SmsModel::curl PHP Method

    protected function curl()
    {
        /* # set url addres */
        curl_setopt($this->curl, CURLOPT_URL, $this->url);
        curl_setopt($this->curl, CURLOPT_TIMEOUT, 5);
        curl_setopt($this->curl, CURLOPT_HEADER, false);
        curl_setopt($this->curl, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($this->curl, CURLOPT_NOBODY, true);
        curl_setopt($this->curl, CURLOPT_POST, true);
        curl_setopt($this->curl, CURLOPT_POSTFIELDS, $this->param);
        return curl_exec($this->curl);
    }