CI - show me what went wrong [duplicate] - php

Question

This question already has answers here:
CI - show database error or fail
(2 answers)
Closed 9 years ago.
I've developed a simple login system which works OK but fails, and I need to know why.
QUESTION: How to show what is causing the fail?
Here's the database function:
function login($email,$password)
{
$this->db->where("email",$email);
$this->db->where("password",$password);
$query=$this->db->get("users");
if($query->num_rows()>0)
{
foreach($query->result() as $rows)
{
//add all data to session
$newdata = array(
'user_id' => $rows->id,
'user_name' => $rows->username,
'user_email' => $rows->email,
'logged_in' => TRUE,
);
}
$this->session->set_userdata($newdata);
return true;
}
return false;
}
And here's the logic:
public function login()
{
$this->load->library('form_validation');
// field name, error message, validation rules
$this->form_validation->set_rules('email', 'Your Email', 'trim|required|valid_email');
$this->form_validation->set_rules('password', 'Password', 'trim|required|min_length[4]|max_length[32]');
if($this->form_validation->run() == FALSE)
{
$this->signin();
}
else
{
$email=$this->input->post('email');
$password=md5($this->input->post('pass'));
$result=$this->user_model->login($email,$password);
if($result)
{
$this->dash();
}
else
{
$data['title']= 'Login Error';
$this->load->view('nav/header', $data);
$this->load->view('login', $data);
$this->load->view('nav/footer', $data);
}
}
}
I know the error is happening as I redirect back to the login page if it fails and change the title text to show me (only in testing mode for right now). But how can I find out what is going wrong?
This is the check database function:
function login($email,$password)
{
$this->db->where("email",$email);
$this->db->where("password",$password);
$query=$this->db->get("users");
if($query->num_rows()>0)
{
foreach($query->result() as $rows)
{
//add all data to session
$newdata = array(
'user_id' => $rows->id,
'user_name' => $rows->username,
'user_email' => $rows->email,
'logged_in' => TRUE,
);
}
$this->session->set_userdata($newdata);
return true;
}
return false;
}

Answer 1

I assume all your php code is fine, then what you need is set custom form-validation-message for each input to know which input went wrong and echo them:
<?php echo validation_errors(); ?>

Answer 2

write below code in your view file
<section id="notification" >
<?php
if(validation_errors() !== '' ) {
echo "<div class='alert-msg error'>";
echo validation_errors();
echo "</div>";
}
$error = $this->session->flashdata('error');
$success = $this->session->flashdata('success');
if($error)
{
echo "<div class='alert-msg error'>";
echo $this->session->flashdata('error');
echo "</div>";
}
if($success)
{
echo "<div class='alert-msg success'>";
echo $this->session->flashdata('success');
echo "</div>";
}
?>
</section>
and set success/error message conditionally in flash data in controller ( see below)
if($result) {
    $this->dash();
$this->session->set_flashdata('success', 'Login successfully.');
 } else {
     $this->session->set_flashdata('error', 'Login failed');
}
Read more Flashdata in CI

Answer 3

For your changed answer:
use below logic in your model
$qry = $this->db->get_where('users', array('username' => $this->_username ));
if ($qry->num_rows() == 1) {
$user = $qry->row_array();
$submitted_pass = md5($this->_password);
$db_pass = $user['password'];
if ($submitted_pass === $db_pass) {
return $user;
} else {
// wrong username/password
$this->session->set_flashdata('error', $this->errorList[10]);
return FALSE;
}
} else {
// no such username exist
$this->session->set_flashdata('error', $this->errorList[15]);
return FALSE;
}