使用php开发Websocket，打造实时天气预报功能

{
    "require": {
        "cboden/ratchet": "^0.4"
    }
}

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

use RatchetMessageComponentInterface;
use RatchetConnectionInterface;
use RatchetServeriOServer;
use RatchetHttphttpserver;
use RatchetWebSocketWsServer;

class WeatherForecast implements MessageComponentInterface
{
    public function onOpen(ConnectionInterface $conn)
    {
        // 当有新的客户端连接时，触发该方法
    }

    public function onClose(ConnectionInterface $conn)
    {
        // 当有客户端断开连接时，触发该方法
    }

    public function onMessage(ConnectionInterface $from, $msg)
    {
        // 当收到客户端发送的消息时，触发该方法
    }

    public function onError(ConnectionInterface $conn, Exception $e)
    {
        // 当发生错误时，触发该方法
    }

    public function broadcastMessage($msg)
    {
        // 向所有连接的客户端广播消息
    }
}

$server = IoServer::factory(
    new HttpServer(
        new WsServer(
            new WeatherForecast()
        )
    ),
    8080
);

$server->run();

public function onOpen(ConnectionInterface $conn)
{
    $url = 'https://api.weatherapi.com/v1/current.json?key=YOUR_API_KEY&q=Beijing';
    $response = file_get_contents($url);
    $data = json_decode($response, true);

    // 处理天气预报数据，比如将数据发送给客户端
}

public function onOpen(ConnectionInterface $conn)
{
    $url = 'https://api.weatherapi.com/v1/current.json?key=YOUR_API_KEY&q=Beijing';
    $response = file_get_contents($url);
    $data = json_decode($response, true);

    $this->broadcastMessage($data['current']);
}

public function onMessage(ConnectionInterface $from, $msg)
{
    if ($msg === 'getWeather') {
        $url = 'https://api.weatherapi.com/v1/current.json?key=YOUR_API_KEY&q=Beijing';
        $response = file_get_contents($url);
        $data = json_decode($response, true);

        $from->send($data['current']);
    }
}

<script>
    const socket = new WebSocket('ws://localhost:8080');

    socket.onopen = function(event) {
        socket.send('getWeather');
    }

    socket.onmessage = function(event) {
        const weatherData = JSON.parse(event.data);

        // 处理天气预报数据，比如展示在网页上
    }
</script>