PHP SOCKET编程！

SERVER.PHP

<?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=服务器自己的IP;
$port=端口号;

//创建一个SOCKET
if(($sock=socket_create(AF_INET,SOCK_STREAM,SOL_TCP))<0)
{
   echo "socket_create() 失败的原因是:".socket_strerror($sock)."<br>";
}

//绑定到socket端口
if(($ret=socket_bind($sock,$address,$port))<0)
{
   echo "socket_bind() 失败的原因是:".socket_strerror($ret)."<br>";
}

//开始监听
if(($ret=socket_listen($sock,4))<0)
{
   echo "socket_listen() 失败的原因是:".socket_strerror($ret)."<br>";
}

do {
      if (($msgsock = socket_accept($sock)) < 0)
     {
       echo "socket_accept() failed: reason: " . socket_strerror($msgsock) . "\n";
        break;
     }

     //发到客户端
     $msg ="<font color=red>服务器端发送:欢迎进入服务器！</font><br>";
     socket_write($msgsock, $msg, strlen($msg));

     echo "读取客户端发来的信息<br>";
     $buf=socket_read($msgsock,8192);
   

     $talkback = "收到的信息$buf<br>";
     echo $talkback;
       if(socket_write($msgsock, $talkback, strlen($talkback))<0)
     {
      echo "socket_write() failed: reason: " . socket_strerror($msgsock) . "\n";
     }
     else
     {
      echo "发送成功";
     }

  
    echo $buf;
    socket_close($msgsock);
   } while (true);

   socket_close($sock);
?> 

CLIENT.PHP

<?php
error_reporting(E_ALL);
set_time_limit(0);
echo "<h2>TCP/IP Connection</h2>\n";

$service_port = 服务器端口;
$address = "服务器IP";


$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if ($socket < 0)
{
   echo "socket_create() failed: reason: " . socket_strerror($socket) . "\n";
}
else
{
   echo "OK.\n";
}

echo "试图连接 '$address' 端口 '$service_port'...<br>";
$result = socket_connect($socket, $address, $service_port);
if ($result < 0)
   {
    echo "socket_connect() failed.\nReason: ($result) " . socket_strerror($result) . "\n";
   }
   else
   {
    echo "连接OK<br>";
   }

$in = "发送到服务器的信息\r\n";
$in .= "也是发到服务器的\r\n";
$out = '';
$out1='';


   if(!socket_write($socket, $in, strlen($in)))
   {
    echo "socket_write() failed: reason: " . socket_strerror($socket) . "\n";
   }
   else
   {
    echo "发送到服务器信息成功！<br>";
   }


   while($out = socket_read($socket, 8192))
   {
    echo "接收服务器回传信息成功！<br>";
    echo $out;
   }


   echo "关闭SOCKET...<br>";
   socket_close($socket);
   echo "关闭OK<br>";
?>