Questions about phpsocket

Phpsocket problems! In a recent project, php & nbsp; socket communication is required. now I have tested & nbsp;. in TCP, the client can be successfully sent to the server, the server can also return client information. However, in UDP, the program may have problems. you can receive the information on the client, but you can use soc for php socket problems!
A recent project requires php socket communication. now I have tested that the client can be successfully sent to the server under TCP, and the server can also return the client information.
However, in UDP, the program will have a problem. you can receive the information on the client, but if socket_write () is returned, the returned address cannot be found... Then the client cannot accept the information returned by the server!
In this case, I want to help solve this problem.

PHP Warning: socket_write (): unable to write to socket [0]: The socket is not connected.
And (when a sendto call is used to send a datagram socket) no address is provided to send or receive data requests.
Not accepted. ? Socket? Php udp socket_write () shared:
------ Solution --------------------
No. the error message above is clear, that is, there is no connection or the address is incorrect.
Let's look at the code. it's useless to guess.