woocommerce_product_duplicate │ action-hook │ WC 1.0

Usage

add_action( 'woocommerce_product_duplicate', 'wp_kama_woocommerce_product_duplicate_action', 10, 2 );

/**
 * Function for `woocommerce_product_duplicate` action-hook.
 * 
 * @param  $duplicate 
 * @param  $product   
 *
 * @return void
 */
function wp_kama_woocommerce_product_duplicate_action( $duplicate, $product ){

	// action...
}

$duplicate

-

$product

-

Where the hook is called

do_action( 'woocommerce_product_duplicate', $duplicate, $product );

Where the hook is used in WooCommerce