php socket通信教程

$host = '127.0.0.1';
$port = 8080;

// 创建 socket
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if (!$socket) {
    echo "socket_create() failed: " . socket_strerror(socket_last_error()) . "\n";
    exit;
}

// 绑定
socket_bind($socket, $host, $port);

// 监听
socket_listen($socket);

echo "Server listening on $host:$port...\n";

// 接受客户端连接
$clientSocket = socket_accept($socket);
if (!$clientSocket) {
    echo "socket_accept() failed: " . socket_strerror(socket_last_error($socket)) . "\n";
    exit;
}

// 读取并输出客户端发送的数据
$data = socket_read($clientSocket, 1024);
echo "Received from client: $data\n";

// 向客户端发送响应
$response = "Hello from server!";
socket_write($clientSocket, $response);

// 关闭连接
socket_close($clientSocket);
socket_close($socket);

$host = '127.0.0.1';
$port = 8080;

// 创建 socket
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if (!$socket) {
    echo "socket_create() failed: " . socket_strerror(socket_last_error()) . "\n";
    exit;
}

// 连接到服务器
$result = socket_connect($socket, $host, $port);
if (!$result) {
    echo "socket_connect() failed. Reason: " . socket_strerror(socket_last_error($socket)) . "\n";
    exit;
}

// 向服务器发送数据
$message = "Hello, server!";
socket_write($socket, $message);

// 从服务器接收响应
$response = socket_read($socket, 1024);
echo "Server response: $response\n";

// 关闭连接
socket_close($socket);