Run an asynchronous PHP task using Symfony Process - windows

Question

For time-consuming tasks (email sending, image manipulation… you get the point), I want to run asynchronous PHP tasks.
It is quite easy on Linux, but I'm looking for a method that works on Windows too.
I want it to be simple, as it should be. No artillery, no SQL queueing, no again and again installing stuff… I just want to run a goddamn asynchronous task.
So I tried the Symfony Process Component.
Problem is, running the task synchronously works fine, but when running it asynchronously it exits along the main script.
Is there a way to fix this?
composer require symfony/process
index.php
<?php
require './bootstrap.php';
$logFile = './log.txt';
file_put_contents($logFile, '');
append($logFile, 'script (A) : '.timestamp());
$process = new Process('php subscript.php');
$process->start(); // async, subscript exits prematurely…
//$process->run(); // sync, works fine
append($logFile, 'script (B) : '.timestamp());
subscript.php
<?php
require './bootstrap.php';
$logFile = './log.txt';
//ignore_user_abort(true); // doesn't solve issue…
append($logFile, 'subscript (A) : '.timestamp());
sleep(2);
append($logFile, 'subscript (B) : '.timestamp());
bootstrap.php
<?php
require './vendor/autoload.php';
class_alias('Symfony\Component\Process\Process', 'Process');
function append($file, $content) {
file_put_contents($file, $content."\n", FILE_APPEND);
}
function timestamp() {
list($usec, $sec) = explode(' ', microtime());
return date('H:i:s', $sec) . ' ' . sprintf('%03d', floor($usec * 1000));
}
result
script (A) : 02:36:10 491
script (B) : 02:36:10 511
subscript (A) : 02:36:10 581
// subscript (B) is missing

Answer 1

Main script must be waiting when async process will be completed. Try this code:
$process = new Process('php subscript.php');
$process->start();
do {
$process->checkTimeout();
} while ($process->isRunning() && (sleep(1) !== false));
if (!$process->isSuccessful()) {
throw new \Exception($process->getErrorOutput());
}

Answer 2

If php supports fpm for Windows, you can listen to kernel.terminate event to provide all expensive tasks after response has been sent.
Service:
app.some_listener:
class: SomeBundle\EventListener\SomeListener
tags:
- { name: kernel.event_listener, event: kernel.terminate, method: onKernelTerminate }
Listener:
<?php
namespace SomeBundle\EventListener;
use Symfony\Component\HttpKernel\Event\PostResponseEvent;
class SomeListener
{
public function onKernelTerminate(PostResponseEvent $event)
{
// provide time consuming tasks here
}
}

Answer 3

Not the best solution, but:
$process = new Process('nohup php subscript.php &');
$process->start();