$recharge_details = $this->session->userdata('data');
$url = "http://api.rechapi.com/recharge.php?format=json&token=xy123r&mobile=$recharge_details['mobile']&amount=$recharge_details['mobile']&opid=$recharge_details['operator']&urid=$recharge_details['txnid']&opvalue1=#opvalue1&opvalue2=#opvalue2&opvalue3=#opvalue3";

$message  ="your recharge successful";
$message = urlencode($message);

    $ch = curl_init();

    if (!$ch) {

        die("Couldn't initialize a cURL handle");

    }
    $ret = curl_setopt($ch, CURLOPT_URL, $url);

   // curl_setopt($ch, CURLOPT_POST, 1);

    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);

    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);

   // curl_setopt($ch, CURLOPT_POSTFIELDS, "username=DEMOHYD&password=vizag@123&from=KALYNI&to=$mobile_numbers&msg=$message&type=1&dnd_check=0");

    $ret = curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

    $curlresponse = curl_exec($ch); // execute

    if (curl_errno($ch))

    //echo 'curl error : ' . curl_error($ch);

        if (empty($ret)) {

            // some kind of an error happened

            //die(curl_error($ch));

            curl_close($ch); // close cURL handler

        } else {

            //$info = curl_getinfo($ch);

            //print_r($info);

            curl_close($ch); // close cURL handler

        }