Implement Real-Time Video Chat with PHP, Swoole WebSocket, and WebRTC
This tutorial explains how to build a real‑time video chat application using PHP with the Swoole WebSocket extension and WebRTC, covering environment setup, server and client code, and steps to run the system.
With the growth of network and information technology, video communication has become increasingly important, and real‑time video chat is a common requirement in web applications.
Step 1: Check Environment and Preparations
Ensure the server runs PHP ≥5.4, the client browser supports WebRTC (modern browsers such as Chrome or Firefox), and the camera driver is installed correctly.
Step 2: Set Up the Server
Create a videochat directory with client and server sub‑folders. In the server folder, add index.php and write the following Swoole WebSocket server code:
<?php
// Create a WebSocket server
$server = new swoole_websocket_server("0.0.0.0", 9501);
// Listen for connection open
$server->on('open', function (swoole_websocket_server $server, $request) {
echo "connected
";
});
// Listen for messages
$server->on('message', function (swoole_websocket_server $server, $frame) {
// Broadcast received message to all clients
foreach ($server->connections as $fd) {
$server->push($fd, $frame->data);
}
});
// Listen for connection close
$server->on('close', function ($ser, $fd) {
echo "closed
";
});
// Start the server
$server->start();
?>The code uses the Swoole extension to create a WebSocket server and handles open, message, and close events.
Step 3: Write the Client Code
In the client folder, create index.html with the following HTML and JavaScript, which opens a WebSocket connection, captures the webcam stream, and sends frames to the server:
<![DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Video Chat</title>
<script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
<script>
// Create WebSocket connection
var ws = new WebSocket("ws://localhost:9501");
// Connection opened
ws.onopen = function () {
console.log("connected");
};
// Listen for messages
ws.onmessage = function (e) {
console.log(e.data);
};
// Connection closed
ws.onclose = function () {
console.log("closed");
};
// Error handling
ws.onerror = function (e) {
console.log("error", e);
};
// Capture webcam frames and send to server
function capture() {
var video = document.getElementById('video');
var canvas = document.createElement('canvas');
canvas.width = video.videoWidth;
canvas.height = video.videoHeight;
var context = canvas.getContext('2d');
context.drawImage(video, 0, 0, canvas.width, canvas.height);
var dataURL = canvas.toDataURL('image/jpeg');
ws.send(dataURL);
setTimeout(capture, 100);
}
// Start capturing after page load
$(document).ready(function () {
capture();
});
</script>
</head>
<body>
<video id="video" autoplay></video>
</body>
</html>This client creates a WebSocket connection, listens for events, and continuously captures the webcam image, converting it to a JPEG data URL that is sent to the server.
Step 4: Run the Application
Start the server by navigating to the server directory and executing php index.php. Then open client/index.html in a browser to begin real‑time video chatting.
Conclusion
The guide provides a straightforward way to implement real‑time video chat with PHP, Swoole, and WebRTC, offering a foundation that can be extended with additional features.
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