Manage date as UTC

PHP Code:

$this->db->query('SET time_zone = "00:00"'); 


I've no chance to check it. I've some problem to retrieve database data.
Config/database.php seems ok with my db data information.

I've in controller Homepage.php:

PHP Code:

    public function index()
    {
        $this->load->model('auth');
        $data['results'] = $this->auth->example();
        $this->load->view('homepage', $data);
    } 


Model Auth.php:

PHP Code:

function example()
    {
        $query = $this->db->query("SELECT * FROM tablename WHERE user_id = 1 LIMIT 1");
        if($query->num_rows == 0) { return false; }
        else { return $query->result(); }
    } 


View homepage.php:

PHP Code:

print_r($results); 


Database library load in config/autoload.php:

PHP Code:

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


Page load give me blank page.. No errors, nothing. How can I check if database connection work fine?


About initial problem, I want try before by myself to find solution to implement the suggested command in all queries, but at all, now I can't try.

Thanks!