woocommerce_product_type_changed │ action-hook │ WC 1.0

Usage

add_action( 'woocommerce_product_type_changed', 'wp_kama_woocommerce_product_type_changed_action', 10, 3 );

/**
 * Function for `woocommerce_product_type_changed` action-hook.
 * 
 * @param  $product  
 * @param  $old_type 
 * @param  $new_type 
 *
 * @return void
 */
function wp_kama_woocommerce_product_type_changed_action( $product, $old_type, $new_type ){

	// action...
}

$product

-

$old_type

-

$new_type

-

Where the hook is called

do_action( 'woocommerce_product_type_changed', $product, $old_type, $new_type );

Where the hook is used in WooCommerce

add_action( 'woocommerce_product_type_changed', array( __CLASS__, 'product_type_changed' ), 10, 3 );