Using a very basic PHP/CodeIgniter script, I've set up a simple webhook for testing purposes, but whenever the hook is called, no $_POST data is set at all. The global $_POST array is completely empty. I know this because I've set up a check that basically goes like this:

if(count($_POST) === 0)
{
    $message = "No POST data";
}
else
{
    foreach($_POST as $k => $v)  //.. compile a message
}

The $message always gets set to No POST data.

Am I missing something about webhooks or am I completely doing this wrong?

I would really appreciate any help at all. Thanks in advance.