用PHP开发C/S结构（一个简单的例子）_PHP教程

服务器
// Server
// 设置错误处理
error_reporting (E_ALL);
// 设置运行时间
set_time_limit (0);
// 起用缓冲
ob_implicit_flush ();
$ip = "127.0.0.1";        // IP地址
$port = 1000;        // 端口号
$socket = socket_create (AF_INET, SOCK_STREAM, SOL_TCP);    // 创建一个SOCKET
if ($socket)
    echo "socket_create() successed! ";
else
    echo "socket_create() failed:".socket_strerror ($socket)." ";
$bind = socket_bind ($socket, $ip, $port);           // 绑定一个SOCKET
if ($bind)
    echo "socket_bind() successed! ";
else
    echo "socket_bind() failed:".socket_strerror ($bind)." ";
$listen = socket_listen ($socket);            // 间听SOCKET
if ($listen)
    echo "socket_listen() successed! ";
else
    echo "socket_listen() failed:".socket_strerror ($listen)." ";
while (true)
{
    $msg = socket_accept ($socket);            // 接受一个SOCKET
    if (!$msg)
    {
        echo "socket_accept() failed:".socket_strerror ($msg)." ";
        break;
    }
    $welcome = "Welcome to PHP Server! ";
    socket_write ($msg, $welcome, strlen ($welcome));
    while (true)

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