Twig to respond with 204 status code

[NotionCommotion]

PHP should return only status code 204 if the request was successful, else status code 422 along with a description of the error if an error occurred.

 

Firebug has been displaying error XML Parsing Error: no root element found when it receives a 204 status code.

 

I finally tracked it down to the following.  It appears that if $rs is [null,204], I am telling slim to return JSON, however, 204 should not have any content.

 

How should the below script be modified to prevent these errors?

<?php
require __DIR__.'/../vendor/autoload.php';

$app = new \Slim\App();

$app->get('/{name}', function (\Psr\Http\Message\ServerRequestInterface $request, \Psr\Http\Message\ResponseInterface $response) {
    $rs=($request->getAttribute('name')=='error')?["error message",422]:[null,204];
    return $response->withJson($rs[0],$rs[1]);
});

$app->run();

[Jacques1]

Don't respond with a JSON document when you want an empty body.

[NotionCommotion]

Don't respond with a JSON document when you want an empty body.

 

Can I do so when using twig?  I tried the following but no change.

return $rsp[1]==204?$response->withStatus($rsp[1],'whatever'):$response->withJson($rsp[0],$rsp[1]);