PHPsocket Lan inaccessible

Php writes a socket, and there is no problem with accessing the same PC. if you place the server code in another pc on the LAN, you will not be able to access it. I tried to capture packets many times and read it, the package has been sent to the local machine, but the PHPSERVER shows that the package is not received.

Php writes a socket, and there is no problem with accessing the same PC. if you place the server code in another pc on the LAN, you will not be able to access it. I tried it many times.

Capture the packet and check that the packet has been sent to the local machine, but the php server shows that the packet is not received

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Php writes a socket, and there is no problem with accessing the same PC. if you place the server code in another pc on the LAN, you will not be able to access it. I tried it many times.

Capture the packet and check that the packet has been sent to the local machine, but the php server shows that the packet is not received

The daily firewall is forgotten.