Description:
------------
According to the http_post_data documentation the second parameter is optional:
<code>
string http_post_data(string $url [, string $data [, array $options [, array &$info ]]])
</code>

However, when you try http_post_data('http://...'); this error is returned:
"expects at least 2 parameters, 1 given"

It would be great if the code were changed to match the documentation, in that there are times when POST-ing an empty body could be valid (requesting a "ticket" to later PUT to, etc).

Please consider the making the library match the documentation.

Thanks.