PHP - Debugging Curl

Question

I\'d like to see what the post fields in the request are before I send it. (For debugging purposes).

The PHP library (class) I am using is already made (not by me),

Answer 1

Here is an even simplier way, by writing directly to php error output

curl_setopt($curl, CURLOPT_VERBOSE, true);
curl_setopt($curl, CURLOPT_STDERR, fopen('php://stderr', 'w'));