(PECL swoole >= 1.9.0)
Swoole\Client::sendto — Send data to the remote UDP address.
The swoole client should be type of SWOOLE_SOCK_UDP or SWOOLE_SOCK_UDP6.
ip
The IP address of remote host, IPv4 or IPv6.
port
The port number of remote host.
data
The data to send which should be less-than 64K.