如何设置json Header - Guzzle - How to set json Header?

似乎没有为请求标头设置Accept: application/json。我没有得到json响应。

$params = [
    'client_id'     => 'xxxx',
    'client_secret' => 'xxxxxxxxxx',
    'code'          => $request->get('code'),
    'state'         => $request->get('state'),
];
$client = new Client(['headers' => ['Accept: application/json']]);
$response = $client->post($tokenUrl, [
    'form_params' => $params,
]);
echo $response->getBody();

如何解决这个问题?

根据http://docs.guzzlephp.org/en/latest/request-options.html，您应该将标题写成一个关联数组。

$client = new Client(['headers' => ['Accept' => 'application/json']]);