Problem with Session on Codeigniter after putting website into new hosting

Question

I have the following problem: when trying to accomplish the logon in some browsers or even on mobile phone (it does not occur at all, my friend for example can log in normally), the session simply is not started and the person remains unattended.

No error code return. I have changed the session settings for CodeIgniter to save to database, save to folder, and nothing solves.

I would like the help of CodeIgniter, because I have tested several things. I leave here some of my settings, to help:

config.php

$config['sess_driver'] = 'files';
$config['sess_cookie_name'] = 'ci_session';
$config['sess_expiration'] = 7200;
$config['sess_save_path'] = NULL;
$config['sess_match_ip'] = FALSE;
$config['sess_time_to_update'] = 300;
$config['sess_regenerate_destroy'] = FALSE;

After typing the form

Send what he typed in the 2 fields and send to the controller, in the controller I get them like this:

$user = $this->input->post('user');
$senha = md5($this->input->post('senha'));

And send to model Login

$result = $this->login->entrar($user, $senha);

In the model:

public function entrar($user, $senha){
        return $this->db->query('select *
                                 from usuario
                                 where (usuario = ? or email = ?)
                                 and senha = ?',array($user, $user, $senha))->row();
    }

If the return variable is not empty (get output with select) I save the session that is already started in Codeigniter autoload

$autoload['libraries'] = array('session', 'database');

How I record the session: ($result is the variable that comes back with user data)

$this->session->set_userdata('id', $result->id);
$this->session->set_userdata('nome_completo', $result->nome_completo);
$this->session->set_userdata('email', $result->email);
$this->session->set_userdata('usuario', $result->usuario);
$this->session->set_userdata('senha', $result->senha);

After that When I give the following command after saving the session

print_r($this->session->userdata());

I get the session saved correctly, but after reloading the page to refresh the user data on the screen the session is not set, and the print_r result is

array{}

OBS: Before my website was at the following address: http://meulivro-teste.000webhostapp.com, now I bought a package of accommodation at Hostinger, and it is on the site: http://www.conteumahistoria.com.

Additional The PHP version was in 7.3 on Hostinger, I went back to 7.1 to see if it fixed, but nothing changed

Answer 1

Solved as follows: (I will answer my own question in case someone comes to have the same problem can try to solve the same way I solved)

In the application/config/config.php folder

1 - Removing "_" from cookie name, errors may occur in some browsers

$config[‘sess_cookie_name’] = ‘ci_session’;

// Mude para:
$config[‘sess_cookie_name’] = ‘cisession’;

2 - Also change the cookie part

$config['cookie_prefix'] = "";
$config['cookie_domain'] = ($_SERVER['SERVER_NAME'] == 'localhost' ? '' : preg_replace('/^www\./', '', $_SERVER['SERVER_NAME']));
$config['cookie_path'] = BASE_URI;

3 - Change the following setting

$config['base_url'] = BASE_URL;

Now let’s change the constants.php file inside the config folder

At the end of the file, add the following code

// Base URL (keeps this crazy sh*t out of the config.php
if (isset($_SERVER['HTTP_HOST']))
{
$base_url  = isset($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) == 'on' ? 
'https' : 'http';
$base_url .= '://'. $_SERVER['HTTP_HOST'];
$base_url .= str_replace(basename($_SERVER['SCRIPT_NAME']), '', 
$_SERVER['SCRIPT_NAME']);

// Base URI (It's different to base URL!)
$base_uri = parse_url($base_url, PHP_URL_PATH);

if (substr($base_uri, 0, 1) != '/')
{
    $base_uri = '/'.$base_uri;
}

if (substr($base_uri, -1, 1) != '/')
{
    $base_uri .= '/';
}
 }

else
{
 $base_url = 'http://localhost/';
 $base_uri = '/';
}

 // Define these values to be used later on
 define('BASE_URL', $base_url);
 define('BASE_URI', $base_uri);
 define('APPPATH_URI', BASE_URI.APPPATH);

 // We dont need these variables any more
  unset($base_uri, $base_url);

CREDITS TO https://forum.codeigniter.com/thread-37828.html