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php - Check if the file in the response has the header Content-Type: application/json

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Hello everyone i'm trying to figure out how to check the response has a header that i expect.

I have a json file that i'm returing and the response header should be application/json

How is this done best in symfony ?

       $file = __DIR__ . '/../../' . '/myjson/jsonfile.json' ;

    $json = json_decode(file_get_contents($file));
    

    return new JsonResponse(
        $json,
        Response::HTTP_OK
    );
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I have tried setting the header forcefully, but it does not accomplish what i want

$response->headers->set('Content-Type', 'text/plain');
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Undefined asked

2021-12-1

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2021-12-1

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About the technologies asked in this question

PHP

PHP (from the English Hypertext Preprocessor - hypertext preprocessor) is a scripting programming language for developing web applications. Supported by most hosting providers, it is one of the most popular tools for creating dynamic websites. The PHP scripting language has gained wide popularity due to its processing speed, simplicity, cross-platform, functionality and distribution of source codes under its own license.
https://www.php.net/

Symfony

Symfony compares favorably with other PHP frameworks in terms of reliability and maturity. This framework appeared a long time ago, in 2005, that is, it has existed much longer than most of the other tools we are considering. It is popular for its web standards compliance and PHP design patterns.
https://symfony.com/