woocommerce_product_parent │ filter-hook │ WC 1.0

Usage

add_filter( 'woocommerce_product_parent', 'wp_kama_woocommerce_product_parent_filter', 10, 2 );

/**
 * Function for `woocommerce_product_parent` filter-hook.
 * 
 * @param  $absint 
 * @param  $that   
 *
 * @return 
 */
function wp_kama_woocommerce_product_parent_filter( $absint, $that ){

	// filter...
	return $absint;
}

$absint

-

$that

-

Where the hook is called

return apply_filters( 'woocommerce_product_parent', absint( $this->get_post_data()->post_parent ), $this );

Where the hook is used in WooCommerce