This is a script that fuse a Phalcon and Swoole frameworks.

Phalcon + Swoole starter.php

<?php
/**
 * Author: Maulana Satya Adi
 * Email: maulanasatyaadi@gmail.com
 * Description:
 * This is a sample script of Phalcon framework that running on top of Swoole HTTP Server
 *
 * License:
 *
 * Copyright (c) 2019 Maulana Satya Adi.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the Maulana Satya Adi. The name of the
 * Maulana Satya Adi may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

use Swoole\Http\Server;
use Phalcon\Mvc\Micro;
use Phalcon\Di\FactoryDefault;

// Load factory default dependencies
$di = new FactoryDefault();

// Load application based on dependency injection
$app = new Micro($di);

// Set response while path not found
$app->notFound(function() {
  return ['not found'];
});

// Set response for path '/'. This is default response (like index.php)
$app->get('/', function() {
  return ['Hello world!'];
});

// Set the webserver IP and port
$server = new Server('0.0.0.0', 9501);

// Using HTTP2 protocol
$server->set(
  [
    'open_http2_protocol' => true
  ]);

// Set callback on start event on Swoole HTTP server
$server->on('start', function($server) use ($app) {
  // This will print on your console
  echo 'Server has started!';
});

// Set callback on request event on Swoole HTTP server
$server->on('request', function($request, $response) use ($app) {
  $response->header('Content-type', 'application/json');
  $app->header = $request->header;
  
  // Convert Swoole HTTP request to regular PHP request
  foreach ($request->server as $key => $value) {
    $_SERVER[strtoupper($key)] = $value;
  }
  $_GET           = $request->get;
  $_POST          = $request->post;
  $_COOKIE        = $request->cookie;
  $_FILES         = $request->files;
  $_GET['_url']   = $request->server['request_uri'];
  $_REQUEST       = array_merge(
    (array)$request->get,
    (array)$request->post,
    (array)$request->cookie
  );
  
  // Send response as JSON string
  $response->end(json_encode(['message' => $app->handle()]));
});

// Start Swoole HTTP server
$server->start();

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