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php 实现 tcp

2026-03-12 16:41:59PHP

PHP 实现 TCP 通信的方法

PHP 可以通过多种方式实现 TCP 通信，以下是常见的几种方法：

使用 socket 扩展

PHP 内置的 socket 扩展可以创建 TCP 服务器和客户端。以下是一个简单的 TCP 服务器和客户端示例：

TCP 服务器端代码

<?php
$host = '127.0.0.1';
$port = 12345;

$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
socket_bind($socket, $host, $port);
socket_listen($socket);

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

while (true) {
    $client = socket_accept($socket);
    $message = socket_read($client, 1024);
    echo "Received: $message\n";
    socket_write($client, "Message received");
    socket_close($client);
}

socket_close($socket);
?>

TCP 客户端代码

<?php
$host = '127.0.0.1';
$port = 12345;

$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
socket_connect($socket, $host, $port);

socket_write($socket, "Hello Server");
$response = socket_read($socket, 1024);
echo "Server response: $response\n";

socket_close($socket);
?>

使用 stream_socket 函数

PHP 的流函数也支持 TCP 通信，以下是使用流函数的示例：

TCP 服务器端

<?php
$host = '127.0.0.1';
$port = 12345;

$server = stream_socket_server("tcp://$host:$port", $errno, $errstr);
if (!$server) {
    die("$errstr ($errno)");
}

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

while ($conn = stream_socket_accept($server)) {
    $data = fread($conn, 1024);
    echo "Received: $data\n";
    fwrite($conn, "Message received");
    fclose($conn);
}

fclose($server);
?>

TCP 客户端

<?php
$host = '127.0.0.1';
$port = 12345;

$fp = stream_socket_client("tcp://$host:$port", $errno, $errstr, 30);
if (!$fp) {
    die("$errstr ($errno)");
}

fwrite($fp, "Hello Server");
$response = fread($fp, 1024);
echo "Server response: $response\n";

fclose($fp);
?>

使用 ReactPHP 库

对于更复杂的 TCP 应用，可以使用 ReactPHP 库，它提供了事件驱动的编程模型：

安装 ReactPHP

composer require react/socket

TCP 服务器示例

<?php
require 'vendor/autoload.php';

$loop = React\EventLoop\Factory::create();
$socket = new React\Socket\Server('127.0.0.1:12345', $loop);

$socket->on('connection', function (React\Socket\ConnectionInterface $connection) {
    echo "New connection\n";

    $connection->on('data', function ($data) use ($connection) {
        echo "Received: $data\n";
        $connection->write("Message received");
    });

    $connection->on('close', function () {
        echo "Connection closed\n";
    });
});

echo "Server listening on 127.0.0.1:12345\n";
$loop->run();
?>

TCP 客户端示例

php 实现 tcp

<?php
require 'vendor/autoload.php';

$loop = React\EventLoop\Factory::create();
$connector = new React\Socket\Connector($loop);

$connector->connect('127.0.0.1:12345')->then(function (React\Socket\ConnectionInterface $connection) {
    $connection->write("Hello Server");

    $connection->on('data', function ($data) {
        echo "Server response: $data\n";
    });
});

$loop->run();
?>