converting database result into array in codeigniter - php

Question

I am new to codeigniter and I am trying to make a login authentication system with the role of admin, moderator, and user.
My problem is that I am trying to set a condition on 'role' which is a column in database. But I don't know how to use and compare the value of column role.
I wrote the following code but I am getting error:
[Severity: Error Message: Call to a member function result_array() on array]
My code is:
<?php
// step no 4 create a new controller where form post after submission.
class verify extends CI_Controller{
function __construct(){
parent::__construct();
$this->load->helper('url');
$this->load->model('user');
}
function login(){
//step no 5 create a new method in verify controller
$username = $this->input->post('username');
$userpass = $this->input->post('password');
//step 9 take value back in answer variable from model and print message
$answer = $this->user->usergetdata($username,$userpass,'admin');
$data = $answer->result_array();
if($answer){
if($data[0]['role']=='admin'){
redirect('admin_page');
}
}else
{
echo "username or Password is wrong";
}
}
}
?>
<!-- begin snippet: js hide: false console: true babel: false -->

Answer 1

In model
$res = $this->db->get();
return $res->result_array();
then apply
foreach($answer as $a)
{
var_dump( $a );
}
use $a to get values

Answer 2

$data = json_decode(json_encode($answer),true);
print_r($data);
used this your result convert in array format

Answer 3

You are calling the ->result() in you model and then trying to call the result array from the controller.
Either remove the ->result(); from the return $query->result(); in the model or remove the ->result_array() from the controller.
Once you have called the script and used ->get() you can only call one of the results at a time. If you are likely to want to call different result parameters such as ->result() and ->num_rows on the same query result then just return the query to the controller and use ->result() in the controller.
Hope this helps clear things up a little.
MODEL
class user extends CI_Model
{
function __construct()
{
parent::__construct();
}
function usergetdata( $username,$userpass,$role )
{
$this->db->select();
$this->db->from( 'user' );
$this->db->where( 'username',$username );
$this->db->where( 'userpass',$userpass );
$query= $this->db->get();
if( $query->num_rows() == 1 )
{
return $query;
}
else
{
return false;
}
}
}
CONTROLLER
$answer = $this->user->usergetdata( $username,$userpass,'admin' );
$data = $answer->result_array();