WordPress at a glance
filter is not described

woocommerce_downloadable_file_permission filter-hook . WC 1.0

Usage

add_filter( 'woocommerce_downloadable_file_permission', 'filter_function_name_88', 10, 4 );
function filter_function_name_88( $download, $product, $order, $qty ){
	// filter...

	return $download;
}
$download
-
$product
-
$order
-
$qty
-

Where the hook is called

wc_downloadable_file_permission()
woocommerce_downloadable_file_permission
woocommerce/includes/wc-order-functions.php 393
$download = apply_filters( 'woocommerce_downloadable_file_permission', $download, $product, $order, $qty );

Where in WP core the hook is used WooCommerce

Usage not found.