(PECL gupnp >= 0.1.0)
Set device callback function
bool gupnp_device_action_callback_set ( resource $root_device, int $signal, string $action_name, mixed $callback [, mixed $arg ] )
Set device callback function for signal and action.
Parameters:
root_device
A root device identifier, returned by gupnp_root_device_new().
signal
The val