Well for starters,
 echo $sRequest; is a de-bug request, not sure what your going for fully here since you use Hungarian Notion.

Then $execResult = curl_exec($ch); is right out of the PHP Docs so you may wanna fit that to what your looking for more.

That should get you ahead a decent amount!

BTC - 3Bt5TVKGGdJqUFSBrLf5WyckavmPRUc5hT

EDIT - I guess I wont get my BTC