Sandbox::https://github.com/beyondcode/http/blob/websocket-support/examples/53-server-whatsmyip.php

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<?php

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

$http = new React\Http\HttpServer(function (Psr\Http\Message\ServerRequestInterface $request) {

$body = "Your IP is: " . $request->getServerParams()['REMOTE_ADDR'] . "\n";

return React\Http\Message\Response::plaintext(

$body

);

});

$socket = new React\Socket\SocketServer(isset($argv[1]) ? $argv[1] : '0.0.0.0:0');

$http->listen($socket);

echo 'Listening on ' . str_replace('tcp:', 'http:', $socket->getAddress()) . PHP_EOL;