Codeigniter无法连接到DB

Question

Alright so for some reason no matter what I do CI is refusing to connect to database. I've tried using another DB and so on and nothing happens

This is what I've ended up using as alternative way to connect to DB since default wont work either.

class ContentLoader extends CI_Model {
    public function __construct() {
        $this->load->database(); 
    }

    public function foo() {
        $res = $this->load->database();

        if($res == false) {
            echo "conn_failed";
        }
    }
}

And this is my config

$active_group = 'default';
$query_builder = TRUE;

$db['default'] = array(
    'dsn'   => '',
    'hostname' => 'localhost',
    'username' => 'root',
    'password' => '',
    'database' => 'first_igniter',
    'dbdriver' => 'mysqli',
    'dbprefix' => '',
    'pconnect' => FALSE,
    'db_debug' => (ENVIRONMENT !== 'production'),
    'cache_on' => FALSE,
    'cachedir' => '',
    'char_set' => 'utf8',
    'dbcollat' => 'utf8_general_ci',
    'swap_pre' => '',
    'encrypt' => FALSE,
    'compress' => FALSE,
    'stricton' => FALSE,
    'failover' => array(),
    'save_queries' => TRUE
);

Answer 1

Double check

1. username
2. password
3. database Name

---

and in config/autoload.php load database as well

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

---

and try simple select methods instead of your code. Use $this->db->select(); it will show the rest of error