public function fetchIntoFile ($url, $fp, $ip = null, $timeout = 5)
	{
		// set url to post to
		curl_setopt($this->ch, CURLOPT_URL, $url);

		//set method to get
		curl_setopt($this->ch, CURLOPT_HTTPGET, true);

		// store data into file rather than displaying it
		curl_setopt($this->ch, CURLOPT_FILE, $fp);

		//bind to specific ip address if it is sent trough arguments
		if ($ip)
		{
			curl_setopt($this->ch, CURLOPT_INTERFACE, $ip);
		}

		//set curl function timeout to $timeout
		curl_setopt($this->ch, CURLOPT_TIMEOUT, $timeout);

		//and finally send curl request
		curl_exec($this->ch);

		if ($this->hasError())
		{
			return false;
		}

		return true;
	}