curd operations api

<?php
// header("Access-Control-Allow-Methods: GET, OPTIONS");
// header("Access-Control-Allow-Headers: Content-Type, Content-Length, Accept-Encoding");
// defined('BASEPATH') OR exit('No direct script access allowed');


class Welcome extends CI_Controller {
public function __construct($config = 'rest')
    {
        parent::__construct($config);

        header('Access-Control-Allow-Origin: *');
        header("Access-Control-Allow-Headers: X-API-KEY, Origin, X-Requested-With, Content-Type, Accept, Access-Control-Request-Method, Authorization");
        header("Access-Control-Allow-Methods: GET, POST, OPTIONS, PUT, DELETE");
        $method = $_SERVER['REQUEST_METHOD'];
        if ($method == "OPTIONS") {
            die();
        }
    }
// public function __construct($config = 'rest')
// {
//     header('Access-Control-Allow-Origin: *');
//     header("Access-Control-Allow-Methods: GET, POST, OPTIONS, PUT, DELETE");
//     parent::__construct();
// }
//public function __construct()
// {
// header(‘Access-Control-Allow-Origin: *’);
// header(“Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept, Access-Control-Request-Method”);
// header(“Access-Control-Allow-Methods: GET, POST, OPTIONS, PUT, DELETE”);
// $method = $_SERVER[‘REQUEST_METHOD’];
// }
/**
* Index Page for this controller.
*
* Maps to the following URL
* http://example.com/index.php/welcome
* - or -
* http://example.com/index.php/welcome/index
* - or -
* Since this controller is set as the default controller in
* config/routes.php, it's displayed at http://example.com/
*
* So any other public methods not prefixed with an underscore will
* map to /index.php/welcome/<method_name>
* @see https://codeigniter.com/user_guide/general/urls.html
*/
public function index()
{
//           $users=  $this->db->get('ng_curd')->result();
           $jsonResponse = json_encode($this->db->get('ng_curd')->result());
echo $jsonResponse;
}
        public function home(){
$json = json_decode(file_get_contents('php://input'), TRUE);
// $json = json_decode($json, true);
$name= $json['name'];
$mobile = $json['mobile'];
$email = $json['email'];
$password = $json['password'];
$dob = $json['dob'];
 $this->db->insert('form', array('name'=>$name,
 'mobile'=>$mobile,
 'email'=>$email,
 'password'=>md5($password),
 'dob'=>$dob
));// echo 'ffdddsadffad';
// $request= json_decode(file_get_contents('php://input'), TRUE);
//  foreach($request as $req){
// // echo $req[2];
// //  print_r($req); echo '<br>';
// // echo $this->input->post($req['name']);
// echo $req['name'];
// echo $json['name'];
                // echo $data->name; echo "<br/>";
//  }
//  $username = http.post('name');
// echo $username;

//  echo  $this->input->post('mobile');
//   echo  $this->input->post('email');
// echo $username;

//            $this->db->insert('demo', array('name'=>'name'));
        // echo 'success';
}
                public function delete_row($id){

$this->db->where('curd_id', $id)->delete('ng_curd');

}
               
public function getWeb(){ // showing all the db records in frond end

$jsonResponse = json_encode($this->db->get('form')->result());
echo $jsonResponse;
}

public function edit_row($id){
$res = $this->db->where('user_id', $id)->get('form')->row();
        echo json_encode($res);
//  echo $id;
}
                 public function getrow($id){
              $res =   $this->db->where('curd_id', $id)->get('ng_curd')->row(); 
                 echo json_encode($res);   
                }
public function updaterow(){
$json = json_decode(file_get_contents('php://input'), TRUE);
// $json = json_decode($json, true);
$id= $json['id'];
$name= $json['name'];
$mobile = $json['mobile'];
$email = $json['email'];
$dob = $json['dob'];
$this->db->where('user_id', $id)->update('form', array('name'=>$name, 'mobile'=>$mobile,
'email'=>$email,
'dob'=>$dob));

}
public function createUser(){
$json = json_decode(file_get_contents('php://input'), TRUE);
                                  $fname = $json['firstName'];
                                  $lname = $json['lastName'];
                                  $email = $json['email'];
                                $data=   array('fname'=>$fname,
                                                'lname'=>$lname,
                                                 'email'=>$email);
                                 $this->db->insert('ng_curd', $data);
    }
public function updateUser(){
               $json = json_decode(file_get_contents('php://input'), TRUE);
                                  $id= $json['curd_id'];
                                  $fname = $json['fname'];
                                  $lname = $json['lname'];
                                  $email = $json['email'];
                               
                                $data=   array('fname'=>$fname,
                                                'lname'=>$lname,
                                                 'email'=>$email);
                                 $this->db->where('curd_id', $id)->update('ng_curd', $data);

}
}