/**
* Fetches a page by POST into the page buffer.
* If there is no base for the URL then the
* current base URL is used. After the fetch
* the base URL reflects the new location.
* @param string $url URL to fetch.
* @param mixed $parameters Optional POST parameters or content body to send
* @param string $content_type Content type of provided body
* @return boolean/string Raw page on success.
* @access public
*/
function post($url, $parameters = false, $content_type = false)
{
$this->fix_protected_zone($url);
return parent::post($url, $parameters, $content_type);
}