PHP를 사용하여 네트워크 통신을 구현하는 방법은 무엇입니까?

<?php
// 创建TCP连接
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if ($socket === false) {
    echo "socket_create() failed: " . socket_strerror(socket_last_error()) . "
";
}

// 连接到服务器
$result = socket_connect($socket, 'www.example.com', 80);
if ($result === false) {
    echo "socket_connect() failed: " . socket_strerror(socket_last_error($socket)) . "
";
}

// 发送数据
$message = "GET / HTTP/1.1
Host: www.example.com

";
socket_write($socket, $message, strlen($message));

// 接收响应
$response = '';
while ($buffer = socket_read($socket, 1024)) {
    $response .= $buffer;
}

// 关闭连接
socket_close($socket);

// 输出响应
echo $response;
?>

composer require guzzlehttp/guzzle

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

use GuzzleHttpClient;

$client = new Client();
$response = $client->request('GET', 'https://www.example.com');

echo $response->getBody();
?>