我想写一个api来更新sql中的数据。我正在使用ci。我是这个领域的新手。虽然我已经写了，但它在localhost本身不起作用。有人能帮我吗？我在这里连接我的控制器和模型。它显示了一个错误，好像这个页面不工作

function editprofile($id,$data) {
                $this->db->where(array('user_id' => $id));
            $this->db->update('registrationdetails', $data);
                    if(!empty($id))
                    {
                        $result = true;
                    } else {
                        $result = false;
                    }
                    return $result;
                }
public function updateuser()
                {
                    $adminId = 1;
                    $AUTHENTIC_KEY = "4u0IOxa1YTwNo38QjArD9ysW6PgVnbX7vtlJ";
                    $user_id=2;
                    $firstname ="aiswarya";
                    $lastname ="mathew";
                    $email ="aiswarya@gmail.com";
                    $password ="aiswarya";
                    $confirmpassword ="aiswarya";
                    $contactnumber ="999999999";
                    $gender ="female";
                    $address ="canada"; 
                    $department ="cse";
                    $designation ="swe";
          $Admindetails = $this->common->CheckValidAdmin($adminId,$AUTHENTIC_KEY);
                    if($Admindetails != false)
                    {
                        $validAdmin = array('authentication_key' => $Admindetails->authentication_key,
                                                    'admin_id' => $Admindetails->id
                                                    );
        $data = array();
                        $data = array('firstname'=>$firstname,'lastname'=>$lastname,'email'=>$email,'password'=>$password,'confirmpassword'=>$confirmpassword,'contactnumber'=>$contactnumber,'gender'=>$gender,'address'=>$address,'department'=>$department,'designation'=>$designation);                                         
  $status = $this->user->editprofile($user_id,$data);
                                        if($status == true)
                                        {
                                            $response = array('status' => 200,
                                                              'message' => 'updated successfully',
                                                'admin_details' => $validAdmin
                                                              );

                                        } else {
                                            $response = array('status' => 404,
                                                              'message' => 'unable to add, please try again',
                                                              'admin_details' => $validAdmin);
                                        }

        } else { 
                            $response = array('status' => 404,
                                              'message' => 'Authentication Failed');
                    }
                    echo json_encode($response);

                }