Route – Return empty array

The CMS Questions
1

I have the following route:

    [
      'pattern' => '1234',
      'action' => function() {
        $cacheFile = '/lineups/testing.json';

        if (F::exists($cacheFile)) {
          return Json::decode(F::read($cacheFile));
        } 

        return [];
      }
    ]

and I want to return an empty array, if the file dosen’t exist. But somehow I get a 404 error and it shows the error page.
Also an empty string return a 404. But as soon as I return an array with at least 1 item or a string which is not empty, it works as expected.

I’m not sure if this is by design or if its a bug?

{
  "info": {
    "kirby": "4.3.0",
    "php": "8.2.10",
    "server": "nginx/1.25.2",
    "license": "Unregistered",
    "languages": []
  }
}

(I don’t know why it shows php82. I’m using herd with only php8.3 installed.)

2

It is by design. We do an empty() check in PHP and both your described returns would be caught in this check:

3

You can return

			    return new Response('{}', 'application/json', 200);//json_decode($json);