WordPress at a glance
filter is not described

woocommerce_file_download_filename filter-hook . WC 1.0

Usage

add_filter( 'woocommerce_file_download_filename', 'filter_function_name_2710', 10, 2 );
function filter_function_name_2710( $filename, $product_id ){
	// filter...

	return $filename;
}
$filename
-
$product_id
-

Where the hook is called

WC_Download_Handler::download()
woocommerce_file_download_filename
Controller::prepare_item_for_response()
woocommerce/includes/class-wc-download-handler.php 218
$filename = apply_filters( 'woocommerce_file_download_filename', $filename, $product_id );
woocommerce/packages/woocommerce-admin/src/API/Reports/Downloads/Controller.php 114
$response->data['file_name'] = apply_filters( 'woocommerce_file_download_filename', $filename, $product_id );

Where in WP core the hook is used WooCommerce

Usage not found.