(PECL gupnp >= 0.1.0)
gupnp_service_proxy_callback_set — Set service proxy callback for signal
$proxy
, int $signal
, mixed $callback
[, mixed $arg
] ) : boolSet service proxy callback for signal.
proxyA service proxy identifier.
signalThe value of signal.
GUPNP_SIGNAL_SUBSCRIPTION_LOSTcallback
The callback function for the certain signal. Typically, callback function
takes on two parameters. error parameter's message
being the first, and the arg is second.
arg
User data for callback.
成功时返回 TRUE， 或者在失败时返回 FALSE。
Issues E_WARNING either with not valid callback function or with not valid signal.