PHP cURL - json请求的模式不正确

Question

I'm trying to implement following cURL request in php:

curl -X POST \
-H "Content-Type: application/json" \
-H "Authorization: login:password" \
-d '{"phone": "[phone]", "msg": "Great app! Thank you!"}' \
https://some.endpoint.url

It works fine in console, I also managed to use this request in tools like postman/insomnia.

But when I try to implement it in PHP like that:

    $fields = [
        'phone' => $number,
        'msg'   => $msg,
    ];

    $data = json_encode($fields);

    $headers = [
        'Content-Type: application/json',
        'Authorization: login:password'
    ];

    $ch = curl_init($url);

    curl_setopt($ch,CURLOPT_POST, 1);                                                    
    curl_setopt($ch,CURLOPT_POSTFIELDS, $data);
    curl_setopt($ch,CURLOPT_HTTPHEADER, $headers);

    curl_setopt($ch, CURLOPT_URL, config('kajaki.sms_url'));
    curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);


    $response = curl_exec($ch);

    curl_close($ch);

I get 400: Incorrect schema which AFAIK indicates, that the request is not being sent as valid JSON request.

What is wrong? How can I send this request correctly as a JSON?

Unfortunately this API does not provide any documentation.

Answer 1

I've had a similar problem before, I don't know if it will work for you but you can try addslashes() like this:

$fields = [
    'phone' => "[phone]",
    'msg'   => "Great app! Thank you!",
];

$data = addslashes(json_encode($fields)); 
// outputs {\"phone\":\"[phone]\",\"msg\":\"Great app! Thank you!\"}