带有json响应的PHP Http Post请求：没有有效的json

Question

If I send the following request to an API, it says, that I use no valid JSON string. How can I transform my JSON in a valid PHP post request? I'm using guzzle:

$client = new Client();
$res = $client->request('POST', 'https://fghfgh', [
    'auth' => ['user', 'pw']
]);
$res->getStatusCode();
$res->getHeader('application/json');


$res->getBody('{
     "category": "ETW",
     "date": "2017-03-02",
     "address": {
         "nation": "DE",
         "street": "abc",
         "house_number": "7",
         "zip": "80637",
         "town": "München"
     },
     "construction_year": "1932",
     "living_area": "117.90",
     "elevator": false,
     "garages": false
}');

Answer 1

as mentioned in the documentation

you need to pass the required headers to your response object as follows:

$res = $client->request('POST', 'https://fghfgh', [
    'auth' => ['user', 'pw'],
    'headers' => [
        'Content-Type' => 'application/json',
        'Accept' => 'application/json',
    ]
]);