是否有区别?
shutdown($socket,0) if $socket;
shutdown($socket,2) if $socket;
close($socket) if $socket;
和
shutdown($socket,2) if $socket;
close($socket) if $socket;
也有区别
shutdown($socket,1) if $socket;
shutdown($socket,2) if $socket;
close($socket) if $socket;
最后还是需要关闭吗?