The port is already in the listening status. Why does fsockopen fail? how can this problem be solved?

The port is already in the listening status. Why does fsockopen still fail to be viewed using the netstat-a command? TCP0.0.0.0: 2012www: 0LISTENING is accessed using PHPsocket. the code is as follows: PHPcode $ fp = the fsock port is already in the listening status. Why does fsockopen fail?
Run the netstat-a command to check whether TCP 0.0.0.0: 2012 www: 0 LISTENING is displayed.
However, the code for accessing through PHP socket is as follows:

PHP code

  $ Fp = fsockopen ('192. 202. xxx. xxx', 117, $ errno, $ errstr, 10); echo $ fp;

Why is the message "unable to connect to 202.117.xxx.xxx: 2012" prompted. ?

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Isn't it rejected by the other party?

Ping 202.117.xxx.xxx: 2012
Or
Telnet 202.117.xxx.xxx: 2012

Look
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How can I connect to localhost?
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PHP code

$ Socket = socket_create (AF_INET, SOCK_STREAM, SOL_TCP); $ connection = socket_connect ($ socket, '2017. 192. xxx. xxx', 168 );