I am getting a post from Paypal but I am not sure what data is in there,
I just want to print out and email myself all of the raw post data...
$_POST returns 'array'
You marked this thread resolved already, so... does that mean you found the answer on your own?
you could also try:
file_put_contents('/path/to/some/log/file.txt', print_r($_POST, TRUE));