Examples of TCP server and client functions implemented by PHP programming

This article mainly introduces the implementation of PHP programming TCP server and client functions, combined with an example of PHP based on the socket to implement the TCP servers and client communication functions related to the configuration, definition and use of skills, the need for friends can refer to the next

This article describes the TCP server and client functions implemented by PHP programming. Share to everyone for your reference, as follows:

1, modify php.ini, open extension=php_sockets.dll

2. Service-side program socketserver.php

<?php//Ensure that the client is connected without time-out set_time_limit (0);//Set IP and port number $address = "127.0.0.1"; $port = 3046;/** * Create a socket * af_inet= Is IPv4 if you use IPv6, the parameter is Af_inet6 * Sock_stream is the TCP type of the socket, and if it is UDP sock_dgram*/$sock = socket_create (Af_inet, Sock_ STREAM, sol_tcp) or Die ("Socket_create () Fail:"). Socket_strerror (Socket_last_error ()). "/n");//block Mode Socket_set_block ($sock) or Die ("Socket_set_block () Fail:"). Socket_strerror (Socket_last_error ()). "/n");//bind to the socket port $result = Socket_bind ($sock, $address, $port) or Die ("Socket_bind () Fail:"). Socket_strerror (Socket_last_error ()). "/n");//start monitoring $result = Socket_listen ($sock, 4) or Die ("Socket_listen () Fail:"). Socket_strerror (Socket_last_error ()). "/n"); echo "ok\nbinding the socket on $address: $port ... "Echo" Ok\nnow ready to accept connections.\nlistening on the socket ... \ n ";d o {//Never stop the daemon//it receives the connection request and invokes a A child connects the socket to handle information between the client and the server $msgsock = socket_accept ($sock) or Die ("Socket_accept () Failed:reason:". Socket_strerror (Socket_last_error ()). "/n ");    while (1) {//reads the client data echo "read-client" \ n "; The Socket_read function reads the client data until it encounters the \n,\t or the/s character.    The PHP script considers this character to be the input terminator.    $buf = Socket_read ($msgsock, 8192);    echo "Received msg: $buf \ n";      if ($buf = = "Bye") {//Receive the end message, close the connection, wait for the next connection socket_close ($msgsock);    Continue    }//Data transfer writes The returned result to the client $msg = "Welcome \ n"; Socket_write ($msgsock, $msg, strlen ($msg)) or Die ("Socket_write () Failed:reason:". Socket_strerror (Socket_last_error ()). "  /n "); }} while (true); Socket_close ($sock);? >

3. Client program socketclient.php

<?phpset_time_limit (0); $host = "127.0.0.1"; $port = 3046; $socket = Socket_create (Af_inet, Sock_stream, sol_tcp) or die ("Could not create socket\n"): $connection = Socket_connect ($socket, $host, $port) or Die ("Could not connet server\n"); sock Et_write ($socket, "hello socket") or Die ("Write failed\n") and while ($buff = Socket_read ($socket, 1024x768, php_normal_read)) { C0/>echo ("Response was:".) $buff. "\ n");  Echo ("Input want to say to the server:\n");  $text = fgets (STDIN);  Socket_write ($socket, $text);} Socket_close ($socket);? >

4. Testing

Running the service-side program:C:\wamp\bin\php\php5.4.16\php.exe C:\wamp\www\SocketServer.php

Running the client program: C:\wamp\bin\php\php5.4.16\php.exe C:\wamp\www\SocketClient.php

If you encounter

Fatal error:call to undefined function socket_create ().

1. Find php.ini, see extension=php_gd2.dll and extension=php_sockets.dll expand whether open;

2. Look at phpInfo() the contents of the display, whether the socket module is enable;

I checked it out and found it all in line. But the error still occurs? What's going on here?

Later I found that the original is what I phpInfo() saw in the CMD window and the use of PHP is not the same thing.

The reason is that I have installed PHP several times. The previous PHP registered path within the system's environment variables. So the cmd window is used in the previous PHP. Instead, the phpInfo() current PHP settings are displayed.

The solution is very simple, the system environment variable in the path, pointing to the old PHP paths to the PHP used to point to the path. So php in cmd and PHP in the browser is the same thing.

That's it.

5, its process and C language very similar, in fact, is encapsulated C language socket.

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