add_to_cart_handler', 'filter_function_name_5403', 10, 2 );
function filter_function_name_5403( $adding_to_cart_type, $adding_to_cart ){
	// filter...

	return $adding_to_cart_type;
}
$adding_to_cart_type
-
$adding_to_cart
-

Where the hook is called

WC_Form_Handler::add_to_cart_action()
woocommerce_add_to_cart_handler
woocommerce/includes/class-wc-form-handler.php 787
$add_to_cart_handler = apply_filters( 'woocommerce_add_to_cart_handler', $adding_to_cart->get_type(), $adding_to_cart );

Where in WP core the hook is used WooCommerce

Usage not found.