用PHP的socket实现客户端到服务端的通信

服务端

<?php
error_reporting(E_ALL);
set_time_limit(0);
ob_implicit_flush();
//本地IP
$address = 'localhost';
//设置用111端口进行通信
$port = 111;
//创建SOCKET
if (($sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) < 0) {
		echo "socket创建失败原因 " . socket_strerror($sock) . "
";
}

if (($ret = socket_bind($sock, $address, $port)) < 0) {
		echo "创建套接字失败原因 " . socket_strerror($ret) . "
";
}
//监听
if (($ret = socket_listen($sock, 5)) < 0) {
		echo "监听失败原因 " . socket_strerror($ret) . "
";
}
do {
	//接收命令 
	if (($msgsock = @socket_accept($sock)) < 0) {
		echo "命令接收失败原因: " . socket_strerror($msgsock) . "
";
		break;
	}
	$msg = "
PHP Test Server. 
" ."用quit,shutdown,sun...等命令测试.
";

	@socket_write($msgsock, $msg, strlen($msg));

	do {
		if (false === ($buf = @socket_read($msgsock, 2048, PHP_NORMAL_READ))) {
				echo "socket_read() failed: reason: " . socket_strerror($ret) . "
";
				break 2;
		}
		if (!$buf = trim($buf)) {
				continue;
		}
		if ($buf == 'quit') {
				break;
		}
		if ($buf == 'shutdown') {
				socket_close($msgsock);
				break 2;
		}
		if ($buf == 'sun') {
				echo'what are you doing?';
		}
		$talkback = "Backinformation : '$buf'.
";
		socket_write($msgsock, $talkback, strlen($talkback));
		echo "$buf
";
	} while (true);

	socket_close($msgsock);

} while (true);

socket_close($sock);
?>

客户端代码

<?php
error_reporting(E_ALL);
//端口111
$service_port = 111;
//本地
$address = 'localhost';
//创建 TCP/IP socket
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if ($socket < 0) {
		echo "socket创建失败原因: " . socket_strerror($socket) . "
";
} else {
		echo "OK，HE HE.
";
}
$result = socket_connect($socket, $address, $service_port);
if ($result < 0) {
		echo "SOCKET连接失败原因: ($result) " . socket_strerror($result) . "
";
} else {
		echo "OK.
";
}
//发送命令
$in = "HEAD / HTTP/1.1
";
$in .= "Connection: Close

";
$out = '';
echo "Send Command..........";
$in = "sun
";
socket_write($socket, $in, strlen($in));
echo "OK.
";
echo "Reading Backinformatin:

";
while ($out = socket_read($socket, 2048)) {
		echo $out;
}
echo "Close socket........";
socket_close($socket);
echo "OK,He He.

";
?>

这两段代码是简单介绍用PHP实现客户端和服务端的通信
client.php
server.php
具体操作,在DOS下用PHP命令打开SERVER,处于监听状态..
再打开一个DOS窗口,用PHP命令打开CLIENT,会得到服务端的回应....