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怎么用PHP和WebSocket獲取實時數(shù)據(jù)

小億
117
2024-04-29 16:56:48
欄目: 編程語言

要使用PHP和WebSocket獲取實時數(shù)據(jù)，您需要先創(chuàng)建一個WebSocket服務(wù)器來接收和發(fā)送實時數(shù)據(jù)。

以下是一個簡單的示例代碼，您可以使用PHP和Ratchet庫來創(chuàng)建WebSocket服務(wù)器：

  1. 首先，安裝Ratchet庫：
composer require cboden/ratchet
  1. 創(chuàng)建一個WebSocket服務(wù)器的PHP文件（server.php）：
<?php
require 'vendor/autoload.php';

use Ratchet\MessageComponentInterface;
use Ratchet\ConnectionInterface;

class MyWebSocketServer implements MessageComponentInterface {
    protected $clients;

    public function __construct() {
        $this->clients = new \SplObjectStorage;
    }

    public function onOpen(ConnectionInterface $conn) {
        $this->clients->attach($conn);
        echo "New connection! ({$conn->resourceId})\n";
    }

    public function onMessage(ConnectionInterface $from, $msg) {
        foreach ($this->clients as $client) {
            if ($client !== $from) {
                $client->send($msg);
            }
        }
    }

    public function onClose(ConnectionInterface $conn) {
        $this->clients->detach($conn);
        echo "Connection {$conn->resourceId} has disconnected\n";
    }

    public function onError(ConnectionInterface $conn, \Exception $e) {
        echo "An error has occurred: {$e->getMessage()}\n";
        $conn->close();
    }
}

$server = new \Ratchet\Server\IoServer(
    new \Ratchet\Http\HttpServer(
        new \Ratchet\WebSocket\WsServer(
            new MyWebSocketServer()
        )
    ),
    8080
);

echo "WebSocket server started\n";

$server->run();
  1. 運行WebSocket服務(wù)器：
php server.php
  1. 創(chuàng)建一個簡單的HTML文件來連接WebSocket服務(wù)器并接收實時數(shù)據(jù)（index.html）：
<!DOCTYPE html>
<html>
<head>
    <title>Real-time Data</title>
</head>
<body>
    <ul id="messages"></ul>
    
    <script>
        var conn = new WebSocket('ws://localhost:8080');

        conn.onmessage = function(e) {
            var messages = document.getElementById('messages');
            var message = document.createElement('li');
            message.innerHTML = e.data;
            messages.appendChild(message);
        };
    </script>
</body>
</html>

將index.html文件放在您的Web服務(wù)器上，并打開它以連接到WebSocket服務(wù)器并接收實時數(shù)據(jù)。您可以在WebSocket服務(wù)器的onMessage方法中發(fā)送實時數(shù)據(jù)并在客戶端接收和顯示。

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