Running a background task using Symfony Process without having to wait for the process to finish

Question

After a user submits a form, I want to render a view file, and right after that I want to initiate a background task to process five MS Excel files (each may have up to 2000 row

Answer 1

For using in controller:

use Symfony\Component\HttpKernel\KernelEvents;
use Symfony\Component\HttpKernel\Event\PostResponseEvent;

$myVar = new MyObject();
$this->get('event_dispatcher')->addListener(KernelEvents::TERMINATE, function(PostResponseEvent $event) use($myVar) {
    //You logic here
    $request = $event->getRequest();
    $test = $myVar->getMyStuff();
});

But it is not a good practice, please read about normal registering event listeners

kernel.terminate event will be dispatched after sending the response to user.