服务器
<?php
// 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!\n";
else
echo "socket_create() failed:".socket_strerror ($socket)."\n";

$bind = socket_bind ($socket, $ip, $port); // 绑定一个socket
if ($bind)
echo "socket_bind() successed!\n";
else
echo "socket_bind() failed:".socket_strerror ($bind)."\n";

$listen = socket_listen ($socket);  // 间听socket
if ($listen)
echo "socket_listen() successed!\n";
else
echo "socket_listen() failed:".socket_strerror ($listen)."\n";

while (true)
{
$msg = socket_accept ($socket);  // 接受一个socket
if (!$msg)
{
echo "socket_accept() failed:".socket_strerror ($msg)."\n";
break;
}
$welcome = "welcome to php server!\n";
socket_write ($msg, $welcome, strlen ($welcome));
while (true)
{
$command = strtoupper (trim (socket_read ($msg, 1024)));
if (!$command)
break;
switch ($command)
{
case "hello":
$writer = "hello everybody!";
break;
case "quit":
$writer = "bye-bye";
break;
case "help":
$writer = "hello\tquit\thelp";
break;
default:
$writer = "error command!";
}
socket_write ($msg, $writer, strlen ($writer));
if ($command == "quit")
break;
}
socket_close ($msg);
}

socket_close ($socket);  // 关闭socket
?>

客户端
<?php
// client
// 设置错误处理
error_reporting (e_all);
// 设置处理时间
set_time_limit (0);

$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!\n";
else
echo "socket_create() failed:".socket_strerror ($socket)."\n";

$conn = socket_connect ($socket, $ip, $port);  // 建立socket的连接
if ($conn)
echo "success to connection![".$ip.":".$port."]\n";
else
echo "socket_connect() failed:".socket_strerror ($conn)."\n";

echo&