UDP/Datagram Sockets with ReactPHP
When you send data through the sockets, there are situations when you really do not care if some packets are lost during the transition. For example, you are streaming a live video from your camera. The order of the frames is less important than timely delivery, you only want the frames to arrive at the clients as soon as possible. And it also does not matter if some of the frames are lost. You are not going to make a resend request just to make sure that all the frames are shown to the client in the correct order because otherwise your live video will be delayed.