Code-igniter Date to Hijri Conversion not showing result - codeigniter

Question

I am converting current date to hijri date. Please see the link of code below which i have used in codeigniter format taken from the website in the same way but it was not showing me anything. If I have done something wrong please do let me know that also.
<?php
if (!defined('BASEPATH'))
exit('No direct script access allowed');
class HijriDate extends CI_Controller{
private $hijri;
public function __construct(){
parent::__construct();
$this->load->helper('url');
header('Access-Control-Allow-Origin: *');
header("Access-Control-Allow-Methods: GET, POST, OPTIONS");
if (isset($_SERVER['HTTP_ORIGIN'])) {
header("Access-Control-Allow-Origin: {$_SERVER['HTTP_ORIGIN']}");
header('Access-Control-Allow-Credentials: true');
//header('Access-Control-Max-Age: 86400'); // cache for 1 day
}
// Access-Control headers are received during OPTIONS requests
if ($_SERVER['REQUEST_METHOD'] == 'OPTIONS') {
if (isset($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_METHOD']))
header("Access-Control-Allow-Methods: GET, POST, OPTIONS");
if (isset($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']))
header("Access-Control-Allow-Headers: {$_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']}");
exit(0);
}
// $this->load->model('HijriDateModel','hdm');
// date_default_timezone_set('America/New_York');
}
public function index($time = false)
{
//$this->load->view('view');
if(!$time) $time = time();
$this->hijri = $this->GregorianToHijri($time);
$result=$this->hijri;
return json_encode($result);
// $this->GregorianToHijri($time = null);
}
public function get_date(){
return $this->hijri[1] . ' ' . $this->get_month_name($this->hijri[0]) . ' ' . $this->hijri[2] . 'H';
}
public function get_day(){
return $this->hijri[1];
}
public function get_month(){
return $this->hijri[0];
}
public function get_year(){
return $this->hijri[2];
}
public function get_month_name($i){
static $month = array(
"muharram", "safar", "rabiulawal", "rabiulakhir",
"jamadilawal", "jamadilakhir", "rejab", "syaaban",
"ramadhan", "syawal", "zulkaedah", "zulhijjah"
);
return $month[$i-1];
}
private function GregorianToHijri($time = null){
if ($time === null) $time = time();
$m = date('m', $time);
$d = date('d', $time);
$y = date('Y', $time);
return $this->JDToHijri(cal_to_jd(CAL_GREGORIAN, $m, $d, $y));
}
private function HijriToGregorian($m, $d, $y){
return jd_to_cal(CAL_GREGORIAN, $this->HijriToJD($m, $d, $y));
}
# Julian Day Count To Hijri
private function JDToHijri($jd){
$jd = $jd - 1948440 + 10632;
$n = (int)(($jd - 1) / 10631);
$jd = $jd - 10631 * $n + 354;
$j = ((int)((10985 - $jd) / 5316)) *
((int)(50 * $jd / 17719)) +
((int)($jd / 5670)) *
((int)(43 * $jd / 15238));
$jd = $jd - ((int)((30 - $j) / 15)) *
((int)((17719 * $j) / 50)) -
((int)($j / 16)) *
((int)((15238 * $j) / 43)) + 29;
$m = (int)(24 * $jd / 709);
$d = $jd - (int)(709 * $m / 24);
$y = 30*$n + $j - 30;
return array($m, $d, $y);
}
# Hijri To Julian Day Count
private function HijriToJD($m, $d, $y){
return (int)((11 * $y + 3) / 30) +
354 * $y + 30 * $m -
(int)(($m - 1) / 2) + $d + 1948440 - 385;
}
}// end class Hijri Page
?>
Code Details: I have made controller class in codeigniter and want only today's date in Hijri like this in json format,
{"hijridate":"18 Jumada al-Ukhra 1440"}
However it is not showing as desired. Please help me. I am not expert in codeigniter :(