cekout controller

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class Checkout extends CI_Controller {

	function __construct()
	{
		parent::__construct();
		$this->load->library(array('template', 'cart'));
		$this->load->model('app_home');
		$this->load->library('form_validation');
	}

	public function index()
	{
		$this->template->alfatihmart("checkout");
	}

	public function city()
	{

		$prov = $this->input->post('prov', TRUE);
		$curl = curl_init();

		curl_setopt_array($curl, array(
		  CURLOPT_URL => "http://api.rajaongkir.com/starter/city?province=$prov",
		  CURLOPT_RETURNTRANSFER => true,
		  CURLOPT_ENCODING => "",
		  CURLOPT_MAXREDIRS => 10,
		  CURLOPT_TIMEOUT => 30,
		  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
		  CURLOPT_CUSTOMREQUEST => "GET",
		  CURLOPT_HTTPHEADER => array(
		    "key: b03354ea01da154f19e1d300a9497a16"
		  ),
		));

		$response = curl_exec($curl);
		$err = curl_error($curl);

		curl_close($curl);

		if ($err) {
		  echo "cURL Error #:" . $err;
		} else {
		   $data = json_decode($response, TRUE);

		   echo '<option value="" selected disabled>kota / kabupaten</option>';

  		for ($i=0; $i < count($data['rajaongkir']['results']); $i++) {
    	echo '<option value="' .$data['rajaongkir']['results'][$i]['city_id'].','.$data['rajaongkir']['results'][$i]['city_name'].'">'.$data['rajaongkir']['results'][$i]['city_name'].'</option>';
  			}
		}
	}

	public function getcost()
	{
		$asal = 445;
		$dest = $this->input->post('dest', TRUE);
		$kurir = $this->input->post('kurir', TRUE);
		$berat = 0;

		foreach ($this->cart->contents() as $key) {
			$berat += ($key['weight'] * $key['qty']);
		}
		$curl = curl_init();

		curl_setopt_array($curl, array(
		  CURLOPT_URL => "http://api.rajaongkir.com/starter/cost",
		  CURLOPT_RETURNTRANSFER => true,
		  CURLOPT_ENCODING => "",
		  CURLOPT_MAXREDIRS => 10,
		  CURLOPT_TIMEOUT => 30,
		  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
		  CURLOPT_CUSTOMREQUEST => "POST",
		  CURLOPT_POSTFIELDS => "origin=$asal&destination=$dest&weight=$berat&courier=$kurir",
		  CURLOPT_HTTPHEADER => array(
		    "content-type: application/x-www-form-urlencoded",
		    "key: b03354ea01da154f19e1d300a9497a16"
		  ),
		));

		$response = curl_exec($curl);
		$err = curl_error($curl);

		curl_close($curl);

		if ($err) {
		  echo "cURL Error #:" . $err;
		} else {
		  $data = json_decode($response, TRUE);

		  echo '<option value="" selected disabled>Layanan yang Tersedia</option>';

		  for ($i=0; $i < count($data['rajaongkir']['results']); $i++) {


		  	for ($l=0; $l < count($data['rajaongkir']['results'][$i]['costs']); $l++) {

		echo
			'<option value="'.$data['rajaongkir']['results'][$i]['costs'][$l][0]['cost']['value'].','.$data['rajaongkir']['results'][$i]['costs'][$l]['service'].'('.$data['rajaongkir']['results'][$i]['costs'][$l]['description'].')">';
		  		echo $data['rajaongkir']['results'][$i]['costs'][$l]['service'].'('.$data['rajaongkir']['results'][$i]['costs'][$l]['description'].')</option>';

		  	}
		  }
		}
	}
}