codeigniter/php error undefine property in private function - php

Question

I test new self(), $this both work fine but I want to know:
What difference between them will it cause a problem to me later when
using in difference situation?
Sencond how to get variable in private function load_user_record($rows)
I got error undefine property please help
private function load_user_record($rows)
{
$this->user_id = $rows->id;
$this->hashedPassword = $rows->user_pwd;
}
private function find_user_record($user_name)
{
$this->db->where('user_name',$user_name);
$query = $this->db->get('tbl_user');
$result = $query->result();
if( $query->num_rows() > 0 )
{
foreach($result as $rows):
/************************* what difference ******************************/
/*
* $item = new self();
* $item->load_user_record($rows);
* $user_result[] = $item;
*/
$this->load_user_record($rows);
$user_result[] = $this;
/************************* End HERE ******************************/
endforeach;
return $user_result;
}
return FALSE;
}
public function check_user_exist($user_name, $password)
{
$find_user = $this->find_user_record($user_name);
if($find_user !== FALSE)
{
/********************* HERE error undefine property*********************/
foreach($find_user as $user):
/* $user_id = $user->user_id;
* $hashed_password = $user->hashed_password;
* using this 2 variable above work
*/
$this->load_user_record($user);
// using this load_user_record not work
endforeach;
/************************* End HERE ******************************/
if( password_verify( $password, $hashedPassword )) {
if (password_needs_rehash($hashedPassword, PASSWORD_DEFAULT)) {
$time = date("Y-m-d H:i:s");
$newHashedPassword = password_hash($password, PASSWORD_DEFAULT);
$this->db->where('id',$user_id)
->set(array(
'user_pwd' => $newHashedPassword,
'last_login' => $time
));
if(!$this->db->update('tbl_user'))
return FALSE;
}
return TRUE;
}
return FALSE;
}
return FALSE;
}
Error happen
A PHP Error was encountered
Severity: Notice
Message: Undefined property: Login::$id
Filename: core/Model.php
Line Number: 77
Backtrace:
File:
C:\wamp\www\CodeIgniter_Project\application\models\backend\Login_model.php
Line: 10 Function: __get
File:
C:\wamp\www\CodeIgniter_Project\application\models\backend\Login_model.php
Line: 49 Function: load_user_record
File:
C:\wamp\www\CodeIgniter_Project\application\controllers\backend\Login.php
Line: 27 Function: check_user_exist
File: C:\wamp\www\CodeIgniter_Project\index.php Line: 316 Function:
require_once
A PHP Error was encountered
Severity: Notice
Message: Undefined property: Login::$user_pwd
Filename: core/Model.php
Line Number: 77
Backtrace:
File:
C:\wamp\www\CodeIgniter_Project\application\models\backend\Login_model.php
Line: 11 Function: __get
File:
C:\wamp\www\CodeIgniter_Project\application\models\backend\Login_model.php
Line: 49 Function: load_user_record
File:
C:\wamp\www\CodeIgniter_Project\application\controllers\backend\Login.php
Line: 27 Function: check_user_exist
File: C:\wamp\www\CodeIgniter_Project\index.php Line: 316 Function:
require_once
A PHP Error was encountered
Severity: Notice
Message: Undefined variable: hashedPassword
Filename: backend/Login_model.php
Line Number: 53
Backtrace:
File:
C:\wamp\www\CodeIgniter_Project\application\models\backend\Login_model.php
Line: 53 Function: _error_handler
File:
C:\wamp\www\CodeIgniter_Project\application\controllers\backend\Login.php
Line: 27 Function: check_user_exist
File: C:\wamp\www\CodeIgniter_Project\index.php Line: 316 Function:
require_once
and is my code right in OOP? Don't mind me if I'm wrong in OOP it my 1st code in OOP.

Answer 1

In the loop you used the same variable $find_user. Change the code to:
foreach($find_user as $user):
$this->load_user_record($user);
endforeach;