CURLOPT_STDERR must be set to something specific.
curl_setopt($c, CURLOPT_STDERR, fopen('/curl.txt', 'w+')); fixed my issue.
As it turns out
curl_setopt($c, CURLOPT_VERBOSE, 1); is not printing the output to STDERR for some reason which I have not uncovered. I did not find the output in any of my PHP, Apache, nor Event Viewer logs.
curl_setopt($c, CURLOPT_STDERR, fopen('/curl.txt', 'w+'));, I was able to see the output in the
I am not sure if this is specific to Windows environments.