lrdgz/readme.md

## readme.md

      
    Raw
  

              readme.md
            
          
    Engagement
Start in shell WebSocket server: php -q websockets.php.
Start in shell WebSocket client: php -S 127.0.00.1:8000 websockets.html please use separated tab in terminal.
Test
Open in browser URL: http://0.0.0.0:8000/ you will see current timestamp which will continuously updating! Hence, it works!
Conclusion
This is just super simple PHP WebSocket example.
Yes, it isn’t real world example, but it is as simple as possible sample
which you can use as starting basis for your next experiments!

  
## websockets.html
<html>
<body>
    <div id="root"></div>
    <script>
        var host = 'ws://127.0.0.1:12345/websockets.php';
        var socket = new WebSocket(host);
        socket.onmessage = function(e) {
            document.getElementById('root').innerHTML = e.data;
        };
    </script>
</body>
</html>

## websockets.php
<?php
$address = '127.0.0.1';
$port = 12345;

// Create WebSocket.
$server = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
socket_set_option($server, SOL_SOCKET, SO_REUSEADDR, 1);
socket_bind($server, $address, $port);
socket_listen($server);
$client = socket_accept($server);

// Send WebSocket handshake headers.
$request = socket_read($client, 5000);
preg_match('#Sec-WebSocket-Key: (.*)\r\n#', $request, $matches);
$key = base64_encode(pack(
    'H*',
    sha1($matches[1] . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11')
));
$headers = "HTTP/1.1 101 Switching Protocols\r\n";
$headers .= "Upgrade: websocket\r\n";
$headers .= "Connection: Upgrade\r\n";
$headers .= "Sec-WebSocket-Version: 13\r\n";
$headers .= "Sec-WebSocket-Accept: $key\r\n\r\n";
socket_write($client, $headers, strlen($headers));

// Send messages into WebSocket in a loop.
while (true) {
    sleep(1);
    $content = 'Now: ' . time();
    $response = chr(129) . chr(strlen($content)) . $content;
    socket_write($client, $response);
}
	<html>
	<body>
	<div id="root"></div>
	<script>
	var host = 'ws://127.0.0.1:12345/websockets.php';
	var socket = new WebSocket(host);
	socket.onmessage = function(e) {
	document.getElementById('root').innerHTML = e.data;
	};
	</script>
	</body>
	</html>
	<?php
	$address = '127.0.0.1';
	$port = 12345;

	// Create WebSocket.
	$server = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
	socket_set_option($server, SOL_SOCKET, SO_REUSEADDR, 1);
	socket_bind($server, $address, $port);
	socket_listen($server);
	$client = socket_accept($server);

	// Send WebSocket handshake headers.
	$request = socket_read($client, 5000);
	preg_match('#Sec-WebSocket-Key: (.*)\r\n#', $request, $matches);
	$key = base64_encode(pack(
	'H*',
	sha1($matches[1] . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11')
	));
	$headers = "HTTP/1.1 101 Switching Protocols\r\n";
	$headers .= "Upgrade: websocket\r\n";
	$headers .= "Connection: Upgrade\r\n";
	$headers .= "Sec-WebSocket-Version: 13\r\n";
	$headers .= "Sec-WebSocket-Accept: $key\r\n\r\n";
	socket_write($client, $headers, strlen($headers));

	// Send messages into WebSocket in a loop.
	while (true) {
	sleep(1);
	$content = 'Now: ' . time();
	$response = chr(129) . chr(strlen($content)) . $content;
	socket_write($client, $response);
	}