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), so I am trying to understand it.
As far as I can tell, it uses curl_setopt() to set different options like headers and such and then it uses curl_exec() to send the request.
Ideas on how to see what post fields are being sent?
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Answer
You can enable the CURLOPT_VERBOSE option:
curl_setopt($curlhandle, CURLOPT_VERBOSE, true);
When CURLOPT_VERBOSE is set, output is written to STDERR or the file specified using CURLOPT_STDERR. The output is very informative.
You can also use tcpdump or wireshark to watch the network traffic.