php编写TCP服务端和客户端程序

From: /article/2152256.html

1、修改php.ini，打开extension=php_sockets.dll

2、服务端程序SocketServer.php

[php] view plaincopyprint?

<?php

//确保在连接客户端时不会超时

set_time_limit(0);

//设置IP和端口号

$address = "127.0.0.1";

$port = 3046;

/**

* 创建一个SOCKET

* AF_INET=是ipv4 如果用ipv6，则参数为 AF_INET6

* SOCK_STREAM为socket的tcp类型，如果是UDP则使用SOCK_DGRAM

*/

$sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP) or die("socket_create() fail:" . socket_strerror(socket_last_error()) . "/n");

//阻塞模式

socket_set_block($sock) or die("socket_set_block() fail:" . socket_strerror(socket_last_error()) . "/n");

//绑定到socket端口

$result = socket_bind($sock, $address, $port) or die("socket_bind() fail:" . socket_strerror(socket_last_error()) . "/n");

//开始监听

$result = socket_listen($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";

do { // never stop the daemon

//它接收连接请求并调用一个子连接Socket来处理客户端和服务器间的信息

$msgsock = socket_accept($sock) or die("socket_accept() failed: reason: " . socket_strerror(socket_last_error()) . "/n");

while(1){

//读取客户端数据

echo "Read client data \n";

//socket_read函数会一直读取客户端数据,直到遇见\n,\t或者\0字符.PHP脚本把这写字符看做是输入的结束符.

$buf = socket_read($msgsock, 8192);

echo "Received msg: $buf \n";

if($buf == "bye"){

//接收到结束消息，关闭连接，等待下一个连接

socket_close($msgsock);

continue;

}

//数据传送 向客户端写入返回结果

$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、客户端程序SocketClient.php

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<?php

set_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");

socket_write($socket, "hello socket") or die("Write failed\n");

while ($buff = socket_read($socket, 1024, PHP_NORMAL_READ)) {

echo("Response was:" . $buff . "\n");

echo("input what you want to say to the server:\n");

$text = fgets(STDIN);

socket_write($socket, $text);

}

socket_close($socket);

?>

4、测试

运行服务端程序：C:\wamp\bin\php\php5.4.16\php.exe
C:\wamp\www\SocketServer.php

运行客户端程序： C:\wamp\bin\php\php5.4.16\php.exe
C:\wamp\www\SocketClient.php

5、其流程与C很相似，实际上就是封装了C的socket。