In what format should data be sent to the API server?

Question

API

You can send a POST request with an array of data in the usual format

$post = [];
curl_setopt($ch, CURLOPT_POSTFIELDS, $post);

Or in JSON format

curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($post));
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json'));

Question: in what format is it accepted and better to transfer data to the server?
And is there any point in passing in json?

Answer 1

And so, and so normal. Well, in JSON it's somehow more feng shui, or something.