CORS Api with symfony

I advise you to use NelmioCorsBundle:

https://github.com/nelmio/NelmioCorsBundle

This bundle allows you to send Cross-Origin Resource Sharing headers with ACL-style per-URL configuration.

Is very useful for CORS problem

I used Symfony 5 and Wordpress this code in the file public/index.php works perfectly.

header('Access-Control-Allow-Origin: *');header("Access-Control-Allow-Headers: X-API-KEY, Origin, X-Requested-With, Content-Type, Accept, Access-Control-Request-Method");header("Access-Control-Allow-Methods: GET, POST, OPTIONS, PUT, DELETE");header("Allow: GET, POST, OPTIONS, PUT, DELETE");$method = $_SERVER['REQUEST_METHOD'];if ($method == "OPTIONS") {    die();}

Also, I remove package cors .. This Bundle doesn't work for me

I'm not sure that's the right way, but I resolved for me:

1. Create new event subscriber (like ResponseSubscriber)
2. Listen KernelEvents::RESPONSE event
3. In your handler add the following:

if ($event->getRequest()->getMethod() === 'OPTIONS') {    $event->setResponse(            new Response('', 204, [                'Access-Control-Allow-Origin' => '*',                'Access-Control-Allow-Credentials' => 'true',                'Access-Control-Allow-Methods' => 'GET, POST, PUT, DELETE, OPTIONS',                'Access-Control-Allow-Headers' => 'DNT, X-User-Token, Keep-Alive, User-Agent, X-Requested-With, If-Modified-Since, Cache-Control, Content-Type',                'Access-Control-Max-Age' => 1728000,                'Content-Type' => 'text/plain charset=UTF-8',                'Content-Length' => 0            ])        );    return ;}