browser.php
public function post($url, $parameters = false, $content_type = false)
    {
        if (! is_object($url)) {
            $url = new SimpleUrl($url);
        }
        if ($this->getUrl()) {
            $url = $url->makeAbsolute($this->getUrl());
        }

        return $this->load($url, new SimplePostEncoding($parameters, $content_type));
    }
public function post($url, $parameters = false, $content_type = false)
    {
        if (! is_object($url)) {
            $url = new SimpleUrl($url);
        }
        if ($this->getUrl()) {
            $url = $url->makeAbsolute($this->getUrl());
        }

        return $this->load($url, new SimplePostEncoding($parameters, $content_type));
    }
Fetches the page content with a POST request.

@param string/SimpleUrl $url                Target to fetch as string.
@param hash/SimpleFormEncoding $parameters  POST parameters or request body.
@param string $content_type                 MIME Content-Type of the request body

@return string                              Content of page.