demo实现的简单功能是，接受php端写入的字符串，然后原样返回给输出端。代码如下：
复制代码 代码如下:
import java.io.*;
import java.net.*;
public class server {
public static void main(string[] args) throws ioexception{
  system.out.println(server started !\n);
  serversocket server=new serversocket(5678);
  while (true){
                socket client=server.accept();
                system.out.println(client coming!\n);
                printwriter printer = new printwriter(client.getoutputstream());
                bufferedreader reader = new bufferedreader(new inputstreamreader(client.getinputstream()));
                string  m = reader.readline();
                system.out.println(get infomation + m + \n from + client.getinetaddress().tostring());
                printer.println(m);
                printer.flush();
                printer.close();
                printer.close();
                client.close();
                system.out.println(client leaving!\n);
              }
        }
}
运行起来，以后该java程序将监听5678端口，当接收到消息以后，将接收的消息原样返回给客户端……
php的代码如下：
复制代码 代码如下:
    $socket = socket_create ( af_inet, sock_stream, sol_tcp ) or die ( 'could not create socket' );
    $connect = socket_connect ( $socket, '127.0.0.1', 5678 );
    //向服务端发送数据
    socket_write ( $socket, 'hello' . \n );
    //接受服务端返回数据
    $str = socket_read ( $socket, 1024, php_normal_read );
echo $str;
    //关闭
    socket_close($socket);
php程序连接本机的5678端口，写入 hello，然后读取返回的数据……将返回的数据，输出到浏览器……
先运行起java的服务端，然后用浏览器访问php页面，将看到从服务器端返回的hello